UPS (Uninterrupted Power Supply) device, backup battery system based on multipath input UPS and electronic equipment

Abstract

The utility model provides a UPS (Uninterrupted Power Supply) device, a backup battery system based on a multi-path input UPS and electronic equipment. The UPS device comprises a UPS control panel, a battery module and a load output switch assembly. A first end of the load output switch assembly is connected with a load output end of the UPS control panel, and a second end of the load output switch assembly is connected with a UPS grounding end of the UPS control panel; and the load output switch assembly is used for enabling a load power supply loop between the load output end of the UPS control panel and the UPS grounding end to be in short circuit under the condition that the load output switch assembly is closed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of uninterruptible power supplies, and in particular to a UPS device, a backup battery system based on a multi-input UPS, and electronic equipment. Background Art

[0002] An uninterruptible power system (UPS) is a power supply device consisting of a rectifier, an inverter, and a battery. When the external power supply network (AC) is normal, the UPS eliminates fluctuations in the external power supply network through the rectifier, converts the AC output of the external power supply network into DC output to charge the battery, and then converts the DC output into AC output through the inverter to power the load. When the external power supply network fails, the UPS converts the DC output of the battery into AC output through the inverter to power the load, thereby ensuring power continuity for the load.

[0003] In related technologies, once a UPS is connected to the load power supply circuit, it directly powers the load. However, in some application scenarios, such as when the UPS is used as a backup power supply device, the UPS is required to selectively power the load. In this case, due to the structural limitations of the UPS, when the UPS is connected to the load power supply circuit as a backup power supply device, this selective power supply function cannot be implemented. Summary of the Invention

[0004] The present disclosure provides a UPS device, a backup battery system based on a multi-input UPS, and an electronic device to solve the problem in the related art that when a UPS is connected to a load power supply circuit as a backup power supply device, it can selectively power or not power a load.

[0005] A first embodiment of the present disclosure provides a UPS device, the UPS device comprising:

[0006] A UPS control board and a battery module, wherein the UPS control board is used to control the external power supply network to supply power to the load when the external power supply network is normal, and is used to control the battery module to supply power to the load when the external power supply network fails; the UPS device also includes a load output switch assembly;

[0007] The first end of the load output switch assembly is connected to the load output end of the UPS control board, and the second end of the load output switch assembly is connected to the UPS grounding end of the UPS control board; the load output switch assembly is used to short-circuit the load power supply circuit between the load output end of the UPS control board and the UPS grounding end when the load output switch assembly is closed.

[0008] In one embodiment, the load output switch assembly includes:

[0009] a first switch control circuit and a first switch;

[0010] The first switch control circuit includes a MOS transistor array, a first resistor and a first diode; the MOS transistor array includes one or at least two MOS transistors connected in parallel;

[0011] The drain terminal of the MOS transistor array is connected to the UPS ground terminal of the UPS control board, the source terminal of the MOS transistor array is connected to the UPS low level terminal of the UPS control board, and the gate terminal of the MOS transistor array is connected to the second terminal of the first switch; the positive terminal of the first diode is grounded, the negative terminal of the first diode is connected to the gate terminal of the MOS transistor array, and the first resistor is connected in parallel to both ends of the first diode;

[0012] The first end of the first switch is connected to the load output end of the UPS control board.

[0013] In one embodiment, the MOS transistor array includes a first MOS transistor, a second MOS transistor, and a third MOS transistor connected in parallel;

[0014] The terminal obtained by connecting the drains of the first MOS transistor, the second MOS transistor, and the third MOS transistor in parallel is the drain terminal of the MOS transistor array; the terminal obtained by connecting the sources of the first MOS transistor, the second MOS transistor, and the third MOS transistor in parallel is the source terminal of the MOS transistor array; and the terminal obtained by connecting the gates of the first MOS transistor, the second MOS transistor, and the third MOS transistor in parallel is the gate terminal of the MOS transistor array.

[0015] In one embodiment, the first switch control circuit further includes a second resistor;

[0016] The gate of the MOS transistor array is connected to the second end of the first switch through the second resistor.

[0017] In one embodiment, the UPS control board is a control board based on the bq24610 integrated chip.

[0018] A second embodiment of the present disclosure provides a backup battery system based on a multi-input UPS. The backup battery system based on a multi-input UPS includes:

[0019] At least two UPS devices; wherein the UPS devices include any one of the UPS devices provided in the first embodiment;

[0020] The first external power supply network input terminal of the UPS control board of each of the at least two UPS devices is used to connect to the first input terminal of the external power supply network, and the second external power supply network input terminal of the UPS control board of each of the at least two UPS devices is used to connect to the second input terminal of the external power supply network; wherein the external power supply network is used to supply power to the load through the UPS device;

[0021] The load output terminal of the UPS control board of each of the at least two UPS devices is used to connect to the load input terminal of the load, the UPS ground terminal of the UPS control board of each of the at least two UPS devices is used to connect to the load ground terminal of the load, and the UPS ground terminal of the UPS control board of each of the at least two UPS devices is also used to connect to the battery ground terminal of the battery module corresponding to the UPS device;

[0022] The charging output end of the UPS control board of each of the at least two UPS devices is used to connect to the charging input end of the battery module corresponding to the UPS device.

[0023] In one embodiment, the backup battery system based on the multi-input UPS further includes a host computer and a communication module; the battery module further includes a battery management unit;

[0024] The signal output terminal of the battery management unit is connected to the signal input terminal of the communication module, and the battery management unit is used to collect battery information of the battery module and send the battery information to the communication module;

[0025] The signal output terminal of the communication module is connected to the signal input terminal of the host computer.

[0026] In one embodiment, the communication module is connected to the host computer via RS-232 communication.

[0027] A third embodiment of the present disclosure provides an electronic device, which includes any one of the backup battery systems based on a multi-input UPS provided in the second embodiment of the present disclosure.

[0028] In summary, the present disclosure proposes a UPS device, a backup battery system based on a multi-input UPS, and an electronic device. The UPS device includes a UPS control board and a battery module. The UPS control board is used to control the external power supply network to supply power to the load when the external power supply network is normal, and to control the battery module to supply power to the load when the external power supply network fails; the UPS device also includes a load output switch component; the first end of the load output switch component is connected to the load output end of the UPS control board, and the second end of the load output switch component is connected to the UPS ground end of the UPS control board; the load output switch component is used to short-circuit the load power supply circuit between the load output end of the UPS control board and the UPS ground end when the load output switch component is closed.

[0029] The UPS device provided by the present disclosure, through the setting of the load output switch component, when the load output switch component is closed, the load power supply circuit between the load output terminal of the UPS control board and the UPS ground terminal is short-circuited, thereby allowing the UPS device to be connected to the load power supply circuit, and the UPS device may not supply power to the load; thereby realizing the function of being able to selectively supply or not supply power to the load when the UPS is connected to the load power supply circuit as a backup power supply device.

[0030] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description are used to explain the principles of the present disclosure, and do not constitute an improper limitation of the present disclosure.

[0032] Figure 1 A schematic diagram of the structure of a UPS device provided in an embodiment of the present disclosure;

[0033] Figure 2 A schematic structural diagram of a load output switch assembly provided in an embodiment of the present disclosure;

[0034] Figure 3 A schematic diagram of the structure of a backup battery system based on a multi-input UPS provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] The following description of exemplary embodiments of the present disclosure is made in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0036] An uninterruptible power system (UPS) is a power supply device consisting of a rectifier, an inverter, and a battery. When the external power supply network 101 (AC) is operating normally, the UPS eliminates fluctuations in the external power supply network 101 through the rectifier. It also converts the AC output of the external power supply network 101 into DC output to charge the battery. The inverter then converts the DC output back into AC output to power the load 102. When the external power supply network 101 fails, the UPS converts the DC output of the battery into AC output through the inverter to power the load 102, thereby ensuring power continuity for the load 102.

[0037] In related art, once a UPS is connected to the load power supply circuit, it directly supplies power to the load 102. However, in some application scenarios, such as when the UPS is used as a backup power supply device, the UPS is required to selectively supply power to or not to the load 102. In this case, due to structural limitations of the UPS, when the UPS is used as a backup power supply device and connected to the load power supply circuit, this selective supply of power to or not to the load 102 cannot be achieved.

[0038] In order to solve the problem in the related art that when the UPS is connected to the load power supply circuit as a backup power supply device, it is possible to selectively supply power to the load 102 or not, the UPS device provided in the present disclosure has a load output switch component 105. When the load output switch component 105 is closed, the load power supply circuit between the load output terminal of the UPS control board 103 and the UPS ground terminal is short-circuited, thereby enabling the UPS device to not supply power to the load 102 when the UPS device is connected to the load power supply circuit; thereby realizing the function of selectively supplying power to the load 102 or not when the UPS is connected to the load power supply circuit as a backup power supply device.

[0039] like Figure 1 As shown, Figure 1 A schematic diagram of the structure of a UPS device provided in an embodiment of the present disclosure.

[0040] The UPS device provided by the embodiment of the present disclosure includes a UPS control board 103 and a battery module 104. The UPS control board 103 is used to control the external power supply network 101 to supply power to the load 102 when the external power supply network 101 is normal, and to control the battery module 104 to supply power to the load 102 when the external power supply network 101 fails; the UPS device provided by the embodiment of the present disclosure also includes a load output switch component 105; the first end of the load output switch component 105 is connected to the load output end of the UPS control board 103, and the second end of the load output switch component 105 is connected to the UPS ground end of the UPS control board 103; the load output switch component 105 is used to short-circuit the load power supply circuit between the load output end of the UPS control board 103 and the UPS ground end when the load output switch component 105 is closed.

[0041] In one embodiment, the external power supply network 101 may be a mains power supply network, a community power supply network, a clean energy power supply network (such as a wind power supply network, a hydropower supply network), etc.

[0042] In one embodiment, the rectifier in the UPS can eliminate power fluctuations in the external power supply network 101, such as power fluctuations in the clean energy power supply network caused by parameters of power conversion devices (such as wind-power-electricity, hydropower-electricity) or changes in wind and hydropower in the environment, and power fluctuations in the mains power supply network or community power supply network due to uncontrollable factors in the transmission line.

[0043] In one embodiment, the UPS control board 103 utilizes a control board based on the bq24610 integrated circuit. For example, the UPS control board 103 comprises the bq24610 integrated circuit and its peripheral circuits; the bq24610 integrated circuit and its peripheral circuits implement the rectifier and inverter functions of the UPS control board 103. The bq24610 integrated circuit and its peripheral circuits also control the external power supply network 101 to supply power to the load 102 when the external power supply network 101 is functioning normally, and control the battery module 104 to supply power to the load 102 when the external power supply network 101 fails.

[0044] In one embodiment, when the load output switch assembly 105 is closed, the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103 directly form a circuit, short-circuiting the load 102 between the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103. This allows the UPS to selectively not supply power to the load 102 when it is connected to the load power supply circuit as a backup power supply device. Conversely, when the load output switch assembly 105 is open, the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103 are disconnected, preventing the load 102 from being short-circuited between the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103. This allows the UPS to selectively supply power to the load 102 when it is connected to the load power supply circuit as a backup power supply device.

[0045] In one embodiment, the load output switch assembly 105 may employ a first switch K1 (e.g., a knife switch or a push button switch) or a load output switch assembly 105 comprised of the first switch K1 and a first switch control circuit. Knife switches and push button switches consume significant power and, due to the lack of protective devices, may damage the UPS control board 103 or the load 102 when closed or opened. Therefore, preferably, the load output switch assembly 105 employs a load output switch assembly 105 comprised of the first switch K1 and a first switch control circuit.

[0046] Based on this, Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a load output switch assembly 105 provided in an embodiment of the present disclosure. The load output switch assembly 105 includes: a first switch control circuit and a first switch K1; the first switch control circuit includes a MOS transistor array, a first resistor R1, and a first diode D1; the MOS transistor array includes one or at least two MOS transistors connected in parallel; the drain terminal of the MOS transistor array is connected to the UPS ground terminal of the UPS control board 103, the source terminal of the MOS transistor array is connected to the UPS low-level terminal of the UPS control board 103, and the gate terminal of the MOS transistor array is connected to the second terminal of the first switch K1; the positive terminal of the first diode D1 is grounded, the cathode terminal of the first diode D1 is connected to the gate terminal of the MOS transistor array, and the first resistor R1 is connected in parallel across the first diode D1; and the first terminal of the first switch K1 is connected to the load output terminal of the UPS control board 103.

[0047] In one embodiment, the MOS transistor array may be a PMOS transistor array or an NMOS transistor array. A MOS transistor array refers to a MOS transistor array formed by connecting the gates, sources, and drains of multiple MOS transistors. Compared to a switch control circuit composed of a single MOS transistor, a MOS transistor array has lower power consumption and faster switching speed.

[0048] In one embodiment, the first resistor R1 serves as a current resistor to prevent the MOS array from being burned out.

[0049] In one embodiment, the first diode D1 may be a Schottky diode.

[0050] In one embodiment, when the first switch K1 is closed, the MOS transistors in the MOS transistor array are turned on, that is, the first switch control circuit is turned on, thereby forming a direct circuit between the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103, short-circuiting the load 102 between the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103. This achieves the function of selectively not supplying power to the load 102 when the UPS is connected to the load power supply circuit as a backup power supply device. Conversely, when the first switch K1 is opened, the MOS transistors in the MOS transistor array are disconnected, that is, the first switch control circuit is disconnected, thereby disconnecting the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103. This does not short-circuit the load 102 between the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103, thereby achieving the function of selectively supplying power to the load 102 when the UPS is connected to the load power supply circuit as a backup power supply device.

[0051] In one embodiment, the MOS transistor array includes a plurality of MOS transistors connected in parallel, such as two, three, or four. Taking the MOS transistor array including three MOS transistors connected in parallel as an example, the MOS transistor array includes a first MOS transistor Q1, a second MOS transistor Q2, and a third MOS transistor Q3 connected in parallel; a terminal formed by connecting the drains of the first MOS transistor Q1, the second MOS transistor Q2, and the third MOS transistor Q3 in parallel serves as a drain terminal of the MOS transistor array; a terminal formed by connecting the sources of the first MOS transistor Q1, the second MOS transistor Q2, and the third MOS transistor Q3 in parallel serves as a source terminal of the MOS transistor array; and a terminal formed by connecting the gates of the first MOS transistor Q1, the second MOS transistor Q2, and the third MOS transistor Q3 in parallel serves as a gate terminal of the MOS transistor array.

[0052] In one embodiment, in order to adjust the voltage value output by the UPS device to the load 102, the first switch control circuit further includes a second resistor R2; the gate of the MOS transistor array is connected to the second end of the first switch K1 through the second resistor R2.

[0053] In order to realize that multiple UPS are dedicated as backup power equipment to access the load power supply circuit, such as Figure 3 As shown, the embodiment of the present disclosure further provides a backup battery system based on a multi-input UPS. The backup battery system based on a multi-input UPS provided by the embodiment of the present disclosure includes:

[0054] At least two UPS devices; wherein the UPS devices include the UPS devices provided by the aforementioned embodiments of the present disclosure; wherein the first external power supply network 101 input terminal of the UPS control board 103 of each of the at least two UPS devices is used to connect to the first input terminal of the external power supply network 101, and the second external power supply network 101 input terminal of the UPS control board 103 of each of the at least two UPS devices is used to connect to the second input terminal of the external power supply network 101; wherein the external power supply network 101 is used to supply power to a load 102 through the UPS devices;

[0055] The load output terminal of the UPS control board 103 of each of the at least two UPS devices is used to connect to the load input terminal of the load 102, the UPS ground terminal of the UPS control board 103 of each of the at least two UPS devices is used to connect to the load ground terminal of the load 102, and the UPS ground terminal of the UPS control board 103 of each of the at least two UPS devices is also used to connect to the battery ground terminal of the battery module 104 corresponding to the UPS device;

[0056] The charging output end of the UPS control board 103 of each of the at least two UPS devices is used to connect to the charging input end of the battery module 104 corresponding to the UPS device.

[0057] In one embodiment, when the external power supply network 101 is normal, the UPS control board 103 controls the external power supply network 101 to supply power to the load 102; and since the charging output end of the UPS control board 103 of each of the at least two UPS devices is used to connect to the charging input end of the battery module 104 corresponding to the UPS device, therefore, when the external power supply network 101 is normal, the UPS control board 103 is also used to control the external power supply network 101 to charge the corresponding battery module 104; when the external power supply network 101 fails, the UPS control board 103 controls the corresponding battery module 104 to supply power to the load 102.

[0058] In one embodiment, since the load output terminal of the UPS control board 103 of each of the at least two UPS devices is used to connect to the load input terminal of the load 102, the UPS grounding terminal of the UPS control board 103 of each of the at least two UPS devices is used to connect to the load grounding terminal of the load 102, and the UPS grounding terminal of the UPS control board 103 of each of the at least two UPS devices is also used to connect to the battery grounding terminal of the battery module 104 corresponding to the UPS device; therefore, when the load output switch component 105 of the UPS device is closed, the load output terminal of the UPS control board 103 and the UPS grounding terminal of the UPS control board 103 directly form a loop, short-circuiting the load 102 between the load output terminal of the UPS control board 103 and the UPS grounding terminal of the UPS control board 103, thereby achieving the function of selectively not supplying power to the load 102 when the UPS is connected to the load power supply circuit as a backup power supply device. On the contrary, when the load output switch component 105 of the UPS device is disconnected, the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103 are short-circuited, and the load 102 between the load output terminal of the UPS control board 103 and the UPS ground terminal of the UPS control board 103 will not be short-circuited, so that the UPS can be connected to the load power supply circuit as a backup power supply device and can selectively supply power to the load 102.

[0059] Among them, Figure 3 As shown, the number of the at least two UPS devices may be two, three or N; Figure 3The number of UPS devices (including UPS control board 103-1 and corresponding battery module 104-1, UPS control board 103-2 and corresponding battery module 104-2, ..., UPS control board 103-N and corresponding battery module 104-N) is not limited. Specifically, only the load output switch assembly of the first UPS device can be disconnected to enable the first UPS device to power the load, while the other UPS devices do not. Alternatively, the load output switch assemblies of multiple UPS devices can be disconnected to enable multiple UPS devices to power the load simultaneously. Detailed descriptions are omitted here.

[0060] In summary, the backup battery system based on a multi-input UPS provided in the embodiment of the present disclosure can control the corresponding UPS device to supply or not supply power to the load 102 by closing or opening the load output switch component 105 of each UPS device.

[0061] In one embodiment, it also includes a backup battery system host computer and a communication module based on a multi-input UPS provided in an embodiment of the present disclosure; the battery module 104 also includes a battery management unit; the signal output end of the battery management unit is connected to the signal input end of the communication module, and the battery management unit is used to collect battery information of the battery module 104 and send the battery information to the communication module; the signal output end of the communication module is connected to the signal input end of the host computer.

[0062] In one embodiment, the host computer is connected to the communication module and can monitor the battery module 104 of each UPS device on the host computer, such as the power level information or charge / discharge status of each UPS device's battery module 104. The power level information or charge / discharge status of each UPS device's battery module 104 is acquired by the corresponding UPS device's Battery Management System (BMS) and transmitted to the communication module via the BMS's signal output terminal. The BMS can be based on the Sh367309 integrated chip.

[0063] In one embodiment, the communication module is connected to the host computer via RS-232 communication. Specifically, the communication module can be a communication module based on the STM32F103RCT6 integrated chip, which realizes RS-232 communication connection with the host computer via the SN75155DR integrated chip.

[0064] An embodiment of the present invention further provides an electronic device, comprising the aforementioned backup battery system based on a multi-input UPS.

[0065] An embodiment of the present invention further provides a vehicle, comprising the aforementioned protection circuit or the aforementioned electronic device.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0068] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0069] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0070] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0071] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A UPS device comprising a UPS control board and a battery module, wherein the UPS control board is used to control the external power supply network to supply power to a load when the external power supply network is normal, and to control the battery module to supply power to the load when the external power supply network fails, characterized in that: Also included is a load output switch assembly; The first end of the load output switch assembly is connected to the load output end of the UPS control board, and the second end of the load output switch assembly is connected to the UPS grounding end of the UPS control board; the load output switch assembly is used to short-circuit the load power supply circuit between the load output end of the UPS control board and the UPS grounding end when the load output switch assembly is closed.

2. The UPS device according to claim 1, wherein: The load output switch assembly includes: a first switch control circuit and a first switch; The first switch control circuit includes a MOS transistor array, a first resistor and a first diode; the MOS transistor array includes one or at least two MOS transistors connected in parallel; The drain terminal of the MOS transistor array is connected to the UPS ground terminal of the UPS control board, the source terminal of the MOS transistor array is connected to the UPS low level terminal of the UPS control board, and the gate terminal of the MOS transistor array is connected to the second terminal of the first switch; the positive terminal of the first diode is grounded, the negative terminal of the first diode is connected to the gate terminal of the MOS transistor array, and the first resistor is connected in parallel to both ends of the first diode; The first end of the first switch is connected to the load output end of the UPS control board.

3. The UPS device according to claim 2, wherein: The MOS transistor array includes a first MOS transistor, a second MOS transistor and a third MOS transistor connected in parallel; The terminal obtained by connecting the drains of the first MOS transistor, the second MOS transistor, and the third MOS transistor in parallel is the drain terminal of the MOS transistor array; the terminal obtained by connecting the sources of the first MOS transistor, the second MOS transistor, and the third MOS transistor in parallel is the source terminal of the MOS transistor array; and the terminal obtained by connecting the gates of the first MOS transistor, the second MOS transistor, and the third MOS transistor in parallel is the gate terminal of the MOS transistor array.

4. The UPS device according to claim 2, wherein: The first switch control circuit further includes a second resistor; The gate of the MOS transistor array is connected to the second end of the first switch through the second resistor.

5. The UPS device according to claim 1, wherein: The UPS control board adopts a control board based on the bq24610 integrated chip.

6. A backup battery system based on a multi-input UPS, characterized in that: include: At least two UPS devices; wherein the UPS device comprises the UPS device according to any one of claims 1 to 5; The first external power supply network input terminal of the UPS control board of each of the at least two UPS devices is used to connect to the first input terminal of the external power supply network, and the second external power supply network input terminal of the UPS control board of each of the at least two UPS devices is used to connect to the second input terminal of the external power supply network; wherein the external power supply network is used to supply power to the load through the UPS device; The load output terminal of the UPS control board of each of the at least two UPS devices is used to connect to the load input terminal of the load, the UPS ground terminal of the UPS control board of each of the at least two UPS devices is used to connect to the load ground terminal of the load, and the UPS ground terminal of the UPS control board of each of the at least two UPS devices is also used to connect to the battery ground terminal of the battery module corresponding to the UPS device; The charging output end of the UPS control board of each of the at least two UPS devices is used to connect to the charging input end of the battery module corresponding to the UPS device.

7. The backup battery system based on multi-input UPS according to claim 6, characterized in that: It also includes a host computer and a communication module; the battery module also includes a battery management unit; The signal output terminal of the battery management unit is connected to the signal input terminal of the communication module, and the battery management unit is used to collect battery information of the battery module and send the battery information to the communication module; The signal output terminal of the communication module is connected to the signal input terminal of the host computer.

8. The backup battery system based on multi-input UPS according to claim 7, characterized in that: The communication module is connected to the host computer via RS-232 communication.

9. An electronic device, characterized in that: A backup battery system based on a multi-input UPS comprising any one of claims 6 to 8.

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