Uninterruptible power supply and uninterruptible power supply system

Abstract

The utility model provides an uninterruptible power supply. The uninterruptible power supply comprises a first module and a second module, the first module has a first downward-facing attachment surface on which a first terminal is provided, where no power source is provided within the first module. The second module can be detachably arranged vertically below the first module with respect to the first module, the second module has a second attachment surface which faces upwards and extends parallel to the first attachment surface when the second module is arranged below the first module, and a second wiring terminal is provided on the second attachment surface. The second connection terminal can be electrically connected with the first connection terminal directly or by means of an electric switching mechanism, and the second module is designed to provide electric energy for at least the first module when the second connection terminal is electrically connected with the first connection terminal. The uninterruptible power supply with the above configuration realizes electrical connection at the contact surface between the two modules. The utility model also provides an uninterruptible power supply system with the first module and the second module of the uninterruptible power supply.

Description

Technical Field

[0001] The utility model relates to an electrical device, in particular to an uninterruptible power supply and an uninterruptible power supply system. Background Art

[0002] At present, people have different requirements for the backup time of uninterruptible power supplies. It is difficult for an uninterruptible power supply with a built-in battery to meet the requirements of different usage conditions at the same time. Specifically, if the backup time of the uninterruptible power supply is too short, it cannot meet the usage requirements that require a longer backup time. If the backup time of the uninterruptible power supply is designed to be too long, the equipment cost will increase for customers who only need a shorter backup time. If the built-in battery is removed from the uninterruptible power supply and made into a separate power module to power other modules of the uninterruptible power supply, cables are usually used to achieve electrical connection between the power module and other modules. In the case of cable connection, the installation and transportation of the entire uninterruptible power supply become more cumbersome. At the same time, the cable may also be subjected to bending, extrusion, entanglement, rat bites, etc. After multiple / long-term use, the core wire may be partially broken and the outer sheath of the wire may be damaged, which may lead to poor conduction function and the risk of failure of safety protection. Utility Model Content

[0003] In order to solve at least one of the above problems, the utility model provides an uninterruptible power supply, which includes a first module and a second module, wherein an electrical connection is achieved at a contact surface between the two modules, in which case the second module can be replaced as needed and cables are omitted.

[0004] The utility model provides an uninterruptible power supply, which includes a first module and a second module. The first module has a first attachment surface facing downward, and a first terminal is provided on the first attachment surface, wherein no power is provided in the first module. The second module can be detachably arranged vertically below the first module with respect to the first module, the second module has a second attachment surface facing upward and extending parallel to the first attachment surface when the second module is arranged below the first module, a second terminal is provided on the second attachment surface, the second terminal is designed and arranged to be able to be electrically connected to the first terminal directly or by means of an electrical switching mechanism, and the second module is designed to provide electrical energy to the first module when the second terminal is electrically connected to the first terminal.

[0005] With the uninterruptible power supply having the above configuration, the electrical connection between the first module and the second module can be achieved while the first module and the second module are stacked up and down, and the operation is simple. The entire uninterruptible power supply has a compact structure and does not require additional tools such as power cords, thus avoiding damage or deformation of the power cord.

[0006] Preferably, the uninterruptible power supply also includes a first-level limiting mechanism, which is constructed to include at least four first guide pins extending from the first attachment surface along the circumferential interval, and also includes a first limiting seat fixedly installed to the second attachment surface in a one-to-one correspondence with the first guide pins, the first limiting seat being provided with a first limiting hole for the corresponding first guide pin to be inserted therein with a radial clearance of 0.5 mm to 2 mm.

[0007] Preferably, the uninterruptible power supply also includes a second-level limiting mechanism, which is constructed to include a supporting member attached to the second attachment surface for the second terminal to be installed thereon, and at least two second guide pins extending toward the first attachment surface are fixedly arranged on the supporting member, and the second-level limiting mechanism also includes a second limiting hole correspondingly opened on the first attachment surface, the second limiting hole is positioned and the size is designed to allow the second guide pin to be correspondingly inserted therein with a radial clearance of 0.3 mm to 1. mm, wherein the second guide pin is not allowed to be inserted into the second limiting hole before the first-level limiting mechanism is limited in place.

[0008] Preferably, the first terminal is fixedly mounted to the first attachment surface, and the supporting member is designed to be able to translate relative to the second attachment surface along an orientation parallel to the second attachment surface, and the translation range is between 0.25-1.5 mm.

[0009] Preferably, the second terminal is designed to be capable of translating relative to the support member along any orientation parallel to the second attachment surface, and the translation range is between 0.1-0.5 mm.

[0010] Preferably, the first terminal is a male terminal, the second terminal is a female terminal, and the uninterruptible power supply also includes a third-level limiting mechanism, the third-level limiting mechanism includes a third guide pin extending from the second terminal and a corresponding third limiting hole provided on the first terminal, the third limiting hole is positioned and sized to allow the third guide pin to be inserted therein, wherein the third guide pin is not allowed to be inserted into the third limiting hole before the second-level limiting mechanism is limited in place.

[0011] Preferably, the first terminal and the second terminal are both female terminals, the electrical switching mechanism is a double-ended male terminal connector, and the double-ended male terminal connector is designed so that its two ends can be respectively inserted into the first terminal and the second terminal for electrical connection to achieve electrical conduction between the first terminal and the second terminal.

[0012] Preferably, the double-headed male terminal connector is constructed to include an upper shell and a lower shell which are fixedly connected to each other and jointly surround an internal space, three first through holes are opened on the upper end surface of the upper shell, and three second through holes arranged opposite to the first through holes are opened on the lower end surface of the lower shell, and the double-headed male terminal connector also includes three conductive springs accommodated in the internal space, and the conductive springs are designed in size and arranged to be able to contact the first terminal and the second terminal when the first terminal and the second terminal are inserted into the internal space of the double-headed male terminal connector via the first through hole and the second through hole respectively.

[0013] Preferably, a second terminal switch is provided on a side circumferential surface of the second module, and the second terminal switch is designed to control conduction of a circuit connected to the second terminal.

[0014] Preferably, the first module is designed to include a rectifier component capable of realizing a rectifier function and an inverter component capable of realizing an inverter function, and the second module is designed to be able to supply power to the first module uninterruptedly.

[0015] The utility model also provides an uninterruptible power supply system, which comprises the above-mentioned first module and at least two of the above-mentioned second modules. The at least two second modules have different electrical capacities, and the first module is electrically connected to at least one of the at least two second modules.

[0016] By using the uninterruptible power supply with the above configuration, the user can replace the second module as needed, which can meet the application needs and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The embodiments of the device of the utility model are further described in detail with reference to the accompanying drawings, wherein:

[0018] Figure 1 A schematic diagram of an uninterruptible power supply according to the utility model;

[0019] Figure 2 A schematic structural diagram of a first attachment surface of a first module according to a first embodiment of the present utility model;

[0020] Figure 3 A schematic structural diagram of a second attachment surface of a second module according to a first embodiment of the present utility model;

[0021] Figure 4 A schematic structural diagram of a supporting member and a second terminal according to a first embodiment of the present utility model;

[0022] Figure 5 A schematic diagram of the superposition process of the first module and the second module according to the second embodiment of the present utility model;

[0023] Figure 6 A schematic structural diagram of a double-ended male terminal connector according to a second embodiment of the present invention;

[0024] Figure 7 An internal perspective view of a double-ended male terminal connector according to a second embodiment of the present invention;

[0025] Figure 8 Schematic diagram of the second through hole on the lower housing of the double-ended male terminal connector.

[0026] Reference Numbers List

[0027] 10. uninterruptible power supply; 20. first module; 201. first attachment surface; 30. second module; 301. second attachment surface; 40. first terminal; 50. second terminal; 501. first group of mounting holes; 502. first group of fasteners; 60. first level limiting mechanism; 601. first guide pin; 602. first limiting seat; 603. first limiting hole; 70. second level limiting mechanism; 701. supporting member; 702. second guide pin; 703. second group of fasteners; 704. second limiting hole; 705. lateral connection area; 706. terminal mounting area; 80. third level limiting mechanism; 801. third guide pin; 90. double-headed male terminal connector; 901. upper shell; 903. lower shell; 904. second through hole; 905. conductive spring; 906. second terminal switch; 907. lower end surface.

[0028] In different embodiments, the same components are marked with the same reference numerals. DETAILED DESCRIPTION

[0029] Although the drawings are provided to present some embodiments of the utility model, the drawings do not have to be drawn according to the size of the specific embodiments, and certain features may be enlarged, removed or cut to better illustrate and explain the disclosure of the utility model. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0030] All directional terms (e.g., upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above, below, vertical, horizontal, clockwise and counterclockwise) are used only for identification purposes to help readers understand the present invention, but are not intended to limit, especially the position, direction or use of the present invention. Figure 1 The orientation when viewed from an angle.

[0031] In addition, the terms “first”, “second” and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0032] Figure 1 The schematic diagram of the uninterruptible power supply 10 according to the utility model is shown. The uninterruptible power supply 10 includes a first module 20 and a second module 30, wherein the second module 30 is designed to be detachably arranged vertically below the first module 20, and the two can be connected along Figure 1 The first module 20 is stacked together in the direction of the arrow shown in the figure, or separated in the direction opposite to the arrow shown in the figure. Wherein no power supply is provided in the first module 20, the second module 30 is provided to at least be able to supply power to the first module 20, especially to supply power to the first module uninterruptedly.

[0033] The first module 20 may be, for example, a power module or a communication module. When the first module is a power module, it may include a rectifier component capable of realizing a rectifier function and an inverter component capable of realizing an inverter function. The second module 30 may be, for example, a battery cabinet or a transformer cabinet connected to the mains.

[0034] The first module 20 and the second module 30 are designed to achieve electrical connection on the contact surfaces of the stacked modules. Figures 2 to 4 The first embodiment of the uninterruptible power supply 10 according to the present invention is shown. The first module 20 includes Figure 1 The first attachment surface 201 facing downward (see Figure 2 ), the second module 30 includes a second attachment surface 301 facing upward (see Figure 3 ). When the first module 20 is stacked above the second module 30, the first attachment surface 201 and the second attachment surface 301 are opposite to each other and extend in parallel. In a possible case, the first attachment surface 201 and the second attachment surface 301 may contact each other.

[0035] Specifically, a first connection terminal 40 ( Figure 2 ), a second connection terminal 50 is provided on the second attachment surface 301. Figure 2 and Figure 3 In the example, the first wiring terminal 40 is a male terminal and the second wiring terminal 50 is a female terminal. When the first module 20 is stacked on top of the second module 30, the first wiring terminal 40 will be directly inserted into the second wiring terminal 50 to achieve electrical connection between the first wiring terminal 40 and the second wiring terminal 50. When the second wiring terminal 50 is electrically connected to the first wiring terminal 40, the second module 30 starts to provide power to the first module 20 or transmit other working signals to it.

[0036] Those skilled in the art should understand that this document does not exclude the situation where the first terminal 40 is a female terminal and the second terminal 50 is a male terminal, and other terminal configurations that can achieve direct electrical connection are also within the scope of the present invention.

[0037] By using the uninterruptible power supply 10 having the above configuration, the electrical connection between the first module 20 and the second module 30 can be directly achieved while the cabinets are stacked vertically. The entire uninterruptible power supply 10 has a compact structure. The uninterruptible power supply 10 according to the utility model does not need to provide additional tools such as power cords, so that damage or deformation of the power cord can be avoided.

[0038] It is known to those skilled in the art that if the terminal is subjected to an unexpected external force during the plugging process, it will be deformed, which will affect the accurate connection between the terminal blocks and even the electrical connection performance. In order to achieve accurate plugging between the terminal blocks, the uninterruptible power supply 10 of the utility model also includes a three-level limit mechanism.

[0039] Specifically, the uninterruptible power supply 10 includes a first-level limiting mechanism 60 , a second-level limiting mechanism 70 and a third-level limiting mechanism 80 .

[0040] The first-stage limiting mechanism 60 is constructed to include a first guide pin 601 and a first limiting seat 602. A first limiting hole 603 is provided on the first limiting seat 602 for inserting the first guide pin 601. The first limiting hole 603 is designed to have a radial clearance of 0.3 to 1 mm with the first guide pin 601 after the first guide pin 601 is inserted therein.

[0041] Preferably, see Figure 2 (Only two first guide pins 601 are shown exemplarily), the first guide pins 601 are fixedly mounted to the first attachment surface 201 and extend from the first attachment surface 201 toward the second attachment surface 301. At least four first guide pins 601 are provided, preferably 7 to 8 first guide pins 601 are provided, and they are arranged at intervals along the periphery of the first attachment surface 201.

[0042] Continue to see Figure 3 The first limiting seat 602 is fixedly mounted to the second attachment surface 301 in correspondence with the first guide pin 601. When the first module 20 is stacked on top of the second module 30, the first guide pin 601 is correspondingly inserted into the first limiting hole 603 of the first limiting seat 602 below, so as to first realize the overall positioning of the first module 20 with respect to the second module 30. Figure 3In the embodiment, the second attachment surface 301 is designed to have a protruding outer periphery, and the first limiting seats 602 are arranged at intervals on the outer periphery. It should be understood by those skilled in the art that the second attachment surface 301 can also be a flat extended surface.

[0043] The uninterruptible power supply 10 also includes a second-level limiting mechanism 70. Figures 2 to 4 The second-stage limiting mechanism 70 includes a supporting member 701 attached to the second attachment surface 301 , wherein the second terminal 50 is mounted on the supporting member 701 . Figure 4 , a preferred embodiment of the support member 701 is shown in FIG. 1 , which is configured to include two opposite transverse connection areas 705, and also includes a terminal installation area 706 located between the two transverse connection areas 705 and protruding toward the first module 20 with respect to the transverse connection area 705. The second terminal 50 is attached to the terminal installation area 706. It is conceivable to remove a portion of the terminal installation area 706 to allow the second terminal 50 to be embedded therein.

[0044] At least two second guide pins 702 extending toward the first attachment surface 201 are fixedly disposed on the support member 701. Preferably, the second guide pins 702 are also installed in the terminal mounting area 706. The second-stage limiting mechanism 70 also includes a second limiting hole 704 (see FIG. 1 ) correspondingly opened on the first attachment surface 201. Figure 2 ) for the second guide pin 702 to extend therein. After the second guide pin 702 extends into the second limiting hole 704, the radial clearance between the second guide pin 702 and the second limiting hole 704 is preferably within the range of 0.2-1.0 mm.

[0045] Based on the configuration of the second-stage limiting mechanism 70 , the second terminal block 50 can be roughly positioned relative to the first module 20 after the second guide pin 702 is inserted into the second limiting hole 704 .

[0046] The uninterruptible power supply 10 further includes a third-level limiting mechanism 80. The third-level limiting mechanism 80 is constructed to include a third guide pin 801 fixed on the second terminal 50, and also includes a third limiting hole (not shown in the figure) correspondingly opened on the first terminal 40, and the size and position of the third limiting hole are designed to allow the third guide pin 801 to be inserted therein when the first module 20 is superimposed on the second module 30.

[0047] Based on the configuration of the third-level limiting mechanism 80 , accurate alignment between the first connecting terminal 40 and the second connecting terminal 50 can be achieved.

[0048] In order to prevent the first module 20 from being forcibly superimposed on the second module 30 when the first terminal 40 and the second terminal 50 are not accurately aligned, which may cause damage to the terminals, the first terminal 40 is designed in this article to be fixedly mounted to the first attachment surface 201, but the second terminal 50 is designed to be relatively movably arranged on the second attachment surface 301.

[0049] Specifically, the supporting member 701 is also designed to be able to translate as a whole relative to the second attachment surface 301, especially in any direction parallel to the second attachment surface 301. One preferred implementation is briefly described as follows: a second group of mounting holes (not shown) are respectively provided on two opposing transverse connection areas 705, and a second group of fasteners 703 are provided, and the second group of fasteners 703 pass through the second group of mounting holes to connect the supporting member 701 to the second attachment surface 301. After the supporting member 701 is connected to the second attachment surface 301, a certain radial gap still exists between each fastener in the second group of fasteners 703 and the corresponding mounting hole in the second group of mounting holes, and the radial gap is preferably in the range of 0.25 to 1.5 mm, and particularly preferably 1.2 mm. Therefore, in the process of inserting the second guide pin 702 into the second limiting hole 704, the second guide pin 702 can be translated a certain distance relative to the second limiting hole 704 along any direction parallel to the second attachment surface 301. The translation range is preferably within the range of 0.25 mm to 1.5 mm, and particularly preferably 1.2 mm, so that the second guide pin 702 can be inserted into the second limiting hole 704 more smoothly.

[0050] The second terminal 50 is designed to be able to translate a certain distance along any direction parallel to the second attachment surface 301 with respect to the support member 701, especially the terminal mounting area 706. A preferred implementation is to open a first group of mounting holes 501 on the second terminal 50, and also provide a first group of fasteners 502, which pass through the first group of mounting holes 501 to connect the second terminal 50 to the terminal mounting area 706. After the second terminal 50 is connected to the terminal mounting area 706, there is still a certain radial gap between each fastener in the first group of fasteners 502 and the corresponding mounting hole in the first group of mounting holes, and the radial gap is preferably in the range of 0.1 to 0.5 mm, and is particularly preferably 0.25 mm. Therefore, in the process of inserting the third guide pin 801 into the third limiting hole, the third guide pin 801 can be translated a certain distance relative to the third limiting hole along any direction parallel to the second attachment surface 301. The translation range is preferably 0.1 to 0.5 mm, and particularly preferably 0.25 mm, so that the third guide pin 801 can be inserted into the third limiting hole more smoothly.

[0051] Through this design, the position of the entire second connecting terminal 50 can be adjusted as needed before being plugged into the first connecting terminal 40, thereby achieving an accurate and safe connection.

[0052] In summary, in the process of stacking the first module on the second module, the first-level limiting mechanism is first used to position the first module and the second module as a whole, then the second-level limiting mechanism is used to roughly position the second terminal and the first module, and finally the third limiting mechanism is used to accurately position the first terminal and the second terminal. The second guide pin is not allowed to be inserted into the second limiting hole before the first-level limiting mechanism is limited in place (i.e., the mutual positioning is completed), and the third guide pin is not allowed to be inserted into the third limiting hole before the second-level limiting mechanism is limited in place.

[0053] In this case, the electrical connection step between the first module 20 and the second module 30 can be quickly achieved without the guidance of professionals. The first embodiment is particularly suitable for an uninterruptible power supply of 15-80Kw.

[0054] Figures 5 to 8 FIG. 2 shows a second embodiment of the present invention. In the second embodiment, the first terminal 40 and the second terminal 50 are not directly electrically connected terminals, but need to be electrically connected with the aid of an electrical switching mechanism. Figure 5 The first terminal 40 and the second terminal 50 are both female terminals, and the electrical switching mechanism adopts a double-ended male terminal connector 90. The double-ended male terminal connector 90 has two opposite end faces, and insertion holes are respectively provided on the two opposite end faces for the first terminal 40 and the second terminal 50 to be inserted therein in an electrically connected manner, so as to achieve electrical conduction between the first terminal 40 and the second terminal 50.

[0055] Figure 6 shows an overall schematic diagram of a double-ended male terminal connector 90, Figure 7 The internal situation of the double-ended male terminal connector 90 is shown in the form of a perspective view. The double-ended male terminal connector 90 includes an upper shell 901 and a lower shell 903, which are fixedly connected to each other by, for example, ultrasonic welding, and together surround a hollow internal space. Three first through holes (not shown) are provided on the upper end surface of the upper shell 901, and three second through holes 904 are provided on the lower end surface 907 of the lower shell 903. Figure 8 As shown, the first through hole and the second through hole 904 are arranged opposite to each other. The double-ended male terminal connector 90 further includes three conductive springs 905 accommodated in its internal space, see Figure 7The conductive spring 905 can be made of copper, copper alloy, gold, aluminum, aluminum alloy and other materials. The three conductive springs 905 extend in the internal space along the entire length direction of the double-headed male terminal connector 90. The first terminal 40 extends into the internal space through the first through hole, and the second terminal 50 extends into the internal space through the second through hole 904. After extending into the internal space, the first terminal 40 and the second terminal 50 can respectively contact the two ends of the conductive spring 905, thereby achieving electrical conduction between the first terminal 40 and the second terminal 50.

[0056] In addition, in order to avoid hot plugging of the first module 20 and the second module 30 when they are stacked, it is preferred to provide a second terminal switch 906 (see Figure 5 ), which can control whether the circuit connected to the second terminal 50 is turned on. Specifically, before stacking the first module 20 on the second module 30, the second terminal switch 906 is turned on to disconnect the circuit from the second module 30 to its female terminal, and after stacking, the switch 906 is closed to connect the circuit from the second module 30 to its female terminal, and the current enters the first module 20.

[0057] Of course, those skilled in the art may also think of using other types of electrical switching structures. For example, when one of the first terminal 40 and the second terminal 50 is a male terminal and the other is a female terminal, a POGO PIN connector or a socket may be used.

[0058] The second embodiment is particularly suitable for an uninterruptible power supply with a power less than 20 kW.

[0059] In the third embodiment of the present invention, the uninterruptible power supply 10 includes one first module 20 and at least two second modules 30 , but different second modules 30 have different capacities. The first module 20 is stacked on any one of the at least two second modules 30 .

[0060] For example, three second modules 30 may be provided corresponding to the first module 20, which can respectively supply power to the first module 20 for 5 minutes, 10 minutes, and 15 minutes. The first module 20 may be stacked on the corresponding second module 30 according to the desired power supply time. It is also conceivable to stack the first module 20 on another second module 30 after one of the second modules 30 runs out of power.

[0061] The first guide pin, the second guide pin and the third guide pin involved in this article all preferably adopt a configuration with a narrowed tip, which is conducive to safe and quick positioning.

[0062] In addition, the “radial gap” herein refers to the distance between the outer surface of the component and the inner surface of the receiving hole when the component is inserted into the receiving hole and the component is coaxially arranged with respect to the receiving hole.

Claims

1. An uninterruptible power supply, characterized in that: include: A first module having a first attachment surface facing downward, on which a first connection terminal is disposed, wherein no power source is disposed in the first module; A second module can be detachably arranged vertically below the first module relative to the first module, the second module has a second attachment surface facing upward and extending parallel to the first attachment surface when the second module is arranged below the first module, a second terminal is provided on the second attachment surface, the second terminal is designed and arranged to be electrically connected to the first terminal directly or with the aid of an electrical switching mechanism, and the second module is designed to at least be able to supply power to the first module when the second terminal is electrically connected to the first terminal.

2. The uninterruptible power supply according to claim 1, characterized in that: The uninterruptible power supply also includes a first-level limiting mechanism, which is constructed to include at least four first guide pins extending from the first attachment surface along the circumferential interval, and also includes a first limiting seat fixedly installed to the second attachment surface in a one-to-one correspondence with the first guide pins, the first limiting seat being provided with a first limiting hole for the corresponding first guide pin to be inserted therein with a radial clearance of 0.5 mm to 2 mm.

3. The uninterruptible power supply according to claim 2, characterized in that: The uninterruptible power supply also includes a second-level limiting mechanism, which is constructed to include a supporting member attached to the second attachment surface for the second terminal to be installed thereon, and at least two second guide pins extending toward the first attachment surface are fixedly arranged on the supporting member, and the second-level limiting mechanism also includes a second limiting hole correspondingly opened on the first attachment surface, the second limiting hole is positioned and the size is designed to allow the second guide pin to be correspondingly inserted therein with a radial clearance of 0.3 mm to 1. mm, wherein the second guide pin is not allowed to be inserted into the second limiting hole before the first-level limiting mechanism is limited in place.

4. The uninterruptible power supply according to claim 3, characterized in that: The first terminal is fixedly mounted to the first attachment surface, and the support member is designed to be able to translate relative to the second attachment surface along an orientation parallel to the second attachment surface, and the translation range is between 0.25-1.5 mm.

5. The uninterruptible power supply according to claim 4, characterized in that: The second terminal is designed to be able to translate relative to the support member along any orientation parallel to the second attachment surface, and the translation range is between 0.1-0.5 mm.

6. The uninterruptible power supply according to claim 1, characterized in that: The first wiring terminal and the second wiring terminal are both female terminals, and the electrical switching mechanism is a double-ended male terminal connector, which is designed so that its two ends can be respectively inserted into the first wiring terminal and the second wiring terminal for electrical connection to achieve electrical conduction between the first wiring terminal and the second wiring terminal.

7. The uninterruptible power supply according to claim 6, characterized in that: The double-headed male terminal connector is constructed to include an upper shell and a lower shell which are fixedly connected to each other and jointly surround an internal space, three first through holes are opened on the upper end surface of the upper shell, and three second through holes arranged opposite to the first through holes are opened on the lower end surface of the lower shell, and the double-headed male terminal connector also includes three conductive springs accommodated in the internal space, and the conductive springs are designed in size and arranged to be able to contact the first terminal and the second terminal when the first terminal and the second terminal are inserted into the internal space of the double-headed male terminal connector respectively via the first through holes and the second through holes.

8. The uninterruptible power supply according to claim 7, characterized in that: A second connection terminal switch is provided on the side circumference of the second module, and the second connection terminal switch is designed to control the conduction of the circuit connected to the second connection terminal.

9. An uninterruptible power supply according to any one of the preceding claims, characterized in that The first module is designed to include a rectifying component capable of realizing a rectifying function and an inverting component capable of realizing an inverting function, and the second module is designed to be able to supply power to the first module uninterruptedly.

10. An uninterruptible power supply system, characterized in that: include: A first module of an uninterruptible power supply according to any one of claims 1 to 9; At least two second modules of the uninterruptible power supply according to any one of claims 1 to 9; wherein the at least two second modules have different electrical capacities, and the first module is electrically connected to at least one of the at least two second modules.

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