Battery board used in uninterruptible power supply

Abstract

To provide a battery board used in an uninterruptible power supply.SOLUTION: A battery board 20 used in an uninterruptible power supply 10 includes: a storage battery unit 70; an input / output unit 30 having an input terminal 31 for AC input, an output terminal 32 for AC output, and a breaker 35 for isolating the input and output; a parallel unit 40 for switching the AC output to the output terminal 32; and a housing 80 for accommodating the battery unit 70, the input / output unit 30, and the parallel unit 40. The input / output unit 30 has a bypass path L3 that connects the input terminal 31 to the output terminal 32 without passing through the parallel unit 40, by switching the breaker 35. The parallel unit 40 is separate from the input / output unit 30 and is attachable to and detachable from the housing 80.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a battery panel for use in an uninterruptible power supply. [Background technology]

[0002] An uninterruptible power supply is a device that supplies power to a load without power interruption, and includes a storage battery unit, a power conversion unit, a parallel unit that switches AC output, etc. Patent Document 1 is a document that discloses technology related to uninterruptible power supplies. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-151052 Summary of the Invention [Problem to be solved by the invention]

[0004] Some uninterruptible power supplies have a structure in which input / output units and parallel units are housed in a battery panel. In uninterruptible power supplies with this structure, it is sometimes impossible to remove the parallel unit from the battery panel unless the AC output is stopped, making maintenance difficult. An object of the present invention is to enable parallel units to be removed while the lines are live, thereby improving the maintainability of uninterruptible power supplies. [Means for solving the problem]

[0005] A battery panel used in an uninterruptible power supply comprises a storage battery unit, an input / output unit having an input terminal for AC input, an output terminal for AC output, and a breaker for cutting off input and output, a parallel unit for switching AC output to the output terminal, and a housing for accommodating the storage battery unit, the input / output unit, and the parallel unit.

[0006] The input / output unit has a bypass path that connects the input terminal to the output terminal without passing through the parallel unit by switching the breaker. The parallel unit is separate from the input / output unit and can be attached to and detached from the housing. [Effects of the Invention]

[0007] This invention allows the parallel unit to be removed from the battery panel without stopping AC output, making it possible to replace or perform maintenance on the parallel unit at any time. [Brief explanation of the drawings]

[0008] [Figure 1] Front view of uninterruptible power supply [Figure 2] Figure showing the state where the front wall of the battery panel has been removed from Figure 1 [Figure 3] Enlarged view of the input / output unit [Figure 4] Perspective view of the uninterruptible power supply (front wall of the battery panel and top panel of the power conversion panel are omitted) [Figure 5] Uninterruptible Power Supply Circuit Diagram [Figure 6] A perspective view of an input / output unit and a parallel unit [Figure 7] FIG. 7 is a diagram showing the state in which the front wall, top wall, and rear wall of the parallel unit have been removed from FIG. 6. [Figure 8] Diagonal rear view of Figure 6 [Figure 9] Diagram showing the parallel unit removal operation [Figure 10] Cross-sectional view of input / output unit and parallel unit DETAILED DESCRIPTION OF THE INVENTION

[0009] (Outline of this embodiment) (1) A battery panel according to one embodiment of the present invention, comprising: a storage battery unit; an input / output unit having an input terminal for AC input, an output terminal for AC output, and a breaker for interrupting input and output; a parallel unit for switching AC output to the output terminal; and a housing for accommodating the storage battery unit, the input / output unit, and the parallel unit.

[0010] The input / output unit has a bypass path that connects the input terminal to the output terminal without passing through the parallel unit by switching the breaker. The parallel unit is separate from the input / output unit and can be attached to and detached from the housing.

[0011] According to the battery panel of one embodiment of the present invention, by selecting a bypass path, it is possible to remove a parallel unit from the battery panel without stopping AC output, which allows replacement and maintenance of the parallel unit at any time.

[0012] (2) In the battery panel described in (1) above, the parallel unit may be disposed inside the housing above the input / output unit. With this configuration, the parallel unit can be removed without being hindered by wiring of the input / output unit.

[0013] (3) In the battery panel described in (1) or (2) above, the parallel unit includes a circuit board and a casing that houses the circuit board, and the casing includes an intermediate wall that divides the interior of the casing into front and rear sections. The intermediate wall may be located behind the input / output unit in the front-to-rear direction of the battery panel, and the casing may have a first area in front of the intermediate wall that does not house the circuit board, and a second area behind the intermediate wall that houses the circuit board. A connector for wiring may be attached to the front surface of the intermediate wall. A through-hole for wiring may be provided in the bottom wall of the casing, corresponding to the connector on the intermediate wall. With this configuration, the wiring connected to the parallel unit can be easily disconnected when removing the parallel unit from the battery panel.

[0014] <Embodiment> 1. Overall configuration of uninterruptible power supply 10 This embodiment shows an outdoor-installed uninterruptible power supply 10 for continuous commercial use. Figure 1 is a front view of the uninterruptible power supply 10. In the following description, the left-right direction in Figure 1 is the X direction, the up-down direction is the Y direction, and the direction perpendicular to the paper surface is the Z direction.

[0015] 1 and 2, the uninterruptible power supply 10 includes a support base 15 and a battery panel 20 installed on the upper surface of the support base 15. The battery panel 20 includes an input / output unit 30, a parallel unit 40, a plurality of storage battery units 70A to 70G, and a first housing 80 that houses these. The Z direction is the front-to-rear direction of the battery panel 20, and in this embodiment, the opening side (the front right side in FIG. 4) will be described as the front side, and the opposite side (the rear left side in FIG. 4) will be described as the rear side.

[0016] The first housing 80 is made of, for example, metal. The first housing 80 is box-shaped and long in the Y direction, and has a front wall 81, left and right side walls 82 and 83, a rear wall 84, a ceiling wall 85, and a bottom wall 86. The front wall 81 is a door that can be opened and closed via a hinge.

[0017] The input / output unit 30, parallel unit 40, and storage battery unit 70 are box-shaped and large enough to be housed in a first housing 80, which houses the input / output unit 30, parallel unit 40, and multiple (seven in this example) storage battery units 70A-70G in this order from the bottom up. The storage battery units 70A-70G are formed by housing multiple storage batteries in a casing made of metal or the like or by holding them on a base, thereby forming a unit.

[0018] The input / output unit 30 performs input / output and interruption thereof, and as shown in Fig. 3, has an input terminal 31 for AC input, an output terminal 32 for AC output, multiple breakers 35, a lightning arrester 36, and a casing 38 made of metal or the like that houses these. Ventilation holes are formed in the side and rear portions of the casing 38. The input terminal 31 is a terminal that is connected to the power system, and the output terminal 32 is a terminal for outputting to a load.

[0019] 4, the uninterruptible power supply 10 includes a power conversion panel 100 in addition to the battery panel 20. The power conversion panel 100 has a second housing 110 and a plurality of power converters 150 housed in the second housing 110, and is disposed below the side of the battery panel 20.

[0020] 2. Circuit configuration of uninterruptible power supply 10 5 is a block diagram of the uninterruptible power supply 10. The uninterruptible power supply 10 includes an input / output unit 30, a parallel unit 40, a storage battery unit 70, and a power conversion panel 100 as an electrical configuration.

[0021] The input / output unit 30 has an input terminal 31, an output terminal 32, and a plurality of breakers 35A to 35E. The parallel unit 40 includes a parallel board 45 having a first relay 41 and a second relay .

[0022] The input terminal 31 is connected to one end (the left end in FIG. 5) of a first relay 41 via a first breaker 35A. The output terminal 32 is connected to the other end (the right end in FIG. 5) of the first relay 41 via a second breaker 35B.

[0023] The other end (right end in FIG. 5) of second relay 42 is connected to the other end (right end in FIG. 5) of first relay 41. One end (left end in FIG. 5) of second relay 42 is connected to power conversion panel 100, and multiple storage battery units 70A to 70G are connected in parallel to power conversion panel 100 via third breaker 35C. FIG. 5 shows only three units, 70A to 70C, and 70D to 70G are omitted.

[0024] Furthermore, a lightning arrester 36 is installed in the input / output unit 30. The lightning arrester 36 is installed between the input terminal 31 and the common terminal 33 via a fourth breaker 35D, and serves to protect the uninterruptible power supply 10 from surges caused by lightning strikes and the like.

[0025] Under normal circumstances (when there is no abnormality in the power grid), power can be supplied from the power grid to the load by selecting the first path L1 that passes through the first relay 41. During a power outage, power can be supplied from the storage battery unit 70 to the load by switching from the first path L1 that passes through the first relay 41 to the second path L2 that passes through the second relay 42.

[0026] Furthermore, an outlet 37 and a third path L3 are installed as maintenance equipment in the input / output unit 30. The outlet 37 is connected to the input terminal 31 via a fifth breaker 35E.

[0027] 5, the third path L3 connects points A and B on the first path L1, bypassing the first breaker 35A, the parallel unit 40, and the second breaker 35B, and connecting the input terminal 31 and the output terminal 32. A fifth breaker 35E is provided on the third path L3.

[0028] The second breaker 35B and the fifth breaker 35E have a mechanical interlock, so that when one of the breakers 35B and 35E is closed, the other breaker 35B and 35E is not closed.

[0029] 3. Detachable structure of parallel unit 40 Fig. 6 is a perspective view of the input / output unit 30 and the parallel unit 40. Fig. 7 is a view showing the state in which the front wall 54, top wall 57, and rear wall 56 of the parallel unit have been removed from Fig. 6. Fig. 8 is a view of Fig. 6 as seen from behind.

[0030] The parallel unit 40 is separate from the input / output unit 30 and includes one or more circuit boards 45 and a casing 50 made of metal or the like that houses the one or more circuit boards 45. The one or more circuit boards 45 are a parallel board that switches between the first path L1 and the second path L2, a control board, a power supply board, or the like.

[0031] As shown in FIGS. 6 to 8, the casing 50 of the parallel unit 40 has a bottom wall 51, a right side wall 52, a left side wall 53, a front wall 54, a middle wall 55, a rear wall 56, and a top wall 57.

[0032] In this embodiment, the bottom wall 51, right side wall 52, and left side wall 53 are integral, and the rear wall 56 and top wall 57 are integral. A ventilation hole 56A is formed in the rear wall 56. In addition, flanges 52A and 53A are provided at the front ends of the right side wall 52 and the left side wall 53. The flanges 52A and 53A are for fixing to the battery panel 20.

[0033] As shown in FIG. 9, rail portions 87 are provided on the inner surfaces of the left and right side walls 82, 83 of the first housing 80 of the battery panel 20 in correspondence with the parallel unit 40.

[0034] The rail portion 87 has a U-shaped cross section and extends horizontally in the front-to-rear direction (Z direction) of the battery panel 20. The rail portion 87 allows the parallel unit 40 to be fitted onto the battery panel 20 from the front side.

[0035] With the parallel unit 40 housed in the rail portion 87, the flanges 52A and 53A are screwed together, thereby attaching the parallel unit 40 to the battery panel 20.

[0036] After removing the screws, the parallel unit 40 can be removed from the battery panel 20 by pulling it out horizontally along the rail portion 87.

[0037] As shown in FIGS. 7 and 10, the intermediate wall 55 is located between the front wall 54 and the rear wall 56, and separates the casing 50 into a front and a rear wall.

[0038] The casing 50 has a first region V1 in front of the intermediate wall 55 that does not house the circuit board 45, and a second region V2 behind the intermediate wall 55 that houses the circuit board 45. In this embodiment, a tray-shaped base 47 is provided in the second region V2, and the circuit boards 45 are arranged on the upper and lower surfaces of the base 47. Fig. 10 shows only the circuit board 45 on the upper surface, and the circuit board 45 on the lower surface is omitted.

[0039] As shown in FIG. 10, the intermediate wall 55 of the parallel unit 40 is located rearward (to the left in FIG. 10) of the rear end surface 39 of the input / output unit 30 in the front-to-rear direction (Z direction).

[0040] A connector 55A for wiring is provided on the front surface of the intermediate wall 55 of the parallel unit 40, and further, a through hole 51A for wiring is provided through the bottom wall 51 of the parallel unit 40, corresponding to the connector 55A of the intermediate wall 55.

[0041] As shown in FIG. 10, in this battery panel 20, the electrical cable K1 is pulled into the first region V1 in the casing 50 through the through hole 51A and then connected to the connector 55A, and wiring to the parallel unit 40 (connection of the electrical cable K1) can be performed using the space behind the input / output unit 30.

[0042] With this configuration, wiring work for the parallel unit 40 or removal work for the parallel unit 40 can be easily performed without being obstructed by the input / output unit 30.

[0043] 4. Procedure for removing parallel unit 40 under live power When removing the parallel unit 40 under live conditions, first, open the front wall 21 of the battery panel 20, switch the first breaker 35A and the second breaker 35B from closed to open, and switch the fifth breaker 35E from open to closed.

[0044] As a result, the input terminal 31 and the output terminal 32 are connected by a third path L3 that bypasses the parallel unit 40, so that the AC output input from the power system bypasses the parallel unit 40 and is output.

[0045] Next, the first relay 41 and the second relay 42 of the parallel unit 40 are both switched to an open state, and then the front wall 54 of the casing 50 is removed.

[0046] When the front wall 54 is removed, the parallel unit 40 is left in a state where the intermediate wall 55 and wiring (electrical cable K1 shown in Figure 10) are exposed, so the wiring (electrical cable K1) of the parallel unit 40 can be removed by uncoupling the connector 55A.

[0047] After that, the screws on flanges 52A and 53A are loosened and removed, and then the parallel unit 40 can be removed from the battery panel 20 without stopping the AC output by pulling it out horizontally along the rail portion 87 (hot swap).

[0048] Furthermore, since the parallel unit 40 is disposed above the input / output unit 30 as shown in Figures 2, 7, and 10, the parallel unit 40 can be removed from the battery panel 20 without being obstructed by the wiring of the input / output unit 30 (electrical cables K2 and K3 shown in Figure 10).

[0049] 5.Effects According to the embodiment, the parallel unit 40 can be replaced and maintained at any time. Therefore, it is possible to provide a battery panel 20 that is suitable for an outdoor-installed battery panel 20 that requires more frequent maintenance than an indoor-installed battery panel 20.

[0050] <Other embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present invention.

[0051] (1) In the above embodiment, the uninterruptible power supply 10 is for outdoor use, but it may also be for indoor use.

[0052] (2) In the above embodiment, the battery panel 20 and the power conversion panel 100 are separate bodies, but the battery panel 20 and the power conversion panel 100 may be integrated.

[0053] (3) In the above embodiment, the input / output unit 30, the parallel unit 40, and the storage battery unit 70 are arranged on the battery panel 20 in this order from the bottom up, but the arrangement of the units 30, 40, and 70 may be different from that in the embodiment.

[0054] (4) In the above embodiment, the lightning arrester 36 is installed in the input / output unit 30. The lightning arrester 36 is an additional component and may be omitted. The same applies to the fourth breaker 35D. [Explanation of symbols]

[0055] 10 Uninterruptible power supply 20 Battery panel 30 Input / Output Unit 40 parallel units 70A~70G storage battery unit 80 First cabinet 100 Power conversion board 110 Second cabinet 150A~150E Power Converter L1 1st pathway L2 Secondary pathway L3 Third route (bypass route)

Claims

1. A battery panel used in an uninterruptible power supply, A storage battery unit; an input / output unit having an input terminal for AC input, an output terminal for AC output, and a breaker for cutting off input and output; a parallel unit for switching AC outputs to the output terminals; a housing that houses the storage battery unit, the input / output unit, and the parallel unit, the input / output unit has a bypass path that connects the input terminal to the output terminal without passing through the parallel unit by switching the breaker; The parallel unit is a battery panel that is separate from the input / output unit and can be attached to and detached from the housing.

2. The battery panel according to claim 1, The parallel unit is disposed above the input / output unit inside the housing.

3. The battery panel according to claim 1 or 2, the parallel unit includes a circuit board and a casing that houses the circuit board; The casing includes an intermediate wall that divides the interior of the casing into front and rear sections, the intermediate wall is located behind the input / output unit in a front-rear direction of the battery panel, a first region of the casing in front of the intermediate wall that does not accommodate the circuit board, and a second region of the casing in rear of the intermediate wall that accommodates the circuit board; A wiring connector is attached to the front surface of the intermediate wall, The battery panel has a bottom wall of the casing provided with through holes for wiring corresponding to the connectors of the intermediate wall.

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