Battery board used in uninterruptible power supply

Abstract

To provide a battery board that maintains the heat insulation performance of a storage battery unit while suppressing the power consumption of a heater.SOLUTION: A battery board 20 used in an uninterruptible power supply 10 includes: a housing 80; an insulation chamber 90 provided inside the housing and incorporating a heater 96; and a storage battery unit 70 housed in the insulation chamber 90. Further, an input / output unit and a parallel unit are disposed at a lower portion of the housing 80, and the insulation chamber is disposed at an upper portion of the housing 80. In addition, the heater is disposed at the bottom of the insulation chamber 90.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a battery panel used 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 parallel unit that switches the output, a power converter, etc. Patent Document 1 is an example of 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] A drop in temperature can cause a drop in performance of a battery unit or a functional shutdown. One way to prevent this is to use a heater to heat the entire battery panel and maintain the temperature of the battery unit. However, this requires heating a wide area, which consumes a lot of power.

[0005] An object of the present invention is to reduce the power consumption of the heater while maintaining the heat retention performance of the storage battery unit. [Means for solving the problem]

[0006] A battery panel used in an uninterruptible power supply comprises a housing, a heat-insulating chamber provided inside the housing and having a built-in heater, and a storage battery unit housed in the heat-insulating chamber. [Effects of the Invention]

[0007] The present invention can reduce the power consumption of the heater compared to when the entire housing is heated to keep it warm. [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] A perspective view showing the internal structure of the parallel unit [Figure 5] Perspective view of the uninterruptible power supply (front wall of the battery panel and top panel of the power conversion panel are omitted) [Figure 6] Uninterruptible Power Supply Circuit Diagram [Figure 7] Diagram showing the heat chamber and air circulation route [Figure 8] Vertical cross section of the housing [Figure 9] 1 is a perspective view of a mounting member and a storage battery unit; DETAILED DESCRIPTION OF THE INVENTION

[0009] (Outline of this embodiment) (1) A battery panel according to one embodiment of the present invention is for an uninterruptible power supply and comprises a housing, a heat-insulating chamber provided inside the housing and having a built-in heater, and a storage battery unit housed in the heat-insulating chamber.

[0010] According to the battery panel according to one embodiment of the present invention, the volume to be heated by the heater can be made smaller than when the entire battery panel is heated without providing a heat-retaining chamber inside the battery panel, and therefore the power consumption of the heater can be reduced.

[0011] (2) In the battery panel described in (1) above, the input / output unit and the parallel unit may be disposed in the lower part of the housing, and the heat-retaining chamber may be disposed in the upper part of the housing. Because heated air tends to rise, the heated air is less likely to come into contact with the input / output unit and the parallel unit. This makes it possible to suppress temperature increases in the input / output unit and the parallel unit.

[0012] (3) In the battery panel described in (1) or (2) above, the heater may be disposed at the bottom of the heat-retaining chamber. Because heated air tends to rise, the heat convection can heat the heat chamber evenly from the bottom to the top. This can reduce the temperature difference between the storage battery units housed in the heat-retaining chamber.

[0013] (4) In the battery panel according to any one of (1) to (3), the heat-retaining chamber may have a plurality of mounting members in the vertical direction, the mounting members may have horizontal support walls that support the bottom surfaces of the storage battery units, and the support walls of the mounting members may have vertically penetrating air holes at positions that avoid the storage battery units when viewed from the vertical direction. With this configuration, air heated by the heater circulates inside the heat-retaining chamber through the air holes, allowing the heater to heat the storage battery units housed in the heat-retaining chamber evenly.

[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 referred to as the X direction, the up-down direction as the Y direction, and the direction perpendicular to the paper surface as the Z direction. 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 Figure 5) is referred to as the front side, and the opposite side (the rear left side in Figure 5) is referred to as the rear side.

[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 metal housing 80 that houses these.

[0016] The housing 80 is made of, for example, metal. The housing 80 is box-shaped and long in the vertical direction (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. A heat-insulating panel is installed on the inner surface of the housing 80. The front wall 81 forms 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 fit inside a housing 80, which houses, in order from the bottom up, the input / output unit 30, parallel unit 40, and multiple (seven in this example) storage battery units 70A-70G. 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] 3, the input / output unit 30 is for inputting and outputting and blocking the input / output, and 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 to accommodate these. The input terminal 31 is a terminal connected to the power system, and the output terminal 32 is a terminal for outputting to a load.

[0019] Furthermore, a space for accommodating a transformer 25 is provided below the input / output unit 30 in the battery panel 20 .

[0020] 4 is a perspective view showing the internal structure of the parallel unit 40. The parallel unit 40 includes a circuit board 45, such as a parallel board, that switches AC output, a base 47 that supports the circuit board 45, and a casing 50, such as made of metal, that houses these components.

[0021] 5, 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 housing 110 with ventilation holes 145 and a plurality of power converters 150 housed in the housing 110, and is disposed on the lower side of the battery panel 20. In this embodiment, the battery panel 20 housing five power converters 150A to 150E is disposed on the lower part of the left side wall 82 of the battery panel 20.

[0022] 2. Circuit configuration of uninterruptible power supply 10 6 is a block diagram of the uninterruptible power supply 10. The uninterruptible power supply 10 includes, as its electrical configuration, an input / output unit 30, a parallel unit 40, a plurality of storage battery units 70 (a collective term for 70A to 70G), and a power conversion panel 100.

[0023] 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 .

[0024] The input terminal 31 is connected to one end (the left end in FIG. 6) 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. 6) of the first relay 41 via a second breaker 35B.

[0025] The other end (the right end in FIG. 6) of the second relay 42 is connected to the other end (the right end in FIG. 6) of the first relay 41. One end (the left end in FIG. 6) of the second relay 42 is connected to the power conversion panel 100. The power conversion panel 100 includes five power converters 150A to 150E connected in parallel.

[0026] Furthermore, seven storage battery units 70A to 70G are connected in parallel via a third breaker 35C to the power conversion panel 100. Each of the storage battery units 70A to 70G is a unit in which a plurality of battery cells are connected in series and parallel.

[0027] 6 shows only three of the power converters, 150A to 150C, and omits two, 150C and 150D, and also shows only three of the storage battery units, 70A to 70C, and omits 70D to 70G.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 3. Heat retention structure of storage battery unit 70 A drop in temperature can cause the performance of the storage battery unit 70 to decline or the unit to shut down due to protection functions. One way to prevent the performance decline or the unit to shut down due to protection functions of the storage battery unit 70 is to use the heater 96 to heat the entire battery panel to maintain the temperature of the storage battery unit 70. However, this method heats a wide area, which increases the power consumption of the heater 96.

[0034] Therefore, the battery panel 20 is configured to reduce the power consumption of the heater 96 by providing a heat-retaining chamber 90 for the storage battery unit inside the housing 80, thereby reducing the volume to be heated.

[0035] The following is a specific description of the configuration of the heat-retaining chamber 90. As shown in Fig. 7, the input / output unit 30 and the parallel unit 40 are arranged in the lower part of the housing 80, and the heat-retaining chamber 90 is arranged in the upper part of the housing 80.

[0036] The heat-retaining chamber 90 is a box-shaped chamber made of metal or other material, and has left and right side walls 90A and 90B, a bottom wall 90C, and a ceiling wall 90D. In addition, the front and rear panels are provided with detachable front and rear panels.

[0037] 8, metal mounting members 91 are installed in the vertical direction on the left side wall 90A to correspond to the seven storage battery units 70A to 70G. Similarly, metal mounting members 91 are installed in the vertical direction on the right side wall 90B.

[0038] 9, the mounting member 91 is L-shaped and has a horizontal plate-like support wall 92 and a vertical wall 93 that is perpendicular to the support wall 92. An inwardly bent flange 93A is provided at the upper end of the vertical wall 93.

[0039] Each of the storage battery units 70A to 70G can be supported horizontally within the heat-retaining chamber by supporting the left and right ends of the bottom surface of the storage battery unit 70 with left and right support walls 92. Note that Figures 7 and 8 show only two of the seven storage battery units 70A to 7G, storage battery units 70D and 70E, located in the fourth and fifth rows counting from the bottom.

[0040] A plurality of ventilation holes 92A that penetrate vertically are provided in the support wall 92. The ventilation holes 92A are provided at positions that avoid the storage battery units 70 when viewed from the top-bottom direction (Y direction). In this example, the ventilation holes 92A are rectangular and are formed at regular intervals in the front-to-back direction (Z direction).

[0041] The heat-retaining chamber 90 has a heater unit 95 at its bottom. The heater unit 95 is made up of a resistor-type heater 96 and a heater case 97. In this embodiment, the bottom wall of the heater case 97 serves as the bottom wall of the heat-retaining chamber 90.

[0042] Heated air tends to rise, so by placing heater unit 95 at the bottom of heat-retaining chamber 90, heat convection can be used to heat the heat evenly from the bottom to the top of heat-retaining chamber 90. This makes it possible to reduce the temperature difference between storage battery units 70A-70G housed in heat-retaining chamber 90.

[0043] As described above, the support wall 92 is formed with the ventilation holes 92A, and the air heated by the heater unit 95 passes through the ventilation holes 92A and circulates inside the heat-retaining chamber 90. Therefore, the storage battery units 70A-70G housed in the heat-retaining chamber 90 can be evenly heated by the heater unit 95.

[0044] 7 and 8, a fan 88 is attached to the ceiling wall 85 of the housing 80 of the battery panel 20. An upper void (duct) U1 is provided between the ceiling wall 85 of the housing 80 and the ceiling wall 90D of the heat-retaining chamber 90. Furthermore, a side void (duct) U2 is provided between the left side wall 82 of the housing 80 and the left side wall 90A of the heat-retaining chamber 90, and a side void (duct) U3 is provided between the right side wall 83 of the housing 80 and the right side wall 90B of the heat-retaining chamber 90.

[0045] The upper void U1, side void U2, and side void U3 constitute circulation paths U1 to U3 that circulate air inside the housing of the battery panel 20 while bypassing the heat-retaining chamber 90. By circulating the air through the circulation paths U1 to U3 while exchanging the air inside the housing with outside air using the fan 88, the input / output unit 30 and parallel unit 40 arranged below the heat-retaining chamber 90 can be kept at an appropriate temperature.

[0046] In this embodiment, as shown in FIG. 9, the side walls 90A and 90B of the heat-retaining chamber 90 are formed by stacking the vertical walls 93 of the mounting members 91 one above the other without any gaps.

[0047] By using the mounting members 91 to configure the side surfaces of the heat-retaining chamber 90, it is possible to reduce the number of sheet metal members and thereby lower costs. Note that reference numeral 99 shown in FIG. 8 denotes a frame for fixing the mounting members 91, and is installed at the four corners of the heat-retaining chamber 90.

[0048] 4.Effectiveness With the uninterruptible power supply 10 according to one embodiment of the present invention, the volume to be heated by the heater unit 95 can be made smaller than when the heat-retaining chamber 90 is not provided inside the battery panel 20 and the entire battery panel is heated. This makes it possible to reduce the power consumption of the heater unit 95. This is particularly suitable for an outdoor uninterruptible power supply 10 that is required to maintain performance even in low-temperature operating environments where temperature changes are large.

[0049] <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.

[0050] (1) In the above embodiment, the uninterruptible power supply 10 is for outdoor use, but it may also be for indoor use.

[0051] (2) In the above embodiment, the heater unit 95 is disposed at the bottom of the heat-retaining chamber 90. The heater unit 95 may be disposed at the side of the heat-retaining chamber 90. The number of heater units 95 is not limited to one, and may be multiple.

[0052] (3) In the above embodiment, the input / output unit 30 and the parallel unit 40 are disposed below the battery panel 20, and the heat-retaining chamber 90 is disposed above the battery panel 20. Alternatively, the heat-retaining chamber 90 may be disposed below the battery panel 20, and the input / output unit 30 and the parallel unit 40 may be disposed above the battery panel 20. [Explanation of symbols]

[0053] 10 Uninterruptible power supply 20 Battery panel 70A~70G storage battery unit 80 cabinets 90 Warming room 91 Mounting material 92 Supporting wall 92A Ventilation hole 93 Vertical Wall 95 Heater Unit 96 Heater 97 Heater Case

Claims

1. A battery panel used in an uninterruptible power supply, The housing and a heat-retaining chamber provided inside the housing and having a built-in heater; a storage battery unit housed in the heat-retaining chamber.

2. The battery panel according to claim 1, an input / output unit and a parallel unit are disposed in a lower portion of the housing; The battery panel has the heat-retaining chamber disposed on top of the housing.

3. The battery panel according to claim 1 or 2, The heater is disposed at the bottom of the heat-retaining chamber.

4. The battery panel according to claim 1 or 2, The heat-retaining chamber has a plurality of mounting members in the vertical direction, the mounting member has a horizontal support wall that supports a bottom surface of the storage battery unit, The battery panel has a vertically penetrating ventilation hole formed in the support wall of the mounting member at a position that avoids the storage battery unit when viewed from above and below.

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