Energy storage device

Abstract

The present invention provides an energy storage device that can reduce the number of insulating panels fastened to the enclosure on the inside of a hinged door. [Solution] The energy storage device comprises multiple battery packs, a box-shaped housing in which the multiple battery packs are stacked vertically and housed, and a hinged door provided on the first surface of the housing for inserting and removing the multiple battery packs. When the hinged door is closed, it is fastened to the housing.

Description

Technical Field

[0001] This disclosure relates to a power storage device.

Background Art

[0002] Patent Document 1 discloses a stationary power storage device in which a plurality of battery packs are stacked vertically and housed in a box-shaped casing.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors have developed a power storage device in which a hinged door is provided in the casing to take in and out the battery packs. In this power storage device, from the viewpoint of safety, an insulating panel is fastened to the casing inside the hinged door so as to avoid unintentional contact when the hinged door is opened. However, since the insulating panel is large, there is a problem that it takes time to remove and attach it during maintenance inside the power storage device.

[0005] This disclosure has been made in view of such circumstances, and provides a power storage device capable of reducing an insulating panel fastened to a casing inside a hinged door.

Means for Solving the Problems

[0006] A power storage device according to one aspect of this disclosure is a plurality of battery packs, a box-shaped casing in which the plurality of battery packs are stacked and housed in the vertical direction, and a hinged door provided on a first surface of the casing for taking in and out the plurality of battery packs, When the hinged door is closed, the leading edge of the hinged door is fastened to the housing.

[0007] In the energy storage device according to this disclosure, when a hinged door provided on the first surface of the housing through which multiple battery packs are inserted and removed is closed, the leading edge of the hinged door is fastened to the housing. This configuration reduces the number of insulating panels fastened to the housing on the inside of the hinged door.

[0008] A bracket may be fixed to the hinged door, and the hinged door may be fastened to the housing via the bracket.

[0009] The aforementioned hinged door is a first hinged door, which together with a second hinged door constitutes a double hinged door, and the second hinged door is not fastened to the housing when closed, and may further include an insulating panel that is detachably fastened to the housing on the inside of the second hinged door.

[0010] The housing further comprises a plurality of metal panels provided on a second surface facing the first surface via the plurality of battery packs, wherein the plurality of metal panels are detachably fastened to the housing, and the housing may have beams between the fastened plurality of metal panels.

[0011] Each of the plurality of battery packs comprises a substantially rectangular parallelepiped-shaped battery module and a protrusion projecting upward from one end of the battery module, and the plurality of battery packs may be stacked vertically and housed in the housing such that the protrusions are arranged alternately. [Effects of the Invention]

[0012] This disclosure provides an energy storage device that can reduce the number of insulating panels fastened to the housing on the inside of a hinged door. [Brief explanation of the drawing]

[0013] [Figure 1]It is a perspective view showing an electric storage device according to the first embodiment. [Figure 2] It is a perspective view showing an electric storage device according to the first embodiment. [Figure 3] It is a cross-sectional view showing the inside of an electric storage device according to the first embodiment. [Figure 4] It is a perspective view of the battery pack 20. [Figure 5] It is a perspective view showing an electric storage device according to the first embodiment. [Figure 6] It is a perspective view showing an electric storage device according to the first embodiment.

Mode for Carrying Out the Invention

[0014] Hereinafter, specific embodiments of the present disclosure will be described in detail with reference to the drawings. However, the present disclosure is not limited to the following embodiments. Also, for clarity of explanation, the following description and drawings are simplified as appropriate.

[0015] (First Embodiment) <Configuration of Electric Storage Device> First, referring to FIGS. 1 to 3, the configuration of the electric storage device according to the first embodiment will be described. FIG. 1 is a perspective view showing the electric storage device according to the first embodiment. FIG. 2 is a perspective view showing the electric storage device according to the first embodiment. FIG. 3 is a cross-sectional view showing the inside of the electric storage device according to the first embodiment.

[0016] Of course, the right-handed XYZ orthogonal coordinates shown in FIGS. 1 to 3 are for convenience in explaining the positional relationship of the components. In FIGS. 1 to 3, the normal positive Z-axis direction is the vertically upward direction, the XY plane is the horizontal plane, and they are common among the drawings.

[0017] The energy storage device according to this embodiment is an energy storage device that can be installed outdoors, for example. As shown in FIGS. 1 and 2, the energy storage device includes a housing 10. Further, as shown in FIG. 3, the energy storage device includes a plurality of battery packs 20 inside the housing 10. Furthermore, as shown by the two-dot chain line in FIG. 3, each battery pack 20 includes a controller 30 on the negative X-axis side. In this embodiment, nine battery packs 20 are accommodated in the housing 10. However, if there are a plurality of them, the number of battery packs 20 is not limited in any way.

[0018] As shown in FIGS. 1 and 2, the housing 10 is in the shape of a rectangular parallelepiped, that is, box-shaped, and is composed of an upper surface portion 11, a bottom surface portion 12, a front surface portion 13, a rear surface portion 14, and a pair of side surface portions 15a and 15b. The housing 10 is composed of a metal plate such as a steel plate, for example.

[0019] As shown in FIG. 1, double-opening front opening doors FD1 and FD2 are provided on the front surface portion 13 of the housing 10. As shown in FIG. 1, the front opening door FD1 has the end portion on the side surface portion 15a side of the front surface portion 13 as a rotation axis, and is an opening door for an operator to access the battery pack 20, such as taking in and out the battery pack 20 shown in FIG. 3, connecting and disconnecting the wiring between the battery pack 20. On the other hand, the front opening door FD2 has the end portion on the side surface portion 15b side of the front surface portion 13 as a rotation axis, and is an opening door for an operator to access the controller 30, such as taking in and out the controller 30 shown in FIG. 3, connecting and disconnecting the wiring between the controller 30. Details of the front opening doors FD1 and FD2 will be described later.

[0020] As shown in FIG. 2, a rear opening door RD and three metal panels MP1, MP2, and MP3 are provided on the rear surface portion 14 of the housing 10. The rear opening door RD has the end portion on the side surface portion 15b side of the rear surface portion 14 as a rotation axis, and is an opening door for accessing the controller 30 shown in FIG. 3. That is, the rear opening door RD is arranged opposite to the front opening door FD2 provided on the front surface portion 13.

[0021] The rear hinged door RD is a standard hinged door that can be easily opened by rotating the doorknob when it is closed. In other words, when the rear hinged door RD is closed, it is not fastened to the rear portion 14 of the housing 10. For this reason, an insulating panel (not shown) is provided on the inside of the rear hinged door RD, which is detachably fastened to the rear portion 14 of the housing 10. The insulating panel prevents the operator from inadvertently coming into contact with the controller 30 or the like when opening the rear hinged door RD.

[0022] Each of the metal panels MP1, MP2, and MP3 is fitted into a rectangular opening provided in the rear portion 14 of the housing 10 and is also removably fastened to the rear portion 14 of the housing 10 by bolts BT. Here, the metal panels MP1, MP2, and MP3 are arranged in order from top to bottom at predetermined intervals and are positioned opposite the front opening door FD1 provided on the front portion 13. Therefore, the battery pack 20 can be accessed by removing the metal panels MP1, MP2, and MP3.

[0023] On the rear portion 14 of the housing 10, beams BM1 and BM2 are provided between the metal panels MP1, MP2, and MP3. Thus, in the energy storage device according to this embodiment, since beams BM1 and BM2 are provided on the rear portion 14 of the housing 10 and the metal panels MP1, MP2, and MP3 are fastened together, seismic resistance is improved. Furthermore, since the metal panels MP1, MP2, and MP3 are fastened to the housing 10, there is no need to provide insulating panels inside the metal panels MP1, MP2, and MP3 to prevent accidental contact, thus reducing the number of insulating panels. Furthermore, the number of metal panels is not limited to three; any number of panels is acceptable.

[0024] Alternatively, the upper edges of each opening into which the metal panels MP1, MP2, and MP3 are fitted may be configured to support the upper edges of each metal panel MP1, MP2, and MP3. With such a configuration, when fastening the metal panels MP1, MP2, and MP3, the worker can fasten them to the rear portion 14 of the housing 10 without having to support the metal panels MP1, MP2, and MP3.

[0025] The battery pack 20 is, for example, a lithium-ion battery and is a battery pack for use in a vehicle. Here, Figure 4 is a perspective view of the battery pack 20. As shown in Figure 4, the battery pack 20 comprises a battery module 21 and a protruding portion 22. As shown in Figure 4, the battery module 21 has a roughly rectangular parallelepiped shape. The battery module 21 is the main body of the battery pack 20 and is composed of multiple cell stacks arranged side by side, for example, in the X-axis direction or the Y-axis direction.

[0026] As shown in Figure 4, the protrusion 22 is provided so as to protrude upward from one end of the battery module 21 in the Y-axis direction. Electrical equipment such as a relay circuit, fuse, and current sensor is housed in the protrusion 22.

[0027] Here, as shown in Figure 3, multiple battery packs 20 are stacked vertically (in the Z-axis direction) and housed in the housing 10, with the protruding portions 22 arranged alternately in the Y-axis direction. In other words, the multiple battery packs 20 are stacked vertically so that the protruding portions 22 extend outwards alternately. As a result, the height and center of gravity of the energy storage device are lowered, improving the seismic resistance of the energy storage device.

[0028] <Details of the front-opening doors for FD1 and FD2> Next, the details of the front hinged doors FD1 and FD2 will be described with reference to Figures 5 and 6. Figure 5 is a perspective view showing the energy storage device according to the first embodiment. Figure 6 is a perspective view showing the energy storage device according to the first embodiment.

[0029] As shown in Figure 5, the front hinged door (first hinged door) FD1 is fastened to the pillar PL of the front part 13 of the housing 10 by bolts BT when it is closed. In this state, the front hinged door FD1 will not open even if the door handle of the front hinged door FD1 is rotated.

[0030] As shown in Figure 6, when opening the front hinged door FD1, the worker needs to remove the bolt BT. Therefore, in the energy storage device according to this embodiment, there is no need to provide an insulating panel on the inside of the front hinged door FD1 to prevent accidental contact, thus reducing the number of insulating panels. In addition, in the energy storage device according to this embodiment, since the front hinged door FD1 is fastened to the housing 10, seismic resistance is improved.

[0031] In the front hinged door FD1 shown in Figures 5 and 6, brackets BR1 and BR2 are fixed to the upper and lower ends of the door edge side, respectively. Brackets BR1 and BR2 are then fastened to pillar PL by bolts BT. In other words, the front hinged door FD1 is fastened to the housing 10 via brackets BR1 and BR2. The position at which the front hinged door FD1 is fastened to the housing 10 is not particularly limited.

[0032] On the other hand, as shown in Figures 5 and 6, the front hinged door (second hinged door) FD2, like the rear hinged door RD, is a normal hinged door and can be easily opened by rotating the doorknob when it is closed. In other words, the front hinged door FD2 is not fastened to the front part 13 of the housing 10 when it is closed.

[0033] Therefore, an insulating panel IP is provided on the inside of the front hinged door FD2, which is detachably fastened to the front part 13 of the housing 10. The insulating panel IP prevents the operator from inadvertently coming into contact with the controller 30 or the like when opening the front hinged door FD2. The insulating panel IP is made of, for example, a transparent resin, and the inside of the housing 10 can be observed through the insulating panel IP.

[0034] Furthermore, the front hinged door FD2 may also be configured to be fastened to the pillar PL of the front part 13 of the housing 10 when closed, similar to the front hinged door FD1. This configuration improves seismic resistance and eliminates the need for insulating panels IP, further reducing the amount of insulating panels IP.

[0035] Similarly, the rear hinged door RD may also be fastened to the rear portion 14 of the housing 10 when closed. This configuration improves seismic resistance and eliminates the need for an insulating panel on the inside of the rear hinged door RD, further reducing the number of insulating panels.

[0036] This disclosure is not limited to the embodiments described above, and may be modified as appropriate without departing from its intent. [Explanation of Symbols]

[0037] 10 cabinets 11 Top part 12 Bottom part 13 Front part 14 Back section 15a, 15b side part 20 battery packs 21 Battery Modules 22 Protrusion 30 controllers BM1, BM2 beam BR1, BR2 Brackets BT Bolt FD1, FD2 Front hinged doors IP Insulated Panel MP1, MP2 metal panel PL Pillar RD Rear hinged door

Claims

1. Multiple battery packs, A box-shaped housing in which the aforementioned multiple battery packs are stacked vertically and housed, The housing includes a hinged door provided on the first side for inserting and removing the plurality of battery packs, When the hinged door is closed, the hinged door is fastened to the housing. Energy storage device.

2. A bracket is fixed to the aforementioned hinged door. The hinged door is fastened to the housing via the bracket. The energy storage device according to claim 1.

3. The aforementioned hinged door is a first hinged door, and together with the second hinged door, it constitutes a double hinged door. The second hinged door is not fastened to the housing when closed. The second hinged door further comprises an insulating panel that is removably fastened to the housing on the inside of the second hinged door, The energy storage device according to claim 1 or 2.

4. The housing further comprises a plurality of metal panels provided on a second surface facing the first surface via the plurality of battery packs, The plurality of metal panels are detachably fastened to the housing, The housing includes beams between the multiple metal panels that are fastened together. The energy storage device according to claim 1 or 2.

5. Each of the plurality of battery packs comprises a substantially rectangular parallelepiped-shaped battery module and a projection that protrudes upward from one end of the battery module. The plurality of battery packs are housed in the casing, stacked vertically so that the protruding portions are arranged alternately. The energy storage device according to claim 1 or 2.

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