Power supply device

Abstract

To provide a power supply device capable of suppressing the height of the center of gravity and improving earthquake resistance when storage batteries having portions with different thicknesses are housed in a plurality of stages.SOLUTION: A battery pack storage device 10 is formed so as to be longer in the depth direction than the dimension in the insertion / removal direction of battery packs 11, and the battery packs 11 adjacent in the height direction are arranged in a state of being offset in the depth direction. This makes it possible to reduce the overall height of the battery packs 11 stored in multiple layers compared to when the battery packs 11 are arranged with their thick-walled portions 15 overlapping each other vertically in the height direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a power supply device. [Background technology]

[0002] The following Patent Document 1 discloses technology relating to a battery storage device that is composed of a battery storage box that can store multiple batteries and a storage box housing that can store multiple battery storage boxes, and the structure is such that a standard, approximately rectangular battery storage box that stores batteries is housed in the battery storage device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-015090 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described prior art, the battery housing box has a substantially rectangular parallelepiped shape, and a plurality of standard, substantially rectangular parallelepiped battery housing boxes can be housed in the battery housing device.

[0005] However, in the above-mentioned prior art, when the storage batteries to be stored are reused products used for various other purposes, particularly storage battery packs used in automobiles, there are cases where the same storage batteries having different thicknesses are stored. In this case, if the storage batteries are stored in multiple layers in the height direction to match the thicker parts of the storage battery packs, the overall height increases, and the center of gravity becomes higher, which may reduce earthquake resistance.

[0006] In consideration of the above, the present invention aims to provide a power supply device that can reduce the height of the center of gravity and improve earthquake resistance even if storage batteries with different thicknesses are stored in multiple layers. [Means for solving the problem]

[0007] The power supply device of the invention described in claim 1 is a power supply device that houses multiple storage batteries in multiple stages in the vertical direction, and includes a first storage battery that is configured to include a first region that is arranged in a substantially horizontal direction and a second region that includes the first region and is formed to be thicker in the vertical direction than the first region, and a second storage battery that is adjacent to the first storage battery in the vertical direction is arranged offset in the depth direction of the power supply device so as to be located above or below the first region, and can be arranged so that the distance between the bottom surface of the first storage battery and the bottom surface of the second storage battery that is adjacent to the first storage battery in the vertical direction is smaller than the thickness dimension of the second region.

[0008] In the power supply device according to the invention of claim 1, a plurality of storage batteries are housed in multiple stages in the height direction. The first storage battery is configured to include a first region and a second region. The first region is provided in a substantially horizontal direction, and the second region (so-called thick portion) is formed to be thicker in the height direction than the first region, including the first region.

[0009] Here, in the present invention, the second storage battery adjacent to the first storage battery in the height direction is shifted in the depth direction of the power supply device so as to be located above or below the first base unit, thereby enabling the first storage battery to be positioned so that the distance between the bottom surface of the first storage battery and the bottom surface of the second storage battery adjacent to the first storage battery in the height direction is smaller than the thickness dimension of the second region.

[0010] As a comparative example, an example of a case where the first and second storage batteries are arranged so that the distance between the bottom surface of the first storage battery and the bottom surface of the second storage battery is greater than the thickness dimension of the second section of the first storage battery is a case where the second storage battery is arranged above the second section of the first storage battery. Compared to such a case, the present invention makes it possible to reduce the height dimensions of the first and second storage batteries.

[0011] In other words, in the present invention, even if a fourth region (so-called thick portion) is provided in the second storage battery that is thicker in the vertical direction than the third region that is provided in the approximately horizontal direction, the storage batteries can be shifted in the depth direction of the power supply device so that the second region of the first storage battery and the fourth region of the second storage battery do not overlap vertically.

[0012] As a result, in the present invention, the overall height of the multi-tiered batteries in the power supply device can be lowered compared to a comparative example in which the second region of the first battery and the fourth region of the second battery are stacked vertically in the height direction. As a result, the center of gravity of the power supply device can be lowered, making it possible to improve earthquake resistance. Note that although the "first region" is arranged in a substantially horizontal direction, the top surface does not necessarily have to be flat and may have an uneven surface.

[0013] The power supply device according to the invention of claim 2 is the power supply device according to the invention of claim 1, The power supply unit is provided with a pair of attachments that extend along the depth direction of the power supply unit body and support both ends of the storage battery that are approximately perpendicular to the direction in which the storage battery is inserted and removed, and the pair of attachments are formed shorter than the depth dimension of the power supply unit body and are arranged at adjacent positions in the height direction, offset in the depth direction of the power supply unit.

[0014] The power supply device according to the invention of claim 2 includes a pair of attachments that extend along the depth direction of the power supply device and support both ends of the storage battery that are substantially perpendicular to the direction in which the storage battery is inserted and removed.

[0015] The pair of attachments are formed shorter than the depth dimension of the power supply device body and are arranged at adjacent positions in the height direction with a stagger in the depth direction of the power supply device, which makes it possible to arrange the first and second storage batteries adjacent in the height direction with a stagger in the depth direction of the power supply device.

[0016] The power supply device of the invention described in claim 3 is the power supply device of the invention described in claim 1, which has an entrance / exit for inserting and removing the storage battery approximately horizontally along the depth direction, and the entrance / exit is provided at one end side of the depth direction of the power supply device main body.

[0017] The power supply device according to the invention of claim 3 has an entrance for inserting and removing the storage battery substantially horizontally along the depth direction. This entrance is provided on one end side of the power supply device in the depth direction, and the storage battery is inserted and removed from the power supply device through this entrance.

[0018] The power supply device according to the invention of claim 4 is the power supply device according to the invention of claim 3, wherein the entrances are provided at one end and the other end in the depth direction of the power supply device main body.

[0019] In the power supply device according to the invention of claim 4, the entrances are provided at one end and the other end in the depth direction of the power supply device, so that the thicker portion of the storage batteries, which are arranged at different positions in the depth direction along the height direction, can be provided at the entrance side. This makes it easier to insert and remove the storage batteries from the power supply device, improving workability.

[0020] The power supply device of the invention described in claim 5 is the power supply device of the invention described in claim 1, wherein the second storage battery is configured to include a third region arranged in the approximately horizontal direction and a fourth region that includes the third region and is formed thicker in the vertical direction than the third region, and the second region and the fourth region are arranged so that they do not overlap vertically.

[0021] In the power supply device according to the invention of claim 5, the second storage battery is configured to include a third region and a fourth region. The third region is provided in a substantially horizontal direction, and the fourth region is formed to include the third region and to be thicker in the height direction than the third region.

[0022] In the present invention, the second region of the first storage battery and the fourth region of the second storage battery, which are so-called thick-walled portions, are arranged so as not to overlap vertically. As a result, the height of the entire storage batteries housed in multiple tiers in the power supply device can be made lower in the present invention than in a comparative example in which the second region of the first storage battery and the fourth region of the second storage battery are arranged so as to overlap vertically in the height direction.

[0023] As a result, the center of gravity of the power supply device can be lowered, and earthquake resistance can be improved. Although the "third region" is provided in a substantially horizontal direction, the upper surface does not necessarily have to be flat and may have an uneven surface.

[0024] The power supply device of the invention described in claim 6 is the power supply device of the invention described in claim 5, wherein the second area is located at the back side of the power supply device main body and the fourth area is located at the front side of the power supply device main body.

[0025] In the power supply device of the invention described in claim 6, the second area of ​​the first storage battery is located at the back of the power supply device body, and the fourth area of ​​the second storage battery is located at the front of the power supply device body, thereby making it possible to balance the mass between the front and back in the depth direction of the power supply device and improving earthquake resistance. [Effects of the Invention]

[0026] As described above, the power supply device according to the present invention can reduce the height of the center of gravity and improve earthquake resistance even if storage batteries having portions of different thicknesses are housed in multiple tiers. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a schematic perspective view showing a power supply device according to an embodiment of the present invention; [Figure 2] 1 is a schematic cross-sectional side view showing a state in which a plurality of battery packs are housed in a power supply device according to an embodiment of the present invention; [Figure 3]1 is a schematic perspective view showing a battery pack housed in a power supply device according to an embodiment of the present invention; [Figure 4] FIG. 10 is a schematic perspective view showing another battery pack provided in the power supply device according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, a power supply device according to an embodiment of the present invention will be described with reference to the drawings.

[0029] (Power supply configuration) First, the configuration of a power supply device according to an embodiment of the present invention will be described.

[0030] 1 shows a battery pack receiving device 10 as a power supply device according to this embodiment. The battery pack receiving device 10 is a rectangular box-shaped housing (power supply device main body) 12, and the framework of the battery pack receiving device 10 is configured to include beam members such as pillar members 14 extending in the up-down direction of the housing 12, and lower beam members 16 and upper beam members 18 extending in the front-rear direction of the housing 12. Although these members are shown in the shape of a rectangular parallelepiped, channel steel, H-beam steel, etc. may be used, for example.

[0031] The pillar members 14 are provided at the corners of the battery pack storage device 10, and the lower ends of adjacent pillar members 14 are bridged by a lower beam member 16, and the upper ends of adjacent pillar members 14 are bridged by an upper beam member 18.

[0032] A plurality of lower beam members 20 are bridged along the width direction of the battery pack accommodating device 10 between a pair of opposing lower beam members 16 that are respectively provided along the depth direction of the battery pack accommodating device 10. A plurality of upper beam members 22 are bridged along the width direction of the battery pack accommodating device 10 between a pair of opposing upper beam members 18 that are respectively provided along the depth direction of the battery pack accommodating device 10.

[0033] Furthermore, in this embodiment, for example, four pillar members 24, 26, 28, and 30 are erected between the pillar members 14 disposed at the front and rear of the battery pack receiving device 10 in the depth direction.

[0034] In this embodiment, the battery pack storage device 10 is configured to include a lower wall portion 32, an upper wall portion 34, a pair of side wall portions 36, 38, and a rear wall portion 40, and an entrance / exit 42 is provided on the front side of the battery pack storage device 10 so that a battery pack 11 (see Figure 2) serving as a storage battery can enter and exit.

[0035] Furthermore, the entrance 42 is provided with an opening / closing door (not shown), which allows the interior of the battery pack accommodating device 10 to be opened and closed. In other words, when the opening / closing door is closed, the battery pack accommodating device 10 becomes an enclosed space. Therefore, with the entrance 42 of the battery pack accommodating device 10 open, the battery pack 11 is inserted into or removed from the battery pack accommodating device 10 through the entrance 42 in a substantially horizontal direction using a dedicated jig 43 (see FIG. 2 ).

[0036] In FIG. 1, the lower wall 32, the upper wall 34, the pair of side walls 36, 38, and the rear wall 40 are shown as transparent plates so that the internal configuration of the battery pack storage device 10 can be seen, but these wall materials do not need to be transparent.

[0037] Here, the pillar members 24, 26, 28, 30 are each provided with a plurality of fixing holes 44 along the height direction, and fasteners 46 such as bolts can be fixed through the fixing holes 44. Attachments 48, 50 can be fixed to the pillar members 24, 26, 28, 30.

[0038] The attachments 48, 50 are formed to be shorter than the depth dimension of the battery pack receiving device 10, for example, and the attachment 48 is bridged (extended) across the pillar members 26, 28, 30 in a substantially horizontal direction. On the other hand, the attachment 50 is bridged across the pillar members 24, 26, 28 in a substantially horizontal direction.

[0039] In this embodiment, four pillar members 24, 26, 28, and 30 are erected between pillar members 14 arranged at the front and rear of the battery pack receiving device 10 in the depth direction, but there may be only one pillar member between pillar members 14.

[0040] The attachments 48, 50 are formed, for example, from a steel plate in a generally L-shape and include two mutually perpendicular fixing pieces 52, 54. One fixing piece 52 can be fixed to the pillar members 24, 26, 28, 30, and the other fixing piece 54 can be fixed to the battery pack 11.

[0041] In this embodiment, the attachment 48 is fixed to the pillar members 26, 28, and 30, and the attachment 50 is fixed to the pillar members 24, 26, and 28, so that the attachments 48 and 50 are arranged in a state where they are shifted forward and backward in the depth direction along the height direction of the battery pack storage device 10.

[0042] 1 and 2, in this embodiment, the attachment 48 is disposed at the rear side within the battery pack accommodating device 10, and the attachment 50 is disposed at the front side within the battery pack accommodating device 10. The battery packs 11 are supported by the attachments 48 and 50, respectively.

[0043] As a result, in this embodiment, for example, battery packs 11A and 11B, battery packs 11B and 11C, and battery packs 11C and 11D that are adjacent in the height direction can be arranged with a shift in the depth direction.

[0044] 3, the battery pack 11 is configured to include a base portion (first region, third region) 13 that is disposed in a substantially horizontal direction and has a substantially rectangular plate shape in a plan view, and a thick portion (second region, fourth region) 15 that includes the base portion 13 and is formed thicker in the height direction than the base portion 13. Note that in this embodiment, the "base portion" has a substantially rectangular plate shape and has a substantially flat upper surface, but is not limited to this and may have an uneven surface.

[0045] Furthermore, flanges 17 protrude outward from both widthwise ends of the battery pack 11. Although not shown, the battery pack is attached via these flanges 17 to a pair of rockers that extend along the front-to-rear direction of the vehicle at both widthwise ends of the vehicle floor panel.

[0046] With this flange portion 17 in contact with the attachments 48, 50, the attachments are fastened together via fasteners (not shown), and the battery pack 11 is fixed to the attachments 48, 50. Note that the shape of the battery pack 11 is shown in a simplified form in Figure 2.

[0047] (Actions and Effects of the Power Supply Unit) Next, the operation and effects of the power supply device according to the embodiment of the present invention will be described.

[0048] 1 and 2, in this embodiment, a plurality of battery packs 11 are housed in multiple stages in the height direction in the battery pack housing device 10. The battery pack housing device 10 also has an entrance 42 through which the battery packs 11 are inserted and removed in a substantially horizontal direction via a dedicated jig 43.

[0049] The battery pack receiving device 10 is formed so that its depth is longer than the dimension in the insertion / removal direction of the battery packs 11. In the battery pack receiving device 10, the battery packs 11 adjacent in the height direction can be arranged with a shift in the depth direction (described later).

[0050] In this embodiment, the battery pack receiving device 10 is formed so that it is longer in the depth direction than the dimension in the insertion / removal direction of the battery packs 11, which allows the battery packs 11 adjacent in the height direction to be arranged in a state where they are offset in the depth direction. Therefore, in this embodiment, the battery packs 11 can be offset in the depth direction so that the thick portions 15 provided on the battery packs 11 do not overlap each other vertically in the height direction.

[0051] As a result, in this embodiment, although not shown as a comparative example, the height of the entire battery packs 11 accommodated in multiple layers can be made lower than when the battery packs 11 are arranged with the thick portions 15 stacked vertically in the height direction. Therefore, in this embodiment, the center of gravity of the battery pack accommodation device 10 can be lowered, and earthquake resistance can be improved.

[0052] In this embodiment, the battery pack receiving device 10 includes a plurality of pillar members 24, 26, 28, and 30 and attachments 48 and 50. In this embodiment, the attachments 48 and 50 are formed to be shorter than the depth dimension of the battery pack receiving device 10, and the attachment 48 is fixed to the pillar members 26, 28, and 30, and the attachment 50 is fixed to the pillar members 24, 26, and 28.

[0053] That is, in this embodiment, the attachments 48, 50 are arranged in a state where they are shifted along the height direction from front to back in the depth direction of the battery pack receiving device 10. In this way, in this embodiment, by fixing the battery packs 11 to the attachments 48, 50, respectively, the battery packs 11 can be received in a state where they are shifted along the height direction from front to back in the depth direction of the battery pack receiving device 10.

[0054] Although not shown, a stopper may be provided at the innermost end of the attachments 48, 50. That is, when the battery pack 11 is accommodated in the battery pack accommodation device 10, the battery pack 11 may come into contact with the stopper to restrict movement of the battery pack 11.

[0055] Here, the details of shifting the battery pack 11 in the depth direction will be specifically described.

[0056] In this embodiment, as described above, the attachment 48 is arranged at the rear side within the battery pack accommodating device 10, and the attachment 50 is arranged at the front side within the battery pack accommodating device 10. The attachment 48 and the attachment 50 are arranged along the height direction of the battery pack accommodating device 10, shifted from each other in the front-rear direction in the depth direction of the battery pack accommodating device 10, and the attachment 48 arranged at the rear side within the battery pack accommodating device 10 is provided at the lowest level of the battery pack accommodating device 10.

[0057] The battery packs 11 are accommodated in the battery pack accommodating device 10 in order from the bottom up. Therefore, the battery pack 11A is fixed to the attachment 48 at the bottom of the battery pack accommodating device 10 so that the thick portion 15A is at the back side of the battery pack accommodating device 10.

[0058] An attachment 50 is provided above the attachment 48, and the attachment 50 is disposed on the front side of the battery pack accommodating device 10. Therefore, the battery pack 11B is fixed to the attachment 50 above the battery pack 11A such that the thick portion 15B is on the front side of the battery pack accommodating device 10 with the base portion 13B overlapping the base portion 13A of the battery pack 11A in a plan view.

[0059] In this way, in the battery pack accommodating device 10, the battery packs 11A and 11B adjacent in the height direction are arranged in a state where they are offset in the depth direction of the battery pack accommodating device 10. This allows the battery packs 11A to be arranged so that the distance (H1) between the bottom surface of the battery pack 11A and the bottom surface of the battery pack 11B adjacent in the height direction to the battery pack 11A is smaller than the thickness dimension (H2) of the thick portion 15B of the battery pack 11B (H2>H1). The same applies to the battery packs 11C, 11D, etc.

[0060] As a comparative example, the distance (H1) between the bottom surface of the battery pack 11A and the bottom surface of the battery pack 11B is larger than the thickness dimension (H2) of the thick portion 15B of the battery pack 11B.

[0061] That is, in this embodiment, the battery packs 11A and 11B that are adjacent in the vertical direction are arranged in a shifted state in the depth direction of the battery pack accommodating device 10 so that the thick portion 15A of the battery pack 11A and the thick portion 15B of the battery pack 11B do not overlap each other vertically.

[0062] In this manner, in this embodiment, the bases 13 of the battery packs 11 adjacent in the height direction overlap in a plan view, and the thick portions 15 are arranged so as not to overlap vertically. The thick portions 15 are arranged alternately at the rear and front sides within the battery pack receiving device 10. This allows the overall height of the battery packs 11 to be reduced.

[0063] In this embodiment, the thick portions 15 of the battery packs 11 adjacent in the height direction are arranged alternately at the rear and front sides within the battery pack receiving device 10. This allows for a balance of mass between the front and rear of the battery pack receiving device 10, thereby improving earthquake resistance.

[0064] On the other hand, in this embodiment, the entrance / exit 42 of the battery pack storage device 10 is provided at one end side in the depth direction of the battery pack storage device 10, and the battery pack 11 is inserted into and removed from the battery pack storage device 10 through the entrance / exit 42, but this is not limited to this.

[0065] ​For example, although not shown, an entrance and an exit may be provided on one end side and the other end side in the depth direction of the battery pack accommodating device 10. This allows the thick portion 15 side to be provided on the entrance and exit side of the battery packs 11 that are arranged in a state of being shifted forward and backward in the depth direction of the battery pack accommodating device 10 along the height direction.

[0066] As a result, the battery pack 11 can be easily inserted and removed from the battery pack receiving device 10, improving workability. Since the thick-walled portion 15 often has a larger mass than the base portion 13, the center of gravity of the battery pack 11 is often located on the thick-walled portion 15 side. For this reason, it is easier to insert and remove the battery pack 11 from the battery pack receiving device 10 when the thick-walled portion 15 side is located on the entrance / exit side.

[0067] <Supplementary explanation of the above embodiment> In the above embodiment, it has been described that the flange portion 17 of the battery pack 11 is fixed to the attachments 48, 50. However, the flange portion 17 is not necessarily required and may be provided on only one side of the battery pack 11 in the width direction. Also, some battery packs 11 do not have a flange portion 17. In particular, when the flange portion 17 is not formed, such as in a stationary storage battery, both ends of the battery pack 11 in the width direction are fixed to the attachments 48, 50.

[0068] Furthermore, in this embodiment, the attachments 48, 50 are formed shorter than the depth dimension of the battery pack storage device 10, but this is not limited to this as long as the thick portion 15 of the battery pack 11 can be positioned in a state where it is shifted in the depth direction relative to the battery packs 11 adjacent in the height direction.

[0069] In other words, the attachments 48, 50 may have substantially the same dimension as the battery pack receiving device 10 in the depth direction, as long as the thick portions 15 of the battery packs 11 adjacent in the height direction do not interfere with each other.

[0070] In this embodiment, the battery pack 11 is a storage battery, and a plurality of storage batteries are housed in the battery pack housing device 10. In this embodiment, battery packs 11 with partially different height dimensions can be housed, but the height dimensions do not necessarily have to be partially different.

[0071] For example, a battery pack 56 (see FIG. 4) that does not have the thick portion 15 (see FIG. 3) can of course be accommodated in the battery pack accommodating device 10. Furthermore, for example, a reused battery that has been used for purposes other than a vehicle battery may also be accommodated in the battery pack accommodating device 10.

[0072] In this embodiment, the inside of the battery pack accommodating device 10 is closed. This makes it possible to suppress the effects of wind and rain inside the battery pack accommodating device 10 even when the battery pack accommodating device 10 is placed outdoors, but this is not limitative. In other words, depending on the placement location of the battery pack accommodating device 10, the battery pack accommodating device 10 does not necessarily need to be closed.

[0073] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment may be appropriately combined with various modified examples, and the present invention may of course be embodied in various forms as long as it does not deviate from the gist of the present invention.

[0074] <Additional Notes> The vehicle frame member according to the present invention may be formed by appropriately combining the following configurations.

[0075] (Configuration 1) A power supply device that houses multiple storage batteries in multiple stages in the vertical direction, includes a first storage battery that is configured to include a first region that is arranged in a substantially horizontal direction and a second region that includes the first region and is formed to be thicker in the vertical direction than the first region, and a second storage battery that is adjacent to the first storage battery in the vertical direction is arranged offset in the depth direction of the power supply device so as to be located above or below the first region, and can be arranged so that the distance between the bottom surface of the first storage battery and the bottom surface of the second storage battery that is adjacent to the first storage battery in the vertical direction is smaller than the thickness dimension of the second region.

[0076] (Configuration 2) The power supply unit is provided with a pair of attachments that extend along the depth direction of the power supply unit body and support both ends of the storage battery that are approximately perpendicular to the direction in which the storage battery is inserted and removed, and the pair of attachments are formed shorter than the depth dimension of the power supply unit body and are arranged at adjacent positions in the height direction, offset in the depth direction of the power supply unit.

[0077] (Configuration 3) The power supply device has an entrance for inserting and removing the storage battery, which is provided substantially horizontally along the depth direction, and the entrance is provided on one end side of the power supply device body in the depth direction.

[0078] (Configuration 4) The entrances are provided at one end and the other end in the depth direction of the power supply device main body.

[0079] (Configuration 5) The second storage battery is configured to include a third region arranged in the approximately horizontal direction and a fourth region that includes the third region and is formed thicker in the vertical direction than the third region, and the second region and the fourth region are arranged so that they do not overlap vertically.

[0080] (Configuration 6) The second area is located at the rear side of the power supply device body, and the fourth area is located at the front side of the power supply device body. [Explanation of symbols]

[0081] 10 Battery pack storage device (power supply device) 12 Box (power supply unit body) 11 Battery pack (storage battery) 11A battery pack (storage battery) 11B Battery pack (storage battery) 11C battery pack (storage battery) 11D Battery pack (storage battery) 13 Base (1st area, 3rd area) 13A Base (1st area, 3rd area) 13B Base (1st area, 3rd area) 15 Thick part (2nd area, 4th area) 15A Thick wall part (2nd area, 4th area) 15B Thick part (2nd area, 4th area) 42 Entrance / Exit 48 Attachment 50 attachments 56 Battery pack (storage battery)

Claims

1. A power supply device that accommodates multiple storage batteries in multiple stages in the height direction, a first storage battery configured to include a first region provided in a substantially horizontal direction and a second region including the first region and formed thicker in a height direction than the first region; A power supply device in which a second storage battery adjacent to the first storage battery in the height direction is shifted in the depth direction of the power supply device so as to be located above or below the first area, and the distance between the bottom surface of the first storage battery and the bottom surface of the second storage battery adjacent to the first storage battery in the height direction is smaller than the thickness dimension of the second area.

2. a pair of attachments extending along the depth direction of the power supply device body and supporting both ends of the storage battery that are substantially perpendicular to the insertion / removal direction of the storage battery; 2. The power supply device according to claim 1, wherein the pair of attachments are formed shorter than the depth dimension of the power supply device body and are arranged at positions adjacent to each other in the height direction so as to be offset in the depth direction of the power supply device.

3. an entrance for inserting and removing the storage battery substantially horizontally along the depth direction; The power supply device according to claim 1 , wherein the entrance is provided at one end side in the depth direction of the power supply device body.

4. The power supply device according to claim 3 , wherein the entrance is provided at one end side and the other end side in a depth direction of the power supply device body.

5. the second storage battery is configured to include a third region provided in the substantially horizontal direction and a fourth region that includes the third region and is formed thicker in a height direction than the third region, The power supply device according to claim 1 , wherein the second region and the fourth region are arranged so as not to overlap one another vertically.

6. 6. The power supply device according to claim 5, wherein the second area is arranged at the rear side of the power supply device body, and the fourth area is arranged at the front side of the power supply device body.

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