Power supply device

Abstract

A power supply device in which a plurality of storage batteries are housed in multiple layers in the height direction, the storage batteries including a first storage battery configured so as to include: a first region provided in a substantially horizontal direction; and a second region including the first region and formed thicker than the first region in the height direction. A second storage battery adjacent to the first storage battery in the height direction is disposed so as to be offset in the depth direction of the power supply device so as to be disposed on the upper side or the lower side of the first region that does not include the second region. The distance between the bottom surface of the first storage battery and the bottom surface of the second storage battery in the height direction can be configured to be smaller than the thickness dimension of the second region of the storage battery.

Description

Technical Field

[0001] The present disclosure relates to a power supply device. Background Art

[0002] Japanese Patent Application Publication No. 2001-015090 discloses a technology related to a battery storage device consisting of a battery storage box capable of storing multiple batteries and a storage box storage body capable of storing multiple battery storage boxes. The battery storage device is structured so that a fixed and roughly rectangular battery storage box containing batteries is stored in the battery storage device. Summary of the Invention

[0003] In Japanese Patent Application Laid-Open No. 2001-015090, the battery storage box has a substantially rectangular parallelepiped shape, and a plurality of substantially rectangular parallelepiped battery storage boxes can be housed in the battery storage device.

[0004] However, when the batteries being stored are recycled products from other applications, particularly battery packs used in motor vehicles, there are cases where even the same battery pack has areas of varying thickness. In such cases, if these batteries are stored in multiple layers (or stages) in the height direction to match the thicker areas of the battery pack, the overall height increases, raising the center of gravity and potentially reducing shock resistance.

[0005] In view of the above circumstances, the present disclosure aims to provide a power supply device capable of suppressing the height of the center of gravity and improving shock resistance even when batteries having portions with different thicknesses are housed in multiple layers.

[0006] Means used to solve problems

[0007] A power supply device according to a first aspect of the present disclosure is a power supply device that accommodates a plurality of storage batteries in multiple layers in the height direction. The storage batteries include a first storage battery, the first storage battery being configured to include: a first region arranged in a substantially horizontal direction; and a second region that includes the first region and is formed thicker in the height direction than the first region. In the power supply device, a second storage battery adjacent to the first storage battery in the height direction is arranged so as to be staggered in the depth direction of the power supply device, such that the second storage battery is arranged above or below the first region that does not include the second region. The distance in the height direction between the bottom surfaces of the first storage battery and the second storage battery can be configured to be smaller than the thickness dimension of the second region.

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

[0009] In the power supply device, a second storage battery adjacent to a first storage battery in the height direction is arranged so as to be staggered in the depth direction of the power supply device, such that the second storage battery is positioned above or below a first region that does not include the second region. This allows 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 to be arranged to be smaller than the thickness of the second region.

[0010] As a comparative example, consider a case where the first and second batteries are arranged so that the distance between the bottom surfaces of the first and second batteries is greater than the thickness of the second region of the first battery. For example, the second battery is arranged above the second region of the first battery. Compared to such a case, the present disclosure allows for a reduction in the height of the first and second batteries in the power supply device.

[0011] That is, in the power supply device of the first embodiment, for example, even if the second battery is provided with a fourth region (so-called thick-walled portion) that is thicker in the height direction than the third region provided in the substantially horizontal direction, the batteries can be staggered in the depth direction of the power supply device so that the second region of the first battery and the fourth region of the second battery do not overlap in the vertical direction.

[0012] 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, this power supply unit can reduce the overall height of the batteries stored in multiple layers. As a result, the center of gravity of the power supply unit can be lowered, improving the shock resistance of the power supply unit housing the batteries. Furthermore, while the "first region" is positioned substantially horizontally, its top surface need not necessarily be flat and may also have irregularities.

[0013] The power supply device of the second embodiment of the present invention is provided with at least two groups of a pair of attachments in the power supply device of the first embodiment, wherein the pair of attachments extend along the depth direction of the power supply device body and respectively support two end portions of the battery which are approximately perpendicular to the insertion and withdrawal direction of the battery, the pair of attachments are formed to be shorter than the depth dimension of the power supply device body, and the two groups of attachments are arranged at adjacent positions in the height direction and are arranged to be staggered in the depth direction of the power supply device.

[0014] The power supply device of the second aspect includes at least two sets of a pair of attachments extending in the depth direction of the power supply device and supporting both ends of the battery substantially perpendicular to the direction in which the battery is inserted and removed.

[0015] Here, the pair of accessories is shorter than the depth dimension of the power supply unit main body, and the at least two sets of accessories are arranged adjacent to each other in the height direction and staggered in the depth direction of the power supply unit. This allows the first and second storage batteries, which are adjacent to each other in the height direction, to be arranged with staggered positions in the depth direction of the power supply unit.

[0016] A power supply device according to a third aspect of the present disclosure is the power supply device according to the first aspect, further comprising an inlet and outlet for allowing the battery to be taken in and out substantially horizontally along the depth direction, the inlet and outlet being provided on one end side of the power supply device body in the depth direction.

[0017] The power supply device of the third aspect has an inlet and outlet for allowing the battery to be taken in and out substantially horizontally along the depth direction. The inlet and outlet is provided at one end side of the power supply device in the depth direction, and the battery is taken in and out of the power supply device through the inlet and outlet.

[0018] A power supply device according to a fourth aspect of the present disclosure is the power supply device according to the third aspect, wherein the inlet and outlet are provided on one end side and the other end side in the depth direction of the power supply device body.

[0019] In the power supply device of the fourth aspect, the inlet and outlet are provided at one end and the other end of the power supply device in the depth direction. Thus, in the case of batteries arranged so as to be staggered in the depth direction along the height direction, the so-called thick-walled portion can be positioned toward the inlet and outlet. This facilitates the insertion and removal of batteries from the power supply device, improving operability.

[0020] The power supply device of the fifth embodiment of the present disclosure is, in the power supply device of the first embodiment, configured such that the second storage battery includes: a third region provided in the substantially horizontal direction; and a fourth region including the third region and formed thicker than the third region in the height direction, wherein the second region and the fourth region of the first storage battery are arranged so as not to overlap in the upper and lower directions.

[0021] In the power supply device of the fifth aspect, the second storage battery is configured to include a third region and a fourth region. The third region is provided substantially horizontally, and the fourth region, including the third region, is formed thicker than the third region in the height direction.

[0022] The second region of the first battery and the fourth region of the second battery, which serve as so-called thick-walled portions, are arranged so as not to overlap vertically. This arrangement reduces the overall height of the batteries stored in multiple layers in the power supply device, compared to a comparative example in which the second region of the first battery and the fourth region of the second battery are arranged vertically overlapping.

[0023] As a result, in the power supply device that is equipped with a storage battery, the center of gravity can be lowered, and the shock resistance can be improved. In addition, the "3rd zone" is provided in the substantially horizontal direction, but the upper surface need not necessarily be formed into a flat shape, and may also be formed with concavo-convex.

[0024] A power supply device according to a sixth aspect of the present disclosure is the power supply device according to the fifth aspect, wherein the second region is arranged on the inner side of the power supply device body in the depth direction, and the fourth region is arranged on the front side of the power supply device body in the depth direction.

[0025] In the power supply device of the sixth embodiment, the second area of ​​the first battery is arranged on the inner side of the power supply device body, and the fourth area of ​​the second battery is arranged on the near front side of the power supply device body. As a result, mass balance can be achieved in the front and rear of the power supply device in the depth direction, and the shock resistance of the power supply device can be improved.

[0026] As described above, the power supply device of the present disclosure can suppress the height of the center of gravity and improve the earthquake resistance even when batteries having portions with different thicknesses are accommodated in multiple layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic perspective view showing the power supply device according to this embodiment.

[0028] Figure 2 This is a schematic side sectional view showing a state where a plurality of battery packs are housed in the power supply device of this embodiment.

[0029] Figure 3 This is a schematic perspective view showing a battery pack housed in the power supply device of this embodiment.

[0030] Figure 4 This is a schematic perspective view showing another battery pack provided in the power supply device of this embodiment.

[0031] Description of Reference Numerals

[0032] 10Battery pack storage device

[0033] 11, 11A, 11B, 11C, 11D battery packs (batteries)

[0034] 12 cabinet (power supply unit main body)

[0035] 13, 13A, 13B base (first region, third region)

[0036] 15, 15A, 15B thick wall parts (second and fourth areas)

[0037] 42 Entrance and Exit

[0038] 48 Attachments

[0039] 50 Attachments

[0040] 56 battery pack (battery) DETAILED DESCRIPTION

[0041] Hereinafter, a power supply device according to an embodiment of the present disclosure will be described with reference to the drawings.

[0042] (Composition of Power Supply Unit)

[0043] First, the configuration of a power supply device according to an embodiment of the present disclosure will be described.

[0044] Figure 1 Figure 2 shows a battery pack storage device 10 serving as a power supply unit in this embodiment. The battery pack storage device 10 comprises a rectangular box-shaped housing (power supply unit body) 12. The framework of the battery pack storage device 10 comprises beam members, such as pillar members 14 extending vertically within the housing 12, and lower and upper beam members 16 and 18 extending longitudinally within the housing 12. While these members are shown as rectangular parallelepipeds, channel steel, H-steel, and the like may be used.

[0045] The column members 14 are provided at corners of the battery pack housing device 10 . The lower ends of adjacent column members 14 are bridged by a lower beam member 16 , and the upper ends of adjacent column members 14 are bridged by an upper beam member 18 .

[0046] In addition, a plurality of lower beam members 20 are provided along the width direction of the battery pack storage device 10 between a pair of lower beam members 16 that are provided along the depth direction of the battery pack storage device 10 and face each other. In addition, a plurality of upper beam members 22 are provided along the width direction of the battery pack storage device 10 between a pair of upper beam members 18 that are provided along the depth direction of the battery pack storage device 10 and face each other.

[0047] Furthermore, in the present embodiment, four pillar members 24 , 26 , 28 , and 30 , for example, are respectively provided standing between the pillar members 14 disposed front and rear in the depth direction of the battery pack storage device 10 .

[0048] 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 walls 36, 38, and an inner wall portion 40. A battery pack 11 (see FIG. 1 ) that can be used as a storage battery is provided on the front side of the battery pack storage device 10. Figure 2 ) entrance and exit 42.

[0049] In addition, an opening and closing door (not shown) is provided at the entrance and exit 42, and the battery pack storage device 10 can be opened and closed through the opening and closing door. In other words, if the opening and closing door is closed, the battery pack storage device 10 becomes a closed space. Therefore, in the battery pack storage device 10, when the entrance and exit 42 is open, the battery pack 11 is inserted into the battery pack 10 via the dedicated clamp 43 (see FIG. Figure 2 ) enters and exits the battery pack containment device 10 through the entrance and exit 42 in a substantially horizontal direction.

[0050] In addition, Figure 1 In order to make the structure inside the battery pack storage device 10 clear, the lower wall 32, the upper wall 34, the pair of side walls 36, 38, and the inner wall 40 are shown with transparent plates, but these wall materials do not need to be transparent.

[0051] Here, a plurality of fixing holes 44 are provided in the column members 24, 26, 28, and 30 along the height direction, and fasteners 46 such as bolts can be fixed through the fixing holes 44. Attachments 48 and 50 can be fixed to the column members 24, 26, 28, and 30.

[0052] The attachments 48 and 50 are formed shorter than the depth dimension of the battery pack storage device 10, for example. The attachment 48 is extended substantially horizontally relative to the pillar members 26, 28, and 30. Meanwhile, the attachment 50 is extended substantially horizontally relative to the pillar members 24, 26, and 28.

[0053] In the present embodiment, four pillar members 24 , 26 , 28 , and 30 are respectively provided standing between the pillar members 14 arranged front and rear in the depth direction of the battery pack storage device 10 . However, a single pillar member may be provided between the pillar members 14 .

[0054] The attachments 48 and 50 are formed into a substantially L-shaped structure using, for example, steel plates and include two mutually orthogonal fixing pieces 52 and 54. One fixing piece 52 can be fixed to the pillar members 24, 26, 28, and 30, while the other fixing piece 54 can be fixed to the battery pack 11.

[0055] In this embodiment, the attachment 48 is fixed to the pillar members 26 , 28 , 30 , and the attachment 50 is fixed to the pillar members 24 , 26 , 28 . Thus, the attachments 48 , 50 are arranged in a state of being staggered front and rear in the depth direction along the height direction of the battery pack storage device 10 .

[0056] That is, in this embodiment, if Figure 1 、 Figure 2 As shown, the attachment 48 is arranged on the back side of the battery pack storage device 10, and the attachment 50 is arranged on the front side of the battery pack storage device 10. The battery pack 11 is supported by the attachments 48 and 50, respectively.

[0057] Therefore, in this embodiment, for example, the battery packs 11A and 11B, the battery packs 11B and 11C, and the battery packs 11C and 11D that are adjacent in the height direction can be arranged in a state where they are offset in the depth direction.

[0058] Here, if Figure 3 As shown, the battery pack 11 is configured to include: a base portion (first region, third region) 13 disposed in a generally horizontal direction and having a generally rectangular plate shape when viewed in plan; and thick-walled portions (second region, fourth region) 15 that include the base portion 13 and are formed in the height direction to be thicker than the base portion 13. In this embodiment, the "base portion" is generally rectangular plate-shaped with a generally flat top surface, but this is not limiting and may also have irregularities formed on the top surface.

[0059] Flanges 17 extend outward from both widthwise ends of the battery pack 11. Although not shown, the battery pack 11 is mounted via these flanges 17 to a pair of rockers extending in the vehicle longitudinal direction at both widthwise ends of the vehicle floor panel.

[0060] While the flange portion 17 is in contact with the attachments 48 and 50, they are fastened together via fasteners (not shown) to fix the battery pack 11 to the attachments 48 and 50. Figure 2 , the shape of the battery pack 11 is shown in a simplified manner.

[0061] (Functions and effects of power supply devices)

[0062] Next, the operation and effects of the power supply device according to the embodiment of the present disclosure will be described.

[0063] In this embodiment, if Figure 1 、 Figure 2As shown, a plurality of battery packs 11 are stored in multiple layers in the height direction in the battery pack storage device 10. The battery pack storage device 10 also has an access port 42, which allows the battery packs 11 to be taken in and out in a substantially horizontal direction via a dedicated jig 43.

[0064] The battery pack storage device 10 is formed longer in the depth direction than the dimension in the insertion and removal direction of the battery pack 11. Furthermore, in the battery pack storage device 10, battery packs 11 adjacent in the height direction can be arranged in a state of being offset in the depth direction (described later).

[0065] In this embodiment, the battery pack storage device 10 is formed longer in the depth direction than the dimension of the battery packs 11 in the insertion and removal direction. This allows battery packs 11 adjacent in the height direction to be arranged with their depths offset. Therefore, in this embodiment, the battery packs 11 can be offset in the depth direction so that the thick-walled portions 15 provided on the battery packs 11 do not overlap vertically in the height direction.

[0066] As a result, in this embodiment, the overall height of the battery packs 11 stored in multiple layers can be reduced compared to a comparative example (not shown) in which the thick-walled portions 15 are stacked one above the other in the height direction. Therefore, in this embodiment, the center of gravity of the battery pack storage device 10 can be lowered, improving shock resistance.

[0067] Furthermore, in this embodiment, the battery pack storage device 10 is configured to include 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 shorter than the depth dimension of the battery pack storage device 10. 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.

[0068] That is, in this embodiment, the attachments 48 and 50 are arranged so as to be staggered front-to-back along the height direction relative to the depth direction of the battery pack storage device 10. Thus, in this embodiment, by securing the battery pack 11 to the attachments 48 and 50, the battery pack 11 can be stored in a state staggered front-to-back along the height direction relative to the depth direction of the battery pack storage device 10.

[0069] Although not shown, stoppers may be provided at the inner ends of the attachments 48 and 50. That is, when the battery pack 11 is accommodated in the battery pack accommodating device 10, the battery pack 11 abuts against the stoppers, thereby restricting movement of the battery pack 11.

[0070] Here, the content of shifting the battery packs 11 in the depth direction will be described in detail.

[0071] In this embodiment, as described above, the attachment 48 is disposed on the inner side of the battery pack storage device 10, and the attachment 50 is disposed near the front of the battery pack storage device 10. Furthermore, the attachment 48 and the attachment 50 are disposed so as to be staggered front to back along the height direction of the battery pack storage device 10 and in the depth direction of the battery pack storage device 10. The attachment 48 disposed on the inner side of the battery pack storage device 10 is disposed at the lowest level (lowest stage) of the battery pack storage device 10.

[0072] The battery packs 11 are sequentially housed from the lower layer (lower stage) of the battery pack housing device 10 . Therefore, the battery pack 11A is fixed to the attachment 48 in the lowest layer of the battery pack housing device 10 with the thick portion 15A facing the back side of the battery pack housing device 10 .

[0073] An attachment 50 is provided above the attachment 48 and is positioned near the front of the battery pack storage device 10. Thus, the battery pack 11B is secured to the attachment 50 above the battery pack 11A, with the base 13B overlapping the base 13A of the battery pack 11A in plan view and the thick portion 15B facing the near front of the battery pack storage device 10.

[0074] As described above, in the battery pack storage device 10, battery packs 11A and 11B that are adjacent in the height direction are arranged so as to be offset in the depth direction of the battery pack storage device 10. This allows the battery packs 11A and 11B to be arranged so that the distance (H1) between the bottom surface of the battery pack 11A and the bottom surface of the adjacent battery pack 11B is smaller than the thickness (H2) of the thick wall portion 15B of the battery pack 11B (H2 > H1). The same applies to battery packs 11C, 11D, and so on.

[0075] 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 arranged to be larger than the thickness dimension (H2) of the thick wall portion 15B of the battery pack 11B.

[0076] That is, in this embodiment, the battery packs 11A and 11B adjacent in the height direction are arranged in a staggered state in the depth direction of the battery pack storage device 10 so that the thick wall portion 15A of the battery pack 11A and the thick wall portion 15B of the battery pack 11B do not overlap vertically.

[0077] ​Thus, in this embodiment, battery packs 11 adjacent in height are arranged so that their bases 13 overlap when viewed in plan, and their thick-walled portions 15 do not overlap vertically. Furthermore, these thick-walled portions 15 are arranged alternately toward the rear and near the front of the battery pack storage device 10. This reduces the overall height of the battery packs 11 placed in the battery pack storage device 10.

[0078] Furthermore, in this embodiment, the thick-walled portions 15 of vertically adjacent battery packs 11 are arranged alternately on the inner side and the near-front side of the battery pack storage device 10. This allows for a balanced mass between the front and rear sides of the battery pack storage device 10, thereby improving the shock resistance of the battery pack storage device 10 housing the battery packs 11.

[0079] Furthermore, in this embodiment, the entrance 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 enters and exits the battery pack storage device 10 through the entrance 42 , but the present invention is not limited thereto.

[0080] For example, although not shown, an inlet and outlet may be provided at one end and the other end in the depth direction of the battery pack storage device 10. Thus, in a battery pack 11 arranged so as to be staggered front to back in the depth direction of the battery pack storage device 10 along the height direction, the thick wall portion 15 can be provided on the inlet and outlet side.

[0081] As a result, the battery pack 11 can be easily inserted and removed from the battery pack storage device 10, improving workability. Since the mass of the thick portion 15 is often greater than that of the base 13, the center of gravity of the battery pack 11 is often located on the thick portion 15 side. Therefore, placing the thick portion 15 side closer to the entrance and exit makes it easier to insert and remove the battery pack 11 from the battery pack storage device 10.

[0082] <Supplementary Explanation of the Above-mentioned Embodiment>

[0083] In the above embodiment, the flange portion 17 of the battery pack 11 is described as being fixed to the attachments 48 and 50. However, this flange portion 17 is not necessarily required and may be provided on only one side in the width direction of the battery pack 11. Furthermore, depending on the battery pack 11, the flange portion 17 may not be formed. In particular, in the case of a stationary storage battery, for example, in which the flange portion 17 is not formed, both ends of the battery pack 11 in the width direction are fixed to the attachments 48 and 50.

[0084] Moreover, in this embodiment, the accessories 48 and 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 wall portion 15 of the battery pack 11 can be arranged in a state of being staggered in the depth direction with respect to the battery packs 11 adjacent in the height direction.

[0085] That is, since at least the thick-walled portions 15 of the battery packs 11 adjacent in the height direction do not overlap in the vertical direction, the attachments 48 and 50 may have substantially the same dimensions as the battery pack housing device 10 in the depth direction.

[0086] In this embodiment, the battery pack 11 is a storage battery, and a plurality of storage batteries are housed in the battery pack housing 10. In this embodiment, battery packs 11 having partially different heights can be housed, but the heights do not necessarily need to be partially different.

[0087] For example, of course, even if the battery pack 56 (see Figure 4 ) is not provided with a thick wall portion 15 (refer to Figure 3 ), can also be accommodated in the battery pack accommodation device 10. Moreover, for example, even a reused battery used for purposes other than vehicle batteries can also be accommodated in the battery pack accommodation device 10.

[0088] Furthermore, in this embodiment, the battery pack storage device 10 is enclosed. This allows the battery pack storage device 10 to be protected from wind and rain even when it is installed outdoors. However, this is not limiting. In other words, depending on the location of the battery pack storage device 10, the battery pack storage device 10 does not necessarily need to be enclosed.

[0089] While one embodiment of the present disclosure has been described above, the present disclosure is not limited to this embodiment, and one embodiment and various modifications may be appropriately combined for use. Of course, the present disclosure may be implemented in various forms without departing from the spirit of the present disclosure.

[0090] <Note>

[0091] Furthermore, the following structures may be appropriately combined to form the vehicle frame member of the present disclosure.

[0092] (Composition 1)

[0093] A power supply device houses a plurality of storage batteries arranged in multiple layers in a height direction, the storage batteries including a first storage battery, the first storage battery being configured to include: a first region arranged in a substantially horizontal direction; and a second region including the first region and formed thicker in the height direction than the first region; a second storage battery adjacent to the first storage battery in the height direction is arranged so as to be staggered in the depth direction of the power supply device, such that the second storage battery is arranged above or below the first region excluding the second region; and the height distance between the bottom surfaces of the first storage battery and the second storage battery can be configured to be smaller than the thickness of the second region.

[0094] (Composition 2)

[0095] It is provided with at least two groups of a pair of accessories, wherein the pair of accessories extends along the depth direction of the power supply device body and respectively supports the two ends of the battery which are approximately perpendicular to the input and output direction of the battery. The pair of accessories is formed to be shorter than the depth dimension of the power supply device body, and the at least two groups of accessories are arranged at adjacent positions in the height direction and are arranged to be staggered in the depth direction of the power supply device.

[0096] (Composition 3)

[0097] An inlet and outlet is provided for allowing the battery to be taken in and out substantially horizontally along the depth direction, and the inlet and outlet is provided on one end side of the power supply device body in the depth direction.

[0098] (Composition 4)

[0099] The inlet and outlet are provided on one end side and the other end side of the power supply device body in the depth direction.

[0100] (Composition 5)

[0101] The second storage battery is configured to include: a third region provided in the substantially horizontal direction; and a fourth region including the third region and formed thicker than the third region in the height direction, wherein the second region and the fourth region of the first storage battery are arranged so as not to overlap vertically.

[0102] (Composition 6)

[0103] The second region is arranged on the inner side of the power supply device main body in the depth direction, and the fourth region is arranged on the front side of the power supply device main body in the depth direction.

Claims

1. A power supply device that houses a plurality of storage batteries in multiple layers in the height direction. The battery includes a first battery, and the first battery is configured to include: a first region provided in a substantially horizontal direction; and a second region including the first region and formed thicker than the first region in the height direction, In the power supply device, the second storage battery adjacent to the first storage battery in the height direction is arranged so as to be staggered in the depth direction of the power supply device so as to be arranged above or below the first region excluding the second region, and the height-direction distance between the bottom surface of the first storage battery and the bottom surface of the second storage battery can be arranged to be smaller than the thickness dimension of the second region of the storage battery.

2. The power supply device according to claim 1, The power supply device includes at least two sets of a pair of attachments, each of which extends along the depth direction of the power supply device body and supports both ends of the battery substantially orthogonal to the direction in which the battery is inserted and removed. The pair of accessories is formed shorter than a depth dimension of the power supply device body, and the at least two sets of accessories are arranged at adjacent positions in the height direction and are arranged to be offset in the depth direction of the power supply device.

3. The power supply device according to claim 1, The power supply device has an inlet and outlet for allowing the battery to be taken in and out substantially horizontally along the depth direction. The inlet and outlet are provided at one end side in the depth direction of the power supply device body.

4. The power supply device according to claim 3, The inlet and outlet are provided at one end side and the other end side in the depth direction of the power supply device body.

5. The power supply device according to claim 1, The second storage battery is configured to include: a third region provided in the substantially horizontal direction; and a fourth region including the third region and formed thicker than the third region in the height direction. The second region and the fourth region of the first storage battery are arranged so as not to overlap vertically.

6. The power supply device according to claim 5, The second region is arranged on the inner side of the power supply device main body in the depth direction, and the fourth region is arranged on the front side of the power supply device main body in the depth direction.

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