JP5656724B2 - Power storage system - Google Patents

Description

  The present invention relates to a power storage system provided in a building and provided with a storage battery for storing electric power.

  In a house using a power storage system, a dead space of the house is effectively used as a storage space for the storage battery. For example, Patent Document 1 discloses a technology that uses an underfloor space as a storage battery installation location. Since the underfloor is ventilated by natural ventilation, it is well ventilated and has a relatively low ambient temperature, so that the storage battery can be radiated and cooled, and the generated and leaked gas can be discharged efficiently.

JP 2010-163744 A.

  However, in the above power storage system, a pedestal that moves with a storage battery is necessary, and on the ground under the floor, in order to smoothly run the heavy pedestal with the storage battery mounted, concrete finishing, rail laying, etc. Special construction is required, and the pedestal must have a structure that can be moved by attaching casters, resulting in high costs.

  There is also a method of suspending a truck with a storage battery on a traveling rail attached to the floor under the ceiling of the building. However, since the weight of the storage battery acts on the floor constantly, the floor is bent, etc. There is a risk of impact.

  In view of the above facts, an object of the present invention is to provide a power storage system in which a storage battery can be installed without special construction on the foundation and without affecting the building.

  The power storage system according to claim 1, wherein the power storage system includes a support frame that is mounted on an upright portion of a foundation and provided with a support portion that supports a storage battery outside in the width direction of the upright portion.

Next, the operation of the power storage system according to claim 1 will be described.
In the power storage system according to claim 1, the storage battery can be supported on the support portion of the support frame, and by mounting the support frame supporting the storage battery on the support portion on the upright portion of the foundation, the storage battery (weight) is It is supported on the foundation via a support frame.

  Since it is only necessary to mount the support frame that supports the storage battery on the upper part of the foundation, no special construction or the like is required on the ground below the floor. In addition, since the weight of the storage battery is supported by a sturdy foundation, the storage battery does not affect the building.

  According to a second aspect of the present invention, in the power storage system according to the first aspect, the support frame is formed so that a central portion is convex upward so as to straddle the upright portion, and the support frame is formed on both sides of the convex portion. Is provided.

Next, the operation of the power storage system according to claim 2 will be described.
In the power storage system according to the second aspect, the support frame is mounted on the upright portion so that the convex portion straddles the upright portion. By making the central part of the support frame convex upward, the support parts on both sides are positioned below the top of the convex part, and as a result, the center of gravity of the storage battery mounted on the support part is lowered. The support frame that supports the storage battery is preferable because it is stable in response to shaking such as an earthquake.

According to a third aspect of the present invention, in the power storage system according to the second aspect of the present invention, the power storage system includes an upper frame that holds an upper part of the storage battery, and the storage battery is installed between the upper frame and the support frame.

Next, the operation of the power storage system according to claim 3 will be described.
In the power storage system according to the third aspect, the upper part of the storage battery is pressed by the upper frame. For this reason. When the support frame supporting the storage battery is transported, lifted, or suspended, the storage battery can be prevented from falling off.

  According to a fourth aspect of the present invention, in the power storage system according to any one of the first to third aspects, a side wall extending upward is formed at a central portion of the support frame, and the side wall is formed on the side wall. The upper frame is detachably connected by a connecting member.

Next, the operation of the power storage system according to claim 4 will be described.
In the power storage system according to the fourth aspect, since the upper frame is detachably connected to the side wall by the connecting member, the connection between the side wall and the upper frame can be released as necessary. For example, when replacing the storage battery, the storage battery can be replaced by releasing the connection between the side wall and the upper frame by the connecting member and moving the upper frame upward.

  According to a fifth aspect of the present invention, in the power storage system according to the third or fourth aspect, the support frame and the upper frame are disposed below the lower surface level of the floor beam.

Next, the operation of the power storage system according to claim 5 will be described.
The lower surface of the floor beam is located below the floor material arranged on the floor beam, and has a height dimension of the floor beam from the lower surface (level) of the floor beam to the lower surface of the floor material. There is space.

  For this reason, if the upper frame holding the storage battery is positioned below the lower surface level of the floor beam, the upper frame has the space above, so when replacing the storage battery, the upper frame Can be moved upward.

  According to a sixth aspect of the present invention, in the power storage system according to any one of the first to fifth aspects, a waterproof connector is used as a connector of an electric cable connected to a terminal of the storage battery.

Next, the operation of the power storage system according to claim 6 will be described.
In the power storage system according to the sixth aspect, since the waterproof connector of the electric cable is connected to the terminal of the storage battery, there is no possibility of short circuit or leakage even if the storage battery is splashed with water or submerged under the floor.

  A seventh aspect of the present invention is the power storage system according to any one of the first to sixth aspects, wherein a plurality of the storage batteries are connected in series, and a terminal and a terminal of the start end of the storage battery in series connection are connected. Each terminal is connected to one end of an electric cable for drawing in the house.

  Next, the operation of the power storage system according to claim 7 will be described.

  A plurality of the storage batteries are connected in series, and an electrical cable for in-home drawing is connected to each of the start terminal and terminal terminal of the storage battery in series connection. By connecting to the battery, the power of the storage battery can be sent to the device in the house. Note that the storage battery can be charged using an electric cable for in-home drawing.

According to an eighth aspect of the present invention, in the power storage system according to any one of the first to seventh aspects , the support frame has a protrusion that press-contacts the side surface of the upright portion .

Next, the operation of the power storage system according to claim 8 will be described.
In the power storage system according to claim 8, the protrusion of the support frame mounted on the upright portion is in pressure contact with the side surface of the upright portion. (Width direction of the upright part) is suppressed.

  As described above, the power storage system according to the first aspect has an excellent effect that no special construction is applied to the foundation and the building is not affected.

  The power storage system according to claim 2 has an excellent effect that the storage battery can be stably supported.

  The power storage system according to claim 3 has an excellent effect that the storage battery can be prevented from falling off.

  According to the power storage system of the fourth aspect, there is an excellent effect that replacement of the storage battery becomes easy.

  According to the power storage system of the fifth aspect, there is an excellent effect that the upper frame can be moved upward.

  According to the power storage system of the sixth aspect, it is possible to prevent a short circuit or leakage when the storage battery is splashed with water or submerged under the floor.

  According to the electrical storage system of Claim 7, the electric power of a storage battery can be transported to the electrical equipment in a house.

  According to the power storage system of the eighth aspect, it is possible to suppress the shift of the support frame.

(A) is sectional drawing of a pillar, (B) is sectional drawing of the electrical storage system which concerns on 1st Embodiment. It is a perspective view which shows the structure of the principal part of a unit building. FIG. 3A is a plan view of a power storage system having an upper frame, and FIG. 3B is a cross-sectional view of the power storage system (a cross-sectional view taken along line 3 (B) -3 (B) in FIG. 3A). (A) is sectional drawing of a waterproof connector, (B) is sectional drawing of the waterproof connector connected to the terminal of the storage battery. It is sectional drawing which shows the taking procedure of an electrical storage system. It is sectional drawing of the electrical storage system which shows the state which has removed the storage battery. It is sectional drawing of the electrical storage system which concerns on 2nd Embodiment. It is sectional drawing of the electrical storage system which concerns on 3rd Embodiment.

[First Embodiment]
Hereinafter, a first embodiment of a power storage system according to the present invention will be described with reference to FIGS.

FIG. 2 shows a part of a unit building 12 as an example of a building to which the power storage system according to the first embodiment of the present invention is applied.
In the unit building 12, a plurality of building units 14 are adjacent to each other in the girder direction (arrow X direction) and the wife direction (arrow Y direction) on the foundation structure 18 as an example of the foundation structure of the building provided on the ground 16. Are arranged and sequentially installed.

These building units 14 have a structure in which a frame is arranged in a box shape with a plurality of columns 20, a ceiling beam 22, and a floor beam 24 as an example of a building frame.
2 shows only the first floor, the building unit 14 may be arranged on the first floor building unit 14 to have two or more floors. Further, the configuration of the unit building 12 is not limited to the above configuration, and may be another box-shaped frame structure.

  As an example, the foundation structure 18 made of concrete reinforced with reinforcing bars is provided in a lattice shape on a frame-shaped outer foundation body 26 that forms the outer periphery of the foundation, and on the site inside the outer foundation body 26. An inner base body 28 is included. The inner base body 28 is formed lower than the outer base body 26 except for a portion that supports four columns.

  As shown in FIG. 1, the power storage system 30 of this embodiment includes a plurality of storage batteries 32 and a frame assembly 34 that supports these storage batteries 32. The frame assembly 34 includes a steel frame support frame 36 and an upper frame 38.

  The support frame 36 is mounted on the upper portion 28A of the inner base body 28 and extends in parallel with the vertical portion 28A from both sides in the width direction of the mounting surface 36A. The side surface 36B extends, the support surface 36C extends from the lower end of the side surface 36B to the outside in the width direction of the upright portion 28A, the lower flange portion 36D extends upward from the end portion of the support surface 36C, and rises upward from the upper surface of the mounting surface 36A. A pair of upper frame mounting surfaces 36E extending along the upper and lower ends of the pair of upper frame mounting surfaces 36E.

  The space dimension W1 (see FIG. 3B) between the one side surface 36B and the other side surface 36B is set slightly larger than the width dimension W0 (see FIG. 1B) of the upright portion 28A. .

  The mounting surface 36A, the side surface 36B, the support surface 36C, and the lower flange portion 36D are formed by bending a single steel plate, and have a U-shaped cross section formed by a pair of an upper frame attachment surface 36E and a connection surface 36F. The shape portion is formed by bending a single steel plate, and the lower end of the upper frame mounting surface 36E is joined to the mounting surface 36A by welding or the like.

  The support frame 36 is floated from the ground 16 so that the lower surface thereof is not in contact with the ground 16 under the floor while being mounted on the upper portion 28A of the inner base body 28.

  On the other hand, the upper frame 38 extends in parallel with the mounting surface 36A from the side surface 38A disposed along the upper frame mounting surface 36E of the support frame 36 and from the upper end of the side surface 38A to the side opposite to the upper frame mounting surface 36E side. The upper surface 38B is provided with an upper flange portion 38C extending downward from the end opposite to the side surface 38A side of the upper surface 38B, and is formed in a substantially L-shaped cross section as a whole.

  Nuts 42 for screwing bolts 40 to be described later are joined to the side surfaces 36B of the support frame 36 at two locations apart in the longitudinal direction by welding or the like. Further, a through hole 44 through which the bolt 40 is inserted into the joint portion of the nut 42 is formed in the side surface 36B.

On the other hand, a long hole 46 extending in the vertical direction is formed on the side surface 38A of the upper frame 38 so that the screw portion of the bolt 40 can be inserted (the head cannot be inserted).
The upper frame 38 is fixed to the support frame 36 by screwing and tightening the bolts 40 through which the long holes 46 are inserted into the nuts 42 of the support frame 36.

  As shown in FIG. 3, nuts 48 are joined to the lower surface of the coupling surface 36 </ b> F of the upper frame 38 at two locations separated in the longitudinal direction by welding or the like. Is formed. A suspension bolt (eye bolt) 52 is attached to the nut 48.

  The positions at which the two suspension bolts 52 are attached are set on the center line CL in the width direction of the frame assembly 34 and equidistant from the center of gravity G of the frame assembly 34 in order to balance the suspension. .

  The upper frame 38, the support frame 36, the bolt 40, the nut 42, the nut 48, the suspension bolt 52, and the like are subjected to rust prevention treatment such as plating, painting, coating, or the like.

As shown in FIG. 3, a plurality of storage batteries 32 are mounted on the support surface of the support frame 36 along the longitudinal direction, and the storage batteries 32 are pressed from above by an upper frame 38. Further, the storage battery 32 is held at the corners by the upper flange portion 38C of the upper frame 38 and the lower flange portion 36D of the support frame 36 so that the storage battery 32 does not fall out to the outside in the upright width direction. Of course, the plurality of storage batteries 32 are arranged evenly from the center of gravity G of the frame assembly 34 so that the power storage system 30 can be balanced.
Note that the suspension bolt 52 is disposed above the position of the center of gravity of the power storage system 30 on which the storage battery 32 is mounted in consideration of the balance at the time of lifting.

  Further, as shown in FIG. 1, in the power storage system 30 of the present embodiment, the upper frame 38 is positioned on the outer side in the width direction with respect to the floor beam 24 disposed along the inner base body 28 above the inner base body 28. The upper frame 38 and the support frame 36 are positioned below the lower surface level 24L of the floor beam 24. Therefore, a space in which at least the upper frame 38 can slide upward is provided between the upper frame 38 and the lower surface of the floor 90. In addition, the code | symbol 91 is a heat insulating material in the figure.

The storage battery 32 of this embodiment is provided with terminals 54 and 56 on the side surface.
In the present embodiment, a plurality of storage batteries 32 are connected in series by a connection cable 58, and among the plurality of storage batteries 32 connected in series, a terminal 54 (for example, a positive electrode) of the storage battery 32 on the start end side in series connection. The terminal 56 (for example, a negative pole) of the storage battery 32 on the terminal side is connected to an in-home electric cable 60 for in-home use.

  A waterproof connector 62 is attached to the ends of the connection cable 58 and the electrical cable 60 for drawing in the house.

  As shown in FIG. 4A, the waterproof connector 62 includes a metal terminal 66 connected to the end portion of the lead wire of the cord 64. The terminal 66 is made of rubber, synthetic resin, or the like partially opened. It is covered with a waterproof cap 68 made of an insulating elastic material.

  The waterproof cap 68 is in close contact with the outer peripheral portion of the cord 64 so that water does not enter the cap from between the cord 64 and the waterproof cap 68.

  An annular packing 70 is attached around the opening of the waterproof cap 68. The packing 70 can be formed of, for example, a flexible material such as a sponge-like material that does not allow water to permeate and has innumerable closed cells that have insulating properties, such as foamed rubber. If there are bubbles, it is not always necessary.

  For example, as shown in FIG. 4B, if a terminal 66 is attached to the terminal 54 of the storage battery 32 and the packing 70 of the waterproof cap 68 is brought into close contact with the insulating case 32A of the storage battery 32, the case 32A of the storage battery 32 Water does not enter the cap from between the waterproof cap 68.

  The structure of the waterproof connector 62 shown in FIG. 4 is an example, and a waterproof connector having another configuration may be used as long as water does not contact the terminals 54 and 56 of the storage battery 32.

(Function)
First, the manufacturing procedure of the electrical storage system 30 of this embodiment is demonstrated.
(1) The suspension bolt 52 is attached to the nut 48 of the support frame 36, and the plurality of storage batteries 32 are mounted on the support surface 36C of the support frame 36 (see FIG. 3).

  The upper frame 38 is placed on the storage battery 32, and the bolt 40 inserted through the long hole 46 of the upper frame 38 is screwed into the nut 42 of the support frame 36 and tightened. As a result, the storage battery 32 is pressed from above by the upper frame 38 and fixed in a state of being sandwiched between the support frame 36 and the upper frame 38. Further, since the lower flange portion 36E of the support frame 36 and the upper flange portion 38C of the upper frame 38 are in contact with the side portions of the storage battery 32, the storage battery 32 is detached from the frame assembly 34 during transportation or lifting work. Can be prevented.

  In addition, the storage battery 32 is arrange | positioned at intervals, and the bolt 40 can be clamp | tightened by inserting a tool from the clearance gap between the storage battery 32 and the storage battery 32. FIG.

(2) Connect the connection cable 58 and the electrical cable 60 for in-home drawing to the terminals 54 and 56 of the storage battery 32. In the power storage system 30 of the present embodiment, the storage batteries 32 are connected in series using the connection cable 58, but may be connected in parallel as necessary.
(3) The power storage system 30 is completed as described above.

Next, a procedure for attaching the power storage system 30 to the foundation structure 18 of the unit building 12 will be described.
(1) Pass a wire or attach a shackle to the suspension bolt 52, suspend the power storage system 30 with a crane, and transport it above the inner base body 28 (see FIG. 5).
Then, the power storage system 30 is lowered so that the mounting surface 36A is placed on the upper portion 28A of the inner base body 28.

  In the present embodiment, the power storage system 30 is only mounted on the rising portion 28A of the inner base body 28, and in particular, the power storage system 30 is not fixed to the inner base body 28 or the like using bolts or other members.

  Since the suspension bolts 52 are attached to the power storage system 30 of the present embodiment, the power storage system 30 having a heavy weight (for example, a total weight of 100 kg or more) can be easily obtained using a crane used when building the unit building 12. Can be transported and installed.

(2) Remove the wire (or shackle) from the suspension bolt 52, and then install the building unit 18 in the foundation structure 18.

(3) Thereafter, in the present embodiment, the electric cable 60 for drawing in the home of the power storage system 30 is drawn into the home via, for example, a gap between the pillars 20 and 20, and the power of the power storage system 30 is supplied to various electric devices. Can be used as a source. It goes without saying that the storage battery 32 can be charged using the electric cable 60 for drawing in the house.

  According to the power storage system 30 of the present embodiment installed in this manner, the weight of the storage battery 32 is supported by the sturdy foundation structure 18, so that the weight of the storage battery 32 does not act on the building body of the unit building 12. Therefore, the unit building 12 is not affected.

  In the power storage system 30 of the present embodiment, since the support surface 36C on which the storage battery 32 is mounted is located below the upper surface of the upright portion 28A, the upper surface of the upright portion 28A and the support surface on which the storage battery 32 is mounted. Compared to the case where 36C is the same height, the position of the center of gravity of the storage battery 32 is lowered and the storage system 30 can be balanced. That is, the stability of the storage system 30 is increased, and the storage system 30 when the storage system 30 is shaken by an earthquake or the like. A fall can be prevented.

When the storage battery 32 is replaced, as shown in FIG. 6, the storage battery 32 can be taken out by loosening the bolt 40 and sliding the upper frame 38 upward.
Since the power storage system 30 of the present embodiment is located below the lower surface of the floor girder 24, a sufficient space for allowing the upper frame 38 to slide upward can be provided above the upper frame 38.

  In order to facilitate the replacement work of the storage battery 32, it is preferable to provide an openable inspection port or the like on the floor 90 or the like in the vicinity of the power storage system 30.

  By the way, when there is underfloor flooding or the like, the storage battery 32 may be submerged or submerged. However, the terminals 54 and 56 of each storage battery 32 are all covered with the waterproof cap 68 of the waterproof connector 62 and thus short-circuited. There is no risk of electrical leakage.

  The suspension bolt 52 is necessary when lifting the power storage system 30 and is not necessary after installation, and may be removed after installation. Ordinarily, the suspension bolt 52 is not attached, and it may be attached when lifting. A hook may be attached instead of the suspension bolt 52, and a member (steel plate or the like) in which a wire or shackle is caught may be joined to the upper frame 38 by welding or the like. It is sufficient to open a through hole in 38. In any case, it is necessary to provide a suspension upper portion (a suspension bolt, a hook with a screw, a member in which a hole or a notch is formed, a through hole, etc.) for lifting the power storage system 30 with a crane or the like. Thereby, the some storage battery 32 can be supported by the inner base main body 28 at once. As described above, it is preferable that the power storage system 30 is provided with a suspended portion such as the suspension bolt 52, the nut 48, and the hook used when the power storage system 30 is lifted by a crane or the like above the center of gravity of the power storage system 30.

In the power storage system 30 of the present embodiment, the three surfaces (the back surface (the surface opposite to the terminal side), the top surface, and the bottom surface) of the storage battery 32 are brought into contact with the frame assembly 34 made of steel plate, so the frame assembly 34 is used as a heat sink. You can also
In the power storage system 30 of this embodiment, since the frame assembly 34 is floated from the ground 16, higher durability can be obtained as compared with the case where it is placed directly on the ground (soil) 16.

  In the power storage system 30 of this embodiment, since the plurality of storage batteries 32 are connected in series, a voltage higher than that of the single power storage system 30 can be taken out from the other end of the electrical cable 60 for in-home use.

[Second Embodiment]
Hereinafter, a second embodiment of the power storage system according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted.
FIG. 7 shows an example in which the power storage system 30 is attached to a foundation main body 74 of a panel method building.

For the frame assembly 34 used in the power storage system 30 of the present embodiment, a support frame 76 having a partially different shape from the frame assembly 34 of the first embodiment is used.
In the support frame 76 of the present embodiment, a protrusion 78 having a substantially triangular cross section that protrudes toward the upright portion 28A is formed on a part of the side surface 76B, and the tip of the protrusion 78 is pressed against the side surface of the upright portion 28A. . The side of the side surface 76B is separated from the side surface of the upright portion 28A so that the tip of the bolt 40 does not contact the side surface of the upright portion 74A of the base body 74.

  In the present embodiment, the floor beam 80 is mounted on the spacer 82 disposed on the upper part 28A, and the support frame is provided in the ventilation gap between the floor beam 80 and the upper part 28A. Since the mounting surface 76A of 76 is disposed, the suspension bolt 52 is attached when the power storage system 30 is transferred, and after the power storage system 30 is disposed on the foundation main body 74, the floor beam disposed on the foundation main body 74. Remove so as not to interfere with 80.

  In the present embodiment, a clearance hole 84 is provided on the upper surface of the upright portion 74A of the foundation main body 74 so that the tip of the screw portion of the suspension bolt 52 attached when the power storage system 30 is suspended and the nut 48 do not hit. Is formed.

  Similarly to the first embodiment, the power storage system 30 of the present embodiment is supported by the sturdy main body 74, and the weight of the storage battery 32 does not act on the building body, and the building is affected. It never reaches.

  In the power storage system 30 of the present embodiment, since the projections 78 of the frame assembly 34 are in pressure contact with both side surfaces of the upright portion 28A, it is possible to prevent the frame assembly 34 from being displaced due to replacement work of the storage battery 32 or the like.

[Third Embodiment]
Hereinafter, a third embodiment of the power storage system according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted.
As shown in FIG. 8, the frame assembly 34 used in the power storage system 30 of the present embodiment uses a support frame 86 that is partially different in shape from the frame assembly 34 of the first embodiment. .

  In the support frame 86 of this embodiment, the mounting surface 86A and the support surface 86B are formed in a flat plate shape, and a lower flange portion 86C is formed at the end of the support surface 86B. In addition, a pair of angles 88 are joined to the lower surface of the support frame 86 by welding or the like in order to contact the side surface of the raised portion 28A of the inner base body 28 and prevent displacement.

  Note that a pair of upper frame attachment surfaces 86D whose upper ends are coupled by a coupling surface 86F are joined to the mounting surface 86A by welding or the like.

  Similarly to the first embodiment, the power storage system 30 of the present embodiment is supported by the sturdy inner base body 28 with the weight of the storage battery 32, so the weight of the storage battery 32 does not act on the building body of the unit building 12 at all. The unit building 12 is not affected.

As described above, the power storage system according to the embodiment of the present invention has been described. However, the present invention is not limited to the above, and can be variously modified and implemented without departing from the gist of the present invention. Of course.
In the above embodiment, for example, the frame assembly 34 is formed so as to straddle the upright portion 28A, the support surfaces 36C are provided on both sides of the upright portion 28A, and the storage battery 32 is disposed on both sides of the upright portion 28A. The support surface 36C may be provided only on one side of the frame assembly 34. In this case, it goes without saying that the suspension bolt 52 is provided at a balanced position when the power storage system 30 is lifted.

12 unit building (building)
24 Floor girder (beam)
28 Inside foundation body (foundation)
28A Upright part 30 Power storage system 32 Storage battery 36 Support frame 36A Mounting surface 36C Support surface (support part)
36E Upper frame mounting surface 38 Upper frame 40 Bolt (connecting member)
42 Nut (connection member)
54 terminals 56 terminals 58 Connection cable 60 Electrical cable for in-home entry 62 Waterproof connector 74 Base body (basic)
74A Upright part 76 Support frame 76A Mounting surface (mounting part)
78 Projection 80 Floor beam 86 Support frame 86B Support surface (support part)

Claims (8)

  A power storage system that includes a support frame that is mounted on an upright portion of a foundation of a building and provided with a support portion that supports a storage battery on the outer side in the width direction of the upright portion.   2. The power storage system according to claim 1, wherein the support frame is formed so that a central portion is convex upward so as to straddle the upright portion, and the support portions are provided on both sides of the convex portion. The power storage system according to claim 2 , further comprising an upper frame that holds an upper part of the storage battery, wherein the storage battery is installed between the upper frame and the support frame. A side wall extending upward is formed at the center of the support frame,
The power storage system according to claim 3, wherein the upper frame is detachably connected to the side wall by a connecting member.   The power storage system according to claim 3 or 4, wherein the support frame and the upper frame are disposed below a lower surface level of the floor beam.   The electrical storage system of any one of Claims 1-5 in which the waterproof connector is used for the connector of the electric cable connected to the terminal of the said storage battery.   The plurality of the storage batteries are connected in series, and one end of an electric cable for in-home drawing is connected to each of the start terminal and the termination terminal of the storage battery in series connection. The power storage system according to item 1. The power storage system according to any one of claims 1 to 7, wherein a protrusion that presses against a side surface of the upright portion is formed on the support frame.

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