JP6977905B1 - Storage battery system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved storage battery system having a structure in which a battery module is housed in a battery case. A storage battery system 1 includes a lower case 10 and battery modules B1 and B2 housed in the lower case 10. The lower case 10 has a bottom plate 13 on which the battery modules B1 and B2 are placed, side surfaces S1 and S2, and a fixing component 71 fixed to the bottom plate 13. The battery modules B1 and B2 include a fixing part 81 fixed to the side surface S3 and fitted with the fixing part 71, and a fixing part 82 fixed to the side surface S4 and screwed to the bottom plate 13. As a result, it is not necessary to screw the fixing parts 71 and 81, so that it is not necessary to secure a work space between the side surfaces S1 and S3. On the other hand, a work space for inserting an electric tool or the like is secured between the side surfaces S2 and S4. [Selection diagram] FIG. 9

Description

The present invention relates to a storage battery system, and more particularly to a storage battery system having a structure in which a battery module is housed in a battery case.

As shown in Patent Documents 1 and 2, the storage battery system has a configuration in which various modules such as a battery module and a control box are housed in a battery case. Since the battery module is relatively heavy, it needs to be firmly fixed to the battery case. In order to firmly fix the battery module to the battery case, it is necessary to fix the battery module to the battery case at a plurality of places.

Japanese Unexamined Patent Publication No. 2013-105723 Japanese Unexamined Patent Publication No. 2015-225703

However, in order to fix the battery module to the battery case at a plurality of places, a plurality of work spaces for inserting electric tools and the like are required in the battery case, and there is a problem that the battery case becomes large. Such a problem becomes a particular problem when the housing of the battery case is a tubular body having an integral structure, because the housing cannot be disassembled.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an improved storage battery system having a structure in which a battery module is housed in a battery case.

The storage battery system according to the present invention is a storage battery system including a battery case and a battery module housed in the battery case, and the battery case is perpendicular to the bottom plate on which the battery module is placed and the bottom plate. Having first and second sides parallel to each other and a first fixing component fixed to the bottom plate, the battery module has a third side facing the first side of the battery case and a first side of the battery case. A fourth side surface facing the second side surface, a second fixing part fixed to the third side surface and fitted with the first fixing part, and a second fixed part fixed to the fourth side surface and screwed to the bottom plate. It includes 3 fixing parts, and is characterized in that the distance between the second side surface and the fourth side surface is wider than the distance between the first side surface and the third side surface.

According to the present invention, since it is not necessary to screw the first fixing part and the second fixing part, a work space for inserting a power tool or the like is provided between the first side surface and the third side surface. There is no need to secure it. On the other hand, since a work space for inserting a power tool or the like is secured between the second side surface and the fourth side surface, it is possible to easily screw the third fixing part to the bottom plate. Become.

In the present invention, the battery case has a housing including the first and second side surfaces, and the housing has a structure in which two parallel sides of one rectangular plate-shaped member are attached to each other and fixed. It doesn't matter. A housing having such a structure cannot be disassembled, and it is necessary to work from the upper opening. However, since a work space between the first side surface and the third side surface is not required, the housing has a housing. Can be miniaturized.

In the present invention, the first fixing component extends parallel to the first side surface, one end of which is fixed to the bottom plate, and the other end of the vertical portion projecting toward the battery module. It has an L-shaped structure having a horizontal portion to be formed, and the second fixing component has a vertical portion fixed to a third side surface and a horizontal portion protruding from an end portion of the vertical portion toward the first side surface. The first fixing part and the second fixing part have an L-shaped structure having and, so that the horizontal part of the second fixing part is inserted between the bottom plate and the horizontal part of the first fixing part. It may be fitted. According to this, the battery module can be easily fitted by sliding it horizontally.

As described above, according to the present invention, it is possible to securely fix the battery module only by securing one work space.

FIG. 1 is a schematic perspective view showing the appearance of the storage battery system 1 according to the embodiment of the present invention. FIG. 2 is a schematic perspective view showing the appearance of the storage battery system 1. FIG. 3 is a schematic perspective perspective view of the storage battery system 1. FIG. 4 is a schematic perspective perspective view of the storage battery system 1. FIG. 5 is a schematic perspective side view showing a state in which the conduit cover 50 is attached to the storage battery system 1. FIG. 6 is a schematic perspective view showing a state before the upper case 20 is laminated on the lower case 10. FIG. 7 is a schematic perspective view for explaining a method of connecting the lower case 10 and the upper case 20 by the connecting member 60. FIG. 8 is a schematic cross-sectional view for explaining a method of connecting the lower case 10 and the upper case 20 by the connecting member 60. FIG. 9 is a schematic perspective front view seen from the Y direction for explaining a method of fixing the battery modules B1 and B2 to the lower case 10. FIG. 10 is a schematic perspective side view seen from the X direction for explaining a method of fixing the battery modules B1 and B2 to the lower case 10.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are schematic perspective views showing the appearance of the storage battery system 1 according to the embodiment of the present invention. 3 and 4 are a schematic perspective perspective view of the storage battery system 1, and FIG. 5 is a schematic perspective side view showing a state in which the conduit cover 50 is attached to the storage battery system 1.

As shown in FIGS. 1 to 5, the storage battery system 1 according to the first embodiment of the present invention includes a battery case including a lower case 10 and an upper case 20, and battery modules B1 and B2 housed in the lower case 10. , A battery module B3 housed in an upper case 20, a control box H, and a converter circuit D. The reason why the two battery modules B1 and B2 are housed in the lower case 10 is that the weight of the battery modules B1 and B2 is large, and the reason why the control box H and the converter circuit D are housed in the upper case 20 is. This is because the heat generated by the control box H and the converter circuit D is large. The lower case 10 has a fixing bracket 14 for fixing to the base. The upper case 20 is stacked on the lower case 10 and fixed to the lower case 10 by using two connecting members 60. As shown in FIG. 3, the battery modules B1 to B3 are housed offset in the X direction, whereby a space S is formed inside the lower case 10 and the upper case 20. The space S is used not only as a work space to be described later, but also as a storage space for passing cables such as power lines and signal lines.

The lower case 10 has a square columnar first housing 11 having openings in the vertical direction (Z direction), a first top plate 12 that closes the upper opening of the first housing 11, and a first housing. Includes a first bottom plate 13 that closes the lower opening of 11. Similarly, the upper case 20 has a square columnar second housing 21 having openings in the vertical direction (Z direction), a second top plate 22 for closing the upper opening of the second housing 21, and a second top plate 22. 2 Includes a second bottom plate 23 that closes the lower opening of the housing 21. Both the first housing 11 and the second housing 21 are members obtained by bending a single rectangular plate-shaped member, for example, a pre-coated material called a color steel plate, and the two sides of the rectangular plate-shaped member parallel to each other. It has a structure that is fixed by matching with each other, and by being wound by the winding parts 11a and 21a extending in the Z direction, it has openings at the top and bottom as a whole and a square pillar cylinder with four sides in the internal cavity. It has a shape.

As described above, since the battery case according to the present embodiment uses the first housing 11 and the second housing 21 in which one metal plate is bent into a cylindrical shape, the winding portions 11a and 21a are used. There are no joints other than that, and it is possible to obtain high waterproofness. Moreover, since one metal plate is processed into a cylindrical shape, it is possible to obtain sufficient mechanical strength in the Z direction even when a relatively thin metal plate is used. Here, the four surfaces of the first housing 11 and the second housing 21 are composed of front and back surfaces constituting the XZ surface and both side surfaces constituting the YZ surface. The front and back surfaces constituting the XZ surface have a larger area than both side surfaces constituting the YZ surface. That is, the X direction is the long side and the Y direction is the short side.

The three battery modules B1 to B3 are connected to the converter circuit D via the control box H. The converter circuit D is a DCDC converter for keeping the DC voltage constant, and generates a large amount of heat by operation. The heat generated by the converter circuit D is dissipated by the heat sink 41 provided on the back surface of the upper case 20. Further, inside the upper case 20, heat conduction to the battery module B3 and the control box H is suppressed by covering the converter circuit D with the heat separation wall 42.

As shown in FIG. 5, a grommet 31 for passing the electric wire tube 51 is provided on the back surface of the first housing 11 constituting the lower case 10. Further, on the back surface of the second housing 21 constituting the upper case 20, grommets 32 to 34 for passing the conduits 51 to 53 are provided. Inside the conduit 51, a power line and a signal line connecting the battery modules B1 and B2 and the control box H are housed. Further, inside the conduits 52 and 53, a power line and a signal line connecting the converter circuit D and the external power conditioner are accommodated, respectively. The grommets 31 to 34 and the conduits 51 to 53 are covered with the conduit covers 50 provided on the back surfaces of the first and second housings 11 and 21. As a result, after the lower case 10 and the upper case 20 are stacked, both can be connected by wiring, and the workability is improved. Further, since the conduit cover 50 is easily waterproofed, not only the reliability and durability are improved, but also the design is improved.

FIG. 6 is a schematic perspective view showing a state before the upper case 20 is laminated on the lower case 10.

As shown in FIG. 6, the connecting member 60 is fixed to both short sides extending in the Y direction on the first top plate 12 constituting the lower case 10. The connecting member 60 is a metal part having an L-shaped cross section in XZ, and has a horizontal portion 61 having an XY plane and a vertical portion 62 having a YZ plane, as shown in FIGS. 7 and 8. .. Here, the second bottom plate 23 has a protruding portion 23a protruding in the Z direction from the short side extending in the Y direction toward the first top plate 12, and a folded portion in which the tip of the protruding portion 23a is folded inward in the X direction. The upper case 20 is positioned by having the portion 23b and fitting the protruding portion 23a and the folded portion 23b inside the pair of connecting members 60. As a result, the horizontal portion 61 of the connecting member 60 is located between the first top plate 12 and the folded portion 23b, and the vertical portion 62 of the connecting member 60 overlaps the protruding portion 23a in the X direction. The first top plate 12 and the connecting member 60 are fixed to each other by connecting the first top plate 12 and the horizontal portion 61 with screws 64, and the second bottom plate 23 and the connecting member 60 are perpendicular to the protruding portion 23a. 62 are fixed to each other by connecting them with screws 63. Further, the first top plate 12 and the horizontal portion 61 may be fixed by the waterproof double-sided tape 65 instead of the screw 64 or in addition to the screw 64.

With this configuration, the lower case 10 and the upper case 20 can be easily fixed, so that the lower case 10 in which the battery modules B1 and B2 are housed, the battery module B3, the control box H, and the converter circuit D are housed. By preparing the upper case 20 and stacking both of them, the storage battery system 1 can be installed. Moreover, when the lower case 10 and the upper case 20 are connected by using the connecting member 60, a space corresponding to the height of the vertical portion 62 is formed between the first top plate 12 and the second bottom plate 23. Therefore, it becomes difficult to transfer the heat mainly generated from the converter circuit D to the lower case 10, and the air flows from the long side extending in the X direction, so that the heat dissipation effect is enhanced.

9 and 10 are views for explaining a method of fixing the battery modules B1 and B2 to the lower case 10, FIG. 9 is a schematic perspective front view seen from the Y direction, and FIG. 10 is a view seen from the X direction. It is a schematic perspective side view.

As shown in FIG. 9, fixing parts 71 and 72 made of metal or the like are fixed to the first bottom surface 13 constituting the lower case 10. The fixed part 71 has an L-shaped cross section in XZ and extends in the Y direction. In the fixing component 71, one end (lower end) of the vertical portion extending in the Z direction when viewed from the Y direction is fixed to the first bottom surface 13, and the fixed component 71 extends in the X direction from the other end (upper end) of the vertical portion. The existing horizontal portion projects toward the battery modules B1 and B2. The fixing component 72 is a plate-shaped body extending in the Y direction, and is arranged in the space S. The XY surface of the fixing component 72 is fixed to the first bottom surface 13.

On the other hand, fixing parts 81 and 82 made of metal or the like are fixed to the lower part of the YZ side surface S3 of one of the battery modules B1 and B2. The fixing component 81 is fixed to the lower part of the YZ side surface S3, has an L-shaped cross section in XZ, and extends in the Y direction. In the fixing component 81, the YZ surface of the vertical portion extending in the Z direction is fixed to the YZ side surface S3 of the battery modules B1 and B2, and the X is X from the end portion of the vertical portion toward one side surface S1 of the first housing 11. The horizontal portion protruding in the direction fits with the fixing component 71. The fixing component 82 is fixed to the lower part of the other YZ side surface S4 of the battery modules B1 and B2, has an L-shaped XZ cross section, and extends in the Y direction. The YZ surface of the fixing component 82 is fixed to the YZ side surface S4 of the battery modules B1 and B2, and the portion protruding in the X direction is screwed to the fixing component 72, whereby the fixing component 82 is fixed to the first bottom surface 13. The fixing component 82 may be screwed to both the fixing component 72 and the first bottom surface 13 to directly fix the fixing component 82 and the first bottom surface 13, or to the fixing component 72. By doing so, the fixing component 82 and the first bottom surface 13 may be indirectly fixed.

When the battery modules B1 and B2 are housed inside the lower case 10, one YZ side surface S3 of the battery modules B1 and B2 faces the one YZ side surface S1 of the first housing 11, and the battery modules B1 and B1 After accommodating the other YZ side surface S4 of B2 so as to face the other YZ side surface S2 of the first housing 11, the battery modules B1 and B2 are slid in the X direction. As a result, the horizontal portion of the fixed component 81 is inserted between the first bottom surface 13 and the horizontal portion of the fixed component 71, and the L-shaped fixed component 81 fits into the L-shaped fixed component 71. After that, the power tool 90 is put in the space S and the fixing parts 72 and 82 are screwed. As a result, the battery modules B1 and B2 are securely fixed to the inside of the lower case 10. In this way, one YZ side surface of the battery modules B1 and B2 is positioned by fitting the fixing parts 71 and 81 without screwing, and the other YZ side surface of the battery modules B1 and B2 is screwed. Since the fixing is performed by the above, the fixing of the battery modules B1 and B2 is completed by the work from one side using the power tool 90. Therefore, the distance W1 between the YZ side surface S1 of the first housing 11 and the side surfaces S3 of the battery modules B1 and B2 in the X direction is set to the X direction of the YZ side surface S2 of the first housing 11 and the side surfaces S4 of the battery modules B1 and B2. It can be made sufficiently narrower than the distance W2 in the above, and the size can be reduced. The fixing of the battery module B3 in the upper case 20 can be performed in the same manner.

As described above, in the present embodiment, it is possible to perform the fixing work of the battery modules B1 to B3 by utilizing the space S formed by offsetting the accommodation positions of the battery modules B1 to B3. Further, the battery modules B1 to B3 can be easily removed by removing the screws of the fixing parts 72 and 82 even at the time of maintenance or replacement.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention, and these are also the present invention. Needless to say, it is included in the range.

For example, in the above embodiment, the lower case 10 accommodates two battery modules B1 and B2, and the upper case 20 accommodates the battery module B3, the control box H, and the converter circuit D, but the lower case 10 and the upper case. The number and types of modules accommodated in 20 are not particularly limited. Further, in the above embodiment, two cases 10 and 20 are stacked, but a storage battery system may be configured by stacking three or more cases.

1 Storage battery system 10 Lower case 11 1st housing 11a Winding part 12 1st top plate 12a Opening 13 1st bottom surface 14 Fixing bracket 20 Upper case 21 2nd housing 21a Winding part 22 2nd top plate 23 2nd Bottom surface 23a Protruding part 23b Folded part 23c Opening part 23d Protruding part 31-34 Gromet 41 Heat sink 42 Thermal separation wall 50 Conduit pipe cover 51-53 Conduit pipe 60 Connecting member 61 Horizontal part 62 Vertical part 63, 64 Screw 65 Waterproof double-sided tape 71 , 72, 71, 81 Fixed parts 90 Electric tools B1 to B3 Battery module D Converter circuit H Control box S Space

Claims (3)

With a battery case,
A storage battery system comprising a battery module housed in the battery case.
The battery case has a bottom plate on which the battery module is placed, first and second side surfaces perpendicular to the bottom plate and parallel to each other, and a first fixing component fixed to the bottom plate. Have and
The battery module is fixed to the third side surface facing the first side surface of the battery case, the fourth side surface facing the second side surface of the battery case, and the third side surface. It includes a second fixing part that fits with the fixing part of 1 without screwing, and a third fixing part that is fixed to the fourth side surface and screwed to the bottom plate.
Wherein the first side face than the length of the third aspect, the second side and rather is wide towards length of the fourth aspect, the space between the fourth side and the second side Is a storage battery system characterized in that it constitutes a work space into which a power tool for screwing can be inserted. The battery case has a housing including the first and second sides.
The storage battery system according to claim 1, wherein the housing has a structure in which two sides of a rectangular plate-shaped member parallel to each other are attached to each other and fixed. The first fixing component extends parallel to the first side surface and has a vertical portion whose one end is fixed to the bottom plate and the other end of the vertical portion toward the battery module. It has an L-shaped structure with a protruding horizontal portion and
The second fixing component has an L-shaped structure having a vertical portion fixed to the third side surface and a horizontal portion protruding from the end portion of the vertical portion toward the first side surface. ,
The first fixing component and the second fixing component shall be fitted so that the horizontal portion of the second fixing component is inserted between the bottom plate and the horizontal portion of the first fixing component. The storage battery system according to claim 1 or 2.

Images