JP2021190378A - Battery case - Google Patents

Abstract

To provide a battery case which achieves excellent waterproofness, is lighter, and achieves reduction of manufacturing costs.SOLUTION: A battery case includes: a housing which has a box shape having a hollow interior and includes openings at its upper and lower sides; a top plate which closes the upper opening of the housing; and a bottom plate which closes the lower opening of the housing. The housing is formed by butting one side and the other side, which are parallel to each other, of one rectangular plate member to each other and fixing these sides, has the openings at the upper and lower sides, and has a quadrangular prism shape in which an angle formed by adjacent surfaces is an approximately right angle.SELECTED DRAWING: Figure 3

Description

The present invention relates to a battery case, which is excellent in waterproofness, is lighter, and has a reduced manufacturing cost.

Since the battery case for storing the battery module and the like is installed outdoors for a long period of 10 years or more, high-performance waterproof and dustproof properties and durability against rust and the like are required. Further, each battery module weighs 20 to 30 kg, and when a plurality of battery modules are stored, the battery case itself becomes large and heavy.

International Publication WO2018 / 079019 Gazette

For this reason, it becomes difficult to transport the battery case to the installation location, and there is also a demand for on-site construction in which the battery module is housed in the battery case. However, it is difficult to secure waterproof guarantee, assembly guarantee, etc. when constructing on site. Therefore, there is a need for a battery case that is excellent in waterproofness, is lighter, and has a reduced manufacturing cost.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a battery case which is excellent in waterproofness, is lighter in weight, and has a reduced manufacturing cost.

The battery case according to the present invention has a box-shaped internal cavity, and has a housing having openings at the top and bottom, a top plate that closes the upper opening of the housing, and a bottom plate that closes the lower opening of the housing. , Equipped with. The housing is a rectangular plate-shaped member in which one parallel side and the other side are attached and fixed, and has openings at the top and bottom, and the angles formed by the adjacent surfaces are approximately right angles. It is a square pillar tube type.

According to this configuration, waterproofness is ensured because the parts other than the butt portion of the housing are connected by a surface. Therefore, it is sufficient to provide a waterproof structure only in the butt portion. Further, since the housing can be created by bending a single metal plate, the number of parts can be reduced. Further, since each corner of the rectangular cylinder has a surface shape bent at a right angle, the mechanical strength can be improved even with a thin material, and the strength can be increased without using a frame or the like. From the above, it is possible to provide a battery case which is excellent in waterproofness and mechanical strength, is lightweight, and has a reduced manufacturing cost.

The battery case according to the present invention is provided so that each of the upper end portions of the four surfaces constituting the housing is bent inward of the upper opening so that each of them forms a right angle to the four surfaces constituting the housing. Each of the upper flat surface portion and the lower end portions of the four surfaces constituting the housing are bent inward of the lower opening so as to form a right angle to the four surfaces constituting the square pillar cylinder shape of the housing. It is possible to adopt a configuration in which a flat bottom surface portion is provided. Further, a packing or an adhesive tape is provided on the upper flat surface portion and the bottom flat surface portion, and the upper flat surface portion and the bottom flat surface portion and the top plate and the bottom plate are connected and fixed by connecting means such as screws and conductive rivets. Can be adopted. Further, the top plate has a rectangular box shape without a lid, and the side surface portion of the top plate is arranged so as to overlap a part of the side surface portion of the housing.

According to this configuration, a waterproof structure can be easily formed by fixing the top plate and the bottom plate to the flat surface portion formed at the upper and lower ends of the square pillar-shaped housing by using packing or adhesive tape. .. Further, the top plate portion has a lid shape having a rectangular frame shape and is covered so as to cover the upper part of the housing, whereby a waterproof structure can be realized and rainwater or the like can be prevented. Therefore, it is not necessary to provide a hole or the like on the side surface of the housing, and it is possible to provide a battery case having excellent waterproofness, light weight, and reduced manufacturing cost.

The housing included in the battery case according to the present invention is made of a pre-painted material. The battery module housed inside the housing adopts a configuration in which the fixing tool bent into an L shape and the housing side mounting tool fixed to the inner surface of the housing with permanent adhesive tape are fixed. be able to. Further, it is possible to adopt a configuration in which the housing, the top plate and the bottom plate are connected and fixed by connecting means such as screws and conductive rivets, and the holes for fixing the connecting means are burring.

According to this configuration, it is possible to significantly reduce the cost by using the pre-painted material for the housing. Further, if a screw hole is made in the pre-painted material or welding is performed, welding, painting, waterproofing, etc. are required again at that part, which greatly increases the cost, but in the embodiment, it is permanently adhered to the inner surface of the housing. Since the housing-side mounting tool fixed by the tape and the fixing tool bent into an L shape are connected, it is possible to avoid an increase in cost. Further, since the hole portion is burring processed, it is possible to enable electrical connection even if the pre-painted material is used.

In the battery case according to the present invention, a conduit cover for covering the conduit and the like is arranged adjacent to the housing, and the top plate can be configured to cover the upper portion of the housing and the conduit cover. ..
According to this configuration, even if a hole is made in the side surface of the square pillar tube type, a waterproof structure can be easily formed by the conduit cover that is put on the hole, so that the waterproof structure is excellent and the manufacturing cost is reduced. It will be possible to provide a new battery case.

The battery case according to the present invention can adopt a configuration in which an opening into which a battery module can be inserted and removed is provided on the side surface of the housing. Further, the housing is fixed so that one parallel side and the other side of one rectangular plate-shaped member are aligned and have an opening in the left-right direction, and the angles formed by the adjacent surfaces are substantially right angles. It is a horizontally placed square pillar cylinder type housing, and the opening can adopt a configuration in which the battery module can be inserted and removed.

According to this configuration, when a request for replacement of the battery module occurs later due to a failure or the like, the battery module can be easily inserted and removed without removing the top plate or the like, so that complicated work can be avoided.

As described above, according to the present invention, it is possible to provide a battery case which is excellent in waterproofness, is lighter, and has a reduced manufacturing cost.

FIG. 1 is a schematic perspective view showing the appearance of the battery case 1A according to the embodiment of the present invention. FIG. 1b is a schematic perspective view showing the appearance of another battery case 1Ab according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing the appearance of the battery case 1Aa with the top plate 4 removed from different angles. FIG. 3 is an enlarged schematic perspective view of the upper part of the battery case 1Aa, showing a state in which the top plate 4 and the packing 20 are removed. FIG. 4 is an enlarged schematic perspective view of the upper appearance of the battery case 1A, and is a diagram showing a state in which the top plate 4 is removed. FIG. 5a is a schematic perspective view showing the appearance of the battery module 14. FIG. 5b is a schematic perspective view showing the appearance of the battery module 14 according to another aspect. FIG. 6 is a schematic perspective view showing the appearance of the battery case 1B according to the embodiment of the present invention. FIG. 7 is a schematic perspective view showing the appearance of the battery case 1B according to the embodiment of the present invention from different angles. FIG. 8 is a schematic perspective view showing the appearance of the battery case 1B, and is a view showing a state in which the side panel 34 is removed. FIG. 9 is a transparent perspective view of the appearance of the battery case 1Ab, and is a diagram for showing a waterproof structure of each part. FIG. 10 is a schematic perspective view showing an enlarged area B of FIG. 9, and is a diagram showing the appearance of a part of the top plate 4. FIG. 11 is a schematic plan view showing the configuration of the region B of FIG. 9 in an enlarged manner. FIG. 12 is a schematic plan view showing the configuration of the region B of FIG. 9 in an enlarged manner. FIG. 12A is a plan view showing a schematic configuration of the protrusion 30. FIG. 12B is a front view showing a schematic configuration of the protrusion 30. FIG. 13A is a schematic perspective view showing the appearance of the region C in FIG. 9 in an enlarged manner with a partial perspective. FIG. 13B is a schematic perspective view showing an enlarged view of the appearance of the region D in FIG. 9 by partially seeing through. 13C is a schematic perspective view showing the appearance of the region E of FIG. 9 in an enlarged manner. FIG. 14 is a schematic exploded perspective view showing another configuration of region B in FIG. 9 in an enlarged manner. FIG. 15 is a schematic perspective view showing the appearance of the battery case 1C according to the embodiment of the present invention. FIG. 16 is a schematic perspective view showing the appearance of the battery case 1C with the side panel 44 removed from different angles.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the Z direction may be referred to as a vertical direction, the X direction may be referred to as a left-right direction, and the Y direction may be referred to as a front-back direction. Further, the same elements are given the same reference numerals or names, and duplicate explanations are omitted.

Hereinafter, embodiments exemplified by the battery cases 1Aa, 1Ab, 1B, and 1C will be described.
1 and 2 to 5b are diagrams showing the configuration of the battery case 1Aa according to the embodiment. As shown in FIGS. 1 to 4, the battery case 1Aa according to the present embodiment includes a housing 2, a conduit cover 6 arranged adjacent to the housing 2, and the housing 2 and the conduit cover 6. It is provided with a top plate 4 that covers both of them. A connection portion 10 for installing the battery case 1Aa is provided below the housing 2. Further below the connection portion 10, a grounding portion 8 that can be used as a simple base for grounding is provided. A battery module (not shown) is stored inside the housing 2, and a synthetic resin flexible conduit 7 (hereinafter referred to as a conduit 7) connected to the battery module is connected to the battery module. The conduit cover 6 covers the conduit 7 in order to protect it from rainwater, dust, and the like.

For example, the housing 2 is vertically fixed by abutting one side and the other side of one rectangular plate-shaped member parallel to each other at the abutting portion 2a to provide a crease 2c in the vertical direction. It is a square pillar cylinder type with an opening in the inside and four sides with an internal cavity. In this square pillar-shaped housing 2, the angles formed by the adjacent surfaces are substantially right angles. In the battery case 1A, the housing 2 is made of a pre-painted material. The housing 2 has an opening in which the internal space is opened vertically, and the top plate 4 and the bottom plate are installed so as to close the opening. As will be described later, the opening of the housing 2 is provided with a waterproof structure by a top plate 4 and a bottom plate, thereby protecting the battery module 14 stored inside the housing 2 from rainwater, dust, and the like. There is. The bottom plate will be described by way of exemplifying the battery case 1Ab as described later.

Each of the four sides of the upper end of the square pillar cylinder that constitutes the housing 2 is bent inward toward the upper opening so that each of the four sides is at right angles to the four sides that make up the housing 2. A flat surface portion 22a is provided. The conduit cover 6 has a box shape having openings at the top and bottom and having four sides with an internal cavity. As shown in FIGS. 3 and 4, the conduit cover 6 also has a flat surface portion 22b at the upper end portion, similarly to the housing 2.

The top plate 4 has a rectangular box shape with no lid and bottom. As shown in FIGS. 1 and 4, the housing 2 and the top plate 4 are brought into contact with the upper flat surface portion 22a via the packing 20, and are connected and fixed by connecting means such as screws or conductive rivets. Instead of the packing 20, an adhesive tape having a waterproof function may be used. The conduit cover 6 is loaded on the upper part of the flat surface portion 22b. The conduit cover 6 and the flat surface portion 22b may be fixed with the double-sided waterproof tape 24.

The top plate 4 is installed so as to cover the upper portion of the housing 2 and the conduit cover 6 including the housing 2. When the top plate 4 is installed, the side surface portion 4b of the top plate 4 covers the upper portion and the side surface portion 2b of the housing 2, and the upper portion and the side surface portion of the conduit cover 6, so that a part of these side surfaces overlap each other. Is located in.

As shown in FIGS. 3 to 5, the battery module 14 housed inside the housing 2 is provided with a fixture 18 bent into an L shape at the upper end. A housing-side attachment 16 fixed with a permanent adhesive tape or the like is provided on the inner surface of the housing 2. The fixture 18 includes a flat surface portion 18a configured to be in contact with the upper surface 16a of the housing-side mounting tool 16. The battery module 14 is fixed in the housing 2 by fixing the flat surface portion 18a of the fixture 18 and the upper surface 16a of the housing side fixture 16 so as to be in contact with each other. The housing-side mounting tool 16 and the fixing tool 18 are fixed by, for example, adhesive tape. In this case, there is no mounting hole or the like provided on the side surface of the housing 2.

As shown in FIG. 5a, the battery modules 14 are configured in, for example, two upper and lower stacks, and the upper battery module 14 and the lower battery module 14 are connected by a connector 19. Further, as shown in FIG. 5b, the battery module 14 may be configured to be fixed to the housing 2 by the L-shaped metal fitting 15. The battery case 1Ab shown in FIGS. 1b, 9 and the like shows a mode in which the conduit cover 6 is not provided. Other configurations are the same as those of the battery case 1Aa described above.

6 to 14 are views showing the configuration of the battery case 1B according to the embodiment. FIG. 7 shows the appearance from a different angle from that of FIG. As shown in FIGS. 6 to 8, the battery case 1B includes a housing 2, a top plate 4, a conduit 7, a grounding portion 8, and a connecting portion 10. Similar to the battery case 1Aa, the housing 2 has one parallel side and the other side of one rectangular plate-shaped member abutted at the abutting portion 2a to be waterproofed and fixed, and has openings at the top and bottom as a whole. It is a square pillar cylinder type with four sides in the internal cavity. In the battery case 1B, the housing 2 is made of a pre-painted material. The battery case 1B is provided with a side panel 34 on the side surface of the housing 2, and the housing 2 covered with the side panel 34 is provided with an opening 36 through which the battery module 14 can be inserted and removed. A waterproof structure such as a packing 20 is provided between the side panel 34 and the opening 36 along the edge thereof. The side panel 34 and the opening 36 are detachably fixed by, for example, screws or the like. By removing the side panel 34 from the housing 2, the battery module 14 can be inserted and removed from the inside of the housing 2 through the opening 36.

9 to 14 are views for explaining the waterproof structure of the battery case 1Ab. 10 to 12B are views showing a waterproof structure in the region B of FIG. As shown in FIGS. 9 and 10, the top plate 4 includes a ceiling portion 4a and a side surface portion 4b forming a right angle to the ceiling portion 4a, thereby forming a covered and bottomless rectangular box shape. A hole 4c is provided at a corner of the ceiling 4a. A hole 4d is provided near the upper part of the abutting portion 2a of the ceiling portion 4a. As shown in FIG. 11, the plurality of upper plane portions 22a provided at the upper end portion of the housing 2 substantially form one plane. In the corner portion of the housing 2, the double-sided waterproof tape 24 is adhesively arranged so as to cover the connecting portion of the adjacent upper flat portion 22a. Further, the upper flat surface portion 22a is provided with a hole portion 22d for fastening the conduction rivet. Further, on the upper flat surface portion 22a, packings 20 which are continuously arranged along the upper flat surface portion 22a are provided. The packing 20 is sandwiched between the upper flat surface portion 22a and the top plate 4 and adhered to the packing 20 to exhibit waterproofness.

Further, as shown in FIGS. 12, 12A and 12B, a connecting metal fitting 29 having a protrusion 30 is provided at a connecting portion of the upper flat portion 22a. When the top plate 4 is arranged on the housing 2, the protrusion 30 is inserted into the hole 4c of the top plate 4 to fix the top plate 4. The connecting metal fitting 29 is provided with a hole 29a. The connecting metal fitting 29 and the upper flat surface portion 22a are fixed by the conductive rivet 31. The hole 29a of the connecting metal fitting 29 and the hole 22d of the upper flat surface portion 22a are holes into which the conductive rivet 31 is inserted when the connecting metal fitting 29 is fixed by the conductive rivet 31.

FIG. 13A is a diagram showing a waterproof structure in the region C of FIG. 9, that is, the upper end of the abutting portion 2a of the housing 2. At the upper end of the butt portion 2a of the housing 2, the double-sided waterproof tape 24 is adhered so as to straddle the connecting portion of the upper flat portion 22a in the butt portion 2a. An L-shaped connecting metal fitting 38 is arranged so as to abut on the upper portion of the double-sided waterproof tape 24 and the front surface portion of the housing 2. The connecting metal fitting 38 is fixed by the conduction rivet 31 with the double-sided waterproof tape 24 sandwiched between the connecting metal fitting 38 and the upper flat surface portion 22a. The upper flat surface portion 22a and the connecting metal fitting 38 are provided with a hole into which the conduction rivet 31 is inserted. The connecting metal fitting 38 is provided with a protrusion 39. When the top plate 4 is arranged on the housing 2, the protrusion 39 is inserted into the hole 4d of the top plate 4 to fix the top plate 4. When the conductive rivet 31 for waterproofing is struck, the conductive rivet 31 is pulled to expand the diameter of the conductive rivet 31 with respect to the hole provided in the upper flat surface portion 22a and the connecting metal fitting 38. Conduction is realized by having a structure in which the enlarged portion comes into contact with the hole portion. In this way, the conduction rivet 31 imparts electrical conductivity and fixes the member.

FIG. 13B is a diagram showing a waterproof structure in the region D of FIG. 9, that is, the lower part of the housing 2. Each of the lower end portions of the four surfaces constituting the housing 2 is also provided with a bottom flat surface portion 22c so as to be bent inward of the lower opening and at right angles to each of the four surfaces constituting the housing 2. ing. This is the same as the upper flat surface portion 22a provided on the upper portion of the housing 2 described in the battery case 1Aa. In the region D, the bottom plate 5 is in contact with the bottom flat surface portion 22c from the lower side. The bottom flat surface portion 22c and the bottom plate 5 are adhesively fixed by interposing a double-sided waterproof tape 24 between them. The double-sided waterproof tape 24 is continuously and continuously arranged along the corner shape of the bottom plate 5. When striking a conductive rivet for waterproofing (not shown), the conductive rivet is pulled to increase the diameter of the conductive rivet with respect to the bottom flat surface portion 22c and the holes provided in the bottom plate 5. Continuity is realized by having a structure in which the enlarged portion comes into contact with the hole portion (not shown). In this way, the conduction rivet imparts electrical conductivity and fixes the member.

FIG. 13C is a diagram showing a waterproof structure in the region E of FIG. 9, that is, the lower portion of the butt portion 2a of the housing 2. In the butt portion 2a of the housing 2, the bottom flat surface portion 22c and the bottom plate 5 are adhesively fixed with a double-sided waterproof tape 24 interposed therebetween.

FIG. 14 is a diagram showing another example of the waterproof structure in the region B of FIG. As shown in FIG. 14, the double-sided waterproof tape 24 is attached so as to straddle between the adjacent upper flat portions 22a at the connecting portion of the upper flat portions 22a. A connecting metal fitting 28 is provided so as to be overlapped on the double-sided waterproof tape 24. The connecting metal fitting 28 is provided with two notches 28a in the direction of the upper flat surface portion 22a adjacent to both sides. The packing 20 is arranged along the upper flat surface portion 22a. The end portion of the packing 20 is fitted into the notch portion 28a and fixed.

Further, the connecting packing 26 is arranged so as to be overlapped on the connecting metal fitting 28. The connecting packing 26 is provided with a notch 26a like the connecting metal fitting 28. By arranging the packing 20 so as to be fitted into the notch 28a and the notch 26a, the waterproof effect can be improved. The connecting metal fitting 28 includes a protrusion 28b that projects upward. The connecting packing 26 is arranged so as to cover the connecting metal fitting 28. The connecting packing 26 includes a protrusion 28b that projects upward. The top plate 4 is arranged so as to cover it from above. At this time, the protrusion 28b is inserted into the hole 4c provided in the top plate 4, so that the top plate 4 is positioned.

At the butt portion 2a, the upper portion and the lower portion of the butt portion 2a configured as described above, processing such as attaching another connecting sheet metal from the back side or the front surface with double-sided tape, attaching with packing, or filling with caulking can be performed. You will need it. Further, the hole portion 22d and the hole portion 29a are subjected to burring processing.

Next, the configuration of the battery case 1C will be described with reference to FIGS. 15 and 16. The battery case 1C includes a housing 42, a side panel 44, a grounding portion 8, and a connecting portion 10. The housing 42 is configured by aligning and fixing one parallel side and the other side of one rectangular plate-shaped member to form a butt portion 42b at the lower portion thereof, and further subjecting the butt portion 42b to waterproofing. Has been done. The housing 42 is provided with a crease 42a in the lateral direction, and has an opening 50 on the left and right as a whole, and is a horizontally placed square pillar cylinder type having four sides in an internal cavity. The housing 42 is made of a pre-painted material.

At the left and right ends of each of the four sides of the square columnar cylinder that constitutes the housing 42, the ends of the housing 42 are bent inward toward the opening 50, and each of the four sides constituting the housing 42 is bent. A flat surface portion 48 is provided so as to form a right angle. The flat surface portion 48 is provided with a waterproof structure using double-sided waterproof tape, packing, caulking, etc. (not shown here). The housing 42 has an opening 50 in which the internal space is open to the left and right, and the side panel 44 is arranged so as to close the opening 50. The side panel 44 is detachably fixed to the housing 42 by using a connecting means such as a screw. As shown in FIG. 8, by removing the side panel 44 from the housing 42, a battery module (not shown here) can be inserted and removed from the inside of the housing 42 through the opening 50.

As described above, according to the battery cases 1Aa, 1Ab, 1B, and 1C according to the embodiment, the following effects are obtained.

The battery cases 1Aa, 1Ab, and 1B according to the embodiment have a box-shaped internal cavity, and have a housing 2 having openings at the top and bottom, a top plate 4 for closing the upper opening of the housing, and a housing 2. It is provided with a bottom plate 5 for closing the lower opening of the. The housing is a square pillar-cylinder type in which one parallel side and the other side of one rectangular plate-shaped member are abutted and fixed by the abutting portion 2a, and has openings at the top and bottom as a whole.

According to this configuration, it is only necessary to provide a waterproof structure only in the butt portion 2a, and the housing can be created by bending a single metal plate, so that the number of parts can be reduced and a lightweight battery can be used. Cases 1Aa, 1Ab, and 1B can be provided. Further, since the crease 2c having a shape bent at a right angle is formed at each corner of the rectangular cylinder, the mechanical strength can be improved even with a thin material. Further, in the battery case 1C, since the crease 42a is formed in the lateral direction in the same manner, the same effect can be obtained.

The battery case according to the embodiment is provided so that each of the upper and lower end portions of the four surfaces constituting the housing 2 is bent inward of the upper opening so that each of them forms a right angle to the four surfaces constituting the housing 2. The flat surface portions 22a and 22c are provided. Processing such as attaching another connecting sheet metal to the flat surface portions 22a and 22c from the back side or the front surface with double-sided tape, attaching with packing, or filling with caulking is performed. A packing 20 or a double-sided waterproof tape 24 is provided, and the flat surface portions 22a and 22c are connected and fixed to the top plate and the bottom plate by connecting means such as screws and conductive rivets. The side surface portion 4b of the top plate 4 is arranged so as to overlap a part of the side surface portion of the housing 2.

According to this configuration, since the upper and lower end portions of the prismatic cylinder type housing 2 can be bent inward to form substantially continuous flat surface portions 22a and 22c, the packing 20 or double-sided waterproofing can be formed on the flat surface portions 22a and 22c. The tape 24 can be provided. Therefore, the waterproof structure can be easily constructed. Further, the top plate 4 can be formed into a rectangular box-shaped lid with no bottom and can be covered on the upper part of the housing to realize a waterproof structure and prevent rainwater and the like. Therefore, it is not necessary to provide a hole or the like on the side surface of the housing, and it is possible to provide a battery case having excellent waterproofness, light weight, and reduced manufacturing cost.

In the battery cases 1Aa, 1Ab, 1B, and 1C according to the embodiment, the housings 2 and 42 are made of a pre-painted material. The battery module 14 housed inside the housing 2 is fixed by connecting the fixing tool 18 bent into an L shape and the housing side mounting tool 16 fixed to the inner surface of the housing 2 with a permanent adhesive tape. Ru. The housing 2, the top plate 4, and the bottom plate 5 are connected and fixed by a fixing tool 18 and a housing side mounting tool 16 by connecting means such as screws and conductive rivets. The holes 4c and 22d for fixing the connecting means are burred.

According to this configuration, it is possible to significantly reduce the cost by using the pre-painted material. In addition, if screw holes are made in the pre-painted material or welding is performed, welding, painting, waterproofing, etc. will be required again at that part, resulting in a significant cost increase. Since it is fixed to the inner surface of the housing 2, this can be avoided. In addition, the burring process enables electrical connection even with pre-painted materials.

In the battery case 1Aa according to the embodiment, an electric wire tube cover 6 for covering the electric wire tube and the like is arranged adjacent to the housing 2, and the top plate 4 covers the upper part of the housing 2 and the electric wire tube cover 6 including the housing 2. There is. According to this configuration, even if a hole is made in the side surface of the cylinder, a waterproof structure can be formed on the surface of the conduit cover 6 to be placed on the hole, so that the battery case is excellent in waterproofness and the manufacturing cost is reduced. Can be provided.

The battery cases 1B and 1C according to the embodiment are provided with openings 36 and 50 into which the battery module 14 can be inserted on the side surfaces of the housings 2 and 42. According to this configuration, when the battery module 14 is replaced at the time of repair or the like, the battery module 14 can be easily inserted and removed without removing the top plate 4 and the like, so that complicated work can be avoided.

As described above, according to the present invention, it is possible to provide a battery case which is excellent in waterproofness, is lighter, and has a reduced manufacturing cost.

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.

1Aa, 1Ab, 1B, 1C Battery case 2, 42 Housing 2a, 42b Butt part 2b, 4b Side part 2c, 42a Fold 4 Top plate 4a Ceiling part 4c, 4d, 22d, 29a Hole part 5 Bottom plate 6 Conduit cover 7 Conduit 8 Grounding part 10 Connection part 14 Battery module 16 Housing side fixture 18 Fixture 19 Fixture 20 Packing 18a, 22a, 22b, 22c, 48 Flat part 24 Double-sided waterproof tape 26 Connecting packing 26a, 28a Notches 28, 29 , 38 Connecting metal fittings 28b, 30, 39 Protrusions 31 Conductive rivets 32 Intermediate metal fittings 34, 44 Side panels 36, 50 Openings

Claims (10)

A box-shaped housing with internal cavities and openings at the top and bottom,
A top plate that closes the upper opening of the housing and
A bottom plate that closes the lower opening of the housing is provided.
The housing is a square pillar in which one parallel side and the other side of one rectangular plate-shaped member are attached and fixed, have openings at the top and bottom, and the angles formed by the adjacent surfaces are substantially right angles. A tubular battery case. Each of the upper end portions of the four surfaces constituting the housing is bent inward of the upper opening, and the upper flat surface portion provided so as to form a right angle to the four surfaces constituting the housing. ,
Each of the lower end portions of the four surfaces constituting the housing is bent inward of the lower opening, and the bottom flat surface portion provided so as to form a right angle to the four surfaces constituting the housing. The battery case according to claim 1. The top plate has a rectangular box shape with no bottom and is covered.
The housing and the top plate are in contact with the upper flat surface portion via packing or adhesive tape, and are fixed by connecting means.
The housing and the bottom plate are in contact with the bottom flat surface portion via packing or adhesive tape, and are fixed by connecting means.
The battery case according to claim 2, wherein the side surface portion of the top plate is arranged so that a part of the side surface portion of the housing overlaps. The battery case according to any one of claims 1 to 3, wherein the housing is made of a pre-painted material. The battery module stored inside the housing is claimed to be installed by fixing a fixture bent into an L shape and a housing-side fixture fixed to the inner surface of the housing with a permanent adhesive tape. The battery case according to any one of items 1 to 4. The housing and the top plate are fixed by connecting means in the upper flat surface portion, and the hole portion for fixing the connecting means is burring processed.
The battery case according to claim 3, wherein the housing and the bottom plate are fixed by a connecting means in the bottom flat surface portion, and the hole portion for fixing the connecting means is burring processed. The housing and the top plate are fixed by connecting means on the upper flat surface portion.
The housing and the bottom plate are fixed by connecting means on the bottom flat surface portion.
The battery case according to claim 3, wherein at least one of the connecting means is a conduction rivet. One of claims 1 to 7, wherein a conduit cover for covering the conduit and the like is arranged adjacent to the housing, and the top plate covers the upper portion of the housing and the conduit cover including the housing. The battery case described in. The battery case according to any one of claims 1 to 8, wherein an opening into which a battery module can be inserted and removed is provided on a side surface of the housing. The housing is fixed so that one parallel side and the other side of one rectangular plate-shaped member are aligned and have an opening in the left-right direction, and the angle formed by the adjacent surfaces is substantially right-angled. The battery case according to any one of claims 1 to 8, wherein the housing has a rectangular prism shape, and the opening is an opening into which a battery module can be inserted and removed.

Images