WO2019064722A1

WO2019064722A1 - Power supply device

Info

Publication number: WO2019064722A1
Application number: PCT/JP2018/022544
Authority: WO
Inventors: 米田　晴彦; 中野　雅也; 真己拝野; 岸田　裕司; 隆志松元; 慶一伊藤
Original assignee: 三洋電機株式会社; 本田技研工業株式会社
Priority date: 2017-09-29
Filing date: 2018-06-13
Publication date: 2019-04-04
Also published as: JPWO2019064722A1; JP7173977B2

Abstract

[Problem] To improve the strength and the rigidity of a power supply device. [Solution] A power supply device 100 comprises: bands 51 that have an L-shaped horizontal cross section, each band covering one of four sides connected to corresponding vertices of a top surface 41 and a bottom surface 42 of a battery assembly 40; and a storage case 10 that stores the battery assembly 40 with the four sides covered with the bands 51, and at least one surface of which is opened. Each band 51 includes a first surface 52a and a second surface 52b adjacent to each other to cover the sides of the battery assembly 40. The first surface 52a includes a first bent surface 52c that is formed by bending the end of the first surface 52a along a first bending line 52d and covers a part of a bottom surface 42 of the battery assembly 40, and the second surface 52b includes a second bent surface 52e that is formed by bending the end of the second surface 52b along a second bending line 52f and covers a part of the bottom surface 42 of the battery assembly 40 so that the second bent surface 52e overlaps the first bent surface 52c. The periphery of the first bending line 52d and the second bending line 52f is cut out along the boundary between the first surface 52a and the second surface 52b.

Description

Power supply

The present invention relates to a power supply device.

A power supply apparatus having a large number of secondary battery cells can connect the secondary battery cells in series to increase the output voltage. For example, a power supply for driving an assist bicycle, an electric cart, a hybrid car, an electric car, etc. It is used for applications that are charged and discharged with a large current.

Such a power supply device is required to have sufficient strength because it is exposed to shock and vibration. For example, it is conceivable to reinforce the corners using a metal frame.

However, since stress is likely to be concentrated at the corners, it is conceivable that even with metal, the load becomes large and sufficient strength can not be maintained.

JP 2004-236450 A

The present invention has been made in view of the conventional background described above, and one object of the present invention is to provide a power supply device with enhanced strength and rigidity.

Means for Solving the Problems and Effects of the Invention

According to the power supply device of the first aspect of the present invention, the top surface and the bottom surface having a rectangular parallelepiped outer shape including one or more battery cells and separated in parallel with each other, and between the top surface and the bottom surface A battery assembly having side surfaces connecting them, a band portion having an L-shaped horizontal cross section which covers four sides connecting corresponding apexes of the top surface and the bottom surface of the battery assembly; It is a power supply device provided with the storage case which stores the said battery assembly which covered 4 sides by the band part, and which has at least one surface opened, Comprising: Each band part covers the edge of the said battery assembly, It mutually adjoins The first surface includes a first surface and a second surface, and the first surface includes a first curved surface that bends an end thereof with a first bending line to cover a part of the bottom surface of the battery assembly, Two sides fold the end with a second folding line and fold over the first folding line A second bent surface covering a portion of the bottom surface of the battery assembly in a state, and a shape in which the vicinity of the first and second bent curves is cut off at the boundary between the first surface and the second surface It can be done. With the above configuration, it is possible to relieve the stress on the corner where stress is likely to be concentrated, and the band can be protected.

Moreover, according to the power supply apparatus which concerns on a 2nd side surface, in addition to the said structure, the bending side screw hole is opened by the said 1st bending surface, The 2nd bending side is made to the said 2nd bending surface Screw holes are opened, and each band portion can be fixed by screwing through the bent side screw hole and the second bent side screw hole. According to the above configuration, four band portions can be fixed from the bottom of the battery assembly, and the workability is improved.

Furthermore, according to the power supply device according to the third aspect, in addition to any of the above configurations, each band portion has the first bent surface at the end of the first surface and the end of the second surface. The second bent surface is provided on each side, and a part of the bottom surface and the top surface of the battery assembly is covered with the second bent surface in a state of being folded over with the first bent surface and fixed by screwing. can do. With the above configuration, the band portions can be fixed on the top surface and the bottom surface of the battery assembly, which improves the workability.

Furthermore, according to the power supply device of the fourth aspect, in addition to any one of the above-described configurations, each band portion at least partially includes the adjacent pair of sides among the sides adjacent to each other. And a connecting side which connects the side supporting portion at both ends and which covers a part of the side constituting the top surface, and which is integrally formed in each side supporting portion, The first and second surfaces can be formed. According to the above configuration, the band portion can be formed in a U-shape and the battery assembly can be held by being sandwiched between the side supporting portions, so that the assembly workability can be improved and the member for holding one side of the top surface and the side The members holding the side can be integrated to improve mechanical strength and rigidity. In addition, it is also possible to reduce the weight of the band itself by improving mechanical strength and rigidity.

Furthermore, according to the power supply device according to the fifth aspect, in addition to any of the above configurations, the first surface may be formed wider in the width direction intersecting the extension direction than the second surface. it can.

Furthermore, according to the power supply device of the sixth aspect, in addition to any one of the above configurations, the first surfaces are disposed on the first side surface of the side surfaces of the battery assembly, Two sides can be arrange | positioned on the 2nd side adjacent to the said 1st side among the side of the said battery assembly.

Furthermore, according to the power supply device according to the seventh aspect, in addition to any of the above configurations, plate side screw holes are opened on both sides of the plate shape, and the bottom and top surfaces of the power supply The screws formed at the four corners and passing through the bent side screw holes and the second bent side screw holes are passed through the plate side screw holes and passed across and fixed between the separated screws, which are parallel to each other Can be provided with a pair of reinforcing plates arranged in

Furthermore, according to the power supply device according to the eighth aspect, in addition to any of the above configurations, the reinforcing plate can be disposed in parallel with the first side surface.

Furthermore, according to the power supply device according to the ninth aspect, in addition to any one of the above configurations, the battery assembly is formed in a vertically long rectangular shape, and each band portion is formed of the rectangular battery. It can be arranged to cover the long sides of the assembly respectively. According to the above configuration, the long side of the rectangular battery assembly can be reinforced by the band portion to improve the strength of the power supply device.

Furthermore, according to the power supply device according to the tenth aspect, in addition to any of the above configurations, the battery assembly can be formed in a shape in which a part on the short side of the rectangular shape is cut out. . According to the above configuration, the member such as the output terminal can be disposed in the space cut out in the storage case.

Furthermore, according to the power supply device of the eleventh aspect, in addition to any of the above-described configurations, each band portion can be made of metal.

Furthermore, according to the power supply device of the twelfth aspect, there is provided a battery assembly including one or more battery cells and having a box shape having a top surface and a bottom surface, and a top surface and a bottom surface of the battery assembly. A storage case covering at least one surface, which accommodates a band unit having an L-shaped horizontal cross section and covering four sides connecting corresponding apexes, and the battery assembly whose four sides are covered by the band unit. And each band portion includes a first surface and a second surface adjacent to each other covering the sides of the battery assembly, and the first surface has a first bending line at an end thereof. The first curved surface may be bent to cover a part of the bottom surface of the battery assembly, and the second surface may have a shape in which a predetermined area is cut away from the first curved surface. With the above configuration, it is possible to relieve the stress on the corner where stress is likely to be concentrated, and the band can be protected.

It is a perspective view showing a power supply device concerning one embodiment of the present invention. It is the perspective view which looked at the power supply device of FIG. 1 from diagonally downward. It is a disassembled perspective view of the power supply device of FIG. It is the disassembled perspective view which looked at the power supply device of FIG. 3 from diagonally downward. FIG. 5 is a cross-sectional view taken along line VV of the power supply device of FIG. 1; It is the disassembled perspective view which removed the metal plate from the battery assembly of FIG. It is the disassembled perspective view which looked the battery assembly of FIG. 6 from diagonally downward. It is a disassembled perspective view of the battery assembly of FIG. FIG. 9 is a further exploded perspective view of the battery assembly of FIG. 8; It is a disassembled sectional view which shows the state which fastens a battery assembly with a metal plate. It is a perspective view which shows the metal plate of FIG. It is a perspective view which shows the metal plate which concerns on Example 2. FIG. It is a perspective view of the bottom cover part of FIG. It is a perspective view of the canopy part of FIG. FIG. 15A is a cross-sectional view showing a state in which the battery assembly is press-fit into the bottom cover, and FIG. 15B is a cross-sectional view showing a state in which the battery assembly is press-fit into the lead-in rib. It is a disassembled perspective view of a canopy part. FIG. 17 is an exploded perspective view showing a state in which a closed portion is inserted into the frame portion of FIG. 16; It is the disassembled perspective view which looked at the canopy part of FIG. 16 from diagonally downward.

Hereinafter, embodiments of the present invention will be described based on the drawings. However, the embodiments shown below exemplify the configuration for embodying the technical concept of the present invention, and the present invention is not specified to the following. Moreover, the members shown in the claims are not limited to the members of the embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention thereto alone, unless specifically described otherwise. It is only an illustrative example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for the sake of clarity. Further, in the following description, the same names and reference numerals indicate the same or the same members, and the detailed description will be appropriately omitted. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and one member is used in common as a plurality of elements, or conversely the function of one member is realized by a plurality of members It can be shared and realized. In addition, the contents described in some examples and embodiments may be applicable to other examples and embodiments.

The power supply device shown below mainly demonstrates the example applied to the drive power supply of electric vehicles, such as an electric vehicle and an electric cart which drive | works only by a motor. It should be noted that the power supply device of the present invention may be used in a hybrid vehicle traveling with both an engine and a motor, or in applications requiring a large output other than electric vehicles, for example, storage devices for home use and factories Good.
(Embodiment 1)

The power supply device 100 according to the first embodiment is shown in FIGS. In these figures, FIG. 1 is a perspective view showing a power supply apparatus 100 according to an embodiment of the present invention, FIG. 2 is a perspective view of the power supply apparatus 100 of FIG. 4 is an exploded perspective view of the power supply apparatus 100 of FIG. 3 as viewed obliquely from below, and FIG. 5 is a cross-sectional view of the power supply apparatus 100 of FIG. 1 taken along line VV. The power supply device 100 shown in these figures has a box-like outer shape, and is provided with a handle 28 at the top. The box-like power supply device 100 is in the form of a vertically long rectangular parallelepiped, and the bottom surface thereof is flat and can stand upright. The power supply device 100 internally connects a plurality of battery cells in series and / or in parallel to enable output of power to the outside. As shown in FIG. 2 and FIG. 4 etc., an output terminal 33 is provided on the bottom surface, and the output terminal 33 is connected to a power supply target device such as an electric car to supply power. Further, the user can hold the handle portion 28 to attach and detach the power supply device 100.

The power supply device 100 includes a storage case 10, a canopy 20, a bottom cover 30, and a battery assembly 40, as shown in the exploded perspective views of FIGS. The storage case 10 is hollow and has an upper surface and a lower surface so that the battery assembly 40 can be stored inside. The case first opening 11 on the upper surface side of the storage case 10 is closed by the canopy 20. Further, the case second opening 12 on the lower surface side of the storage case 10 is closed by the bottom cover 30. The storage case 10 is preferably made of metal excellent in heat dissipation and strength. For example, it is made of aluminum, iron, stainless steel or the like which is light in weight and excellent in design.
(Heat dissipation sheet 2)

As shown in the exploded perspective views of FIG. 3 and FIG. 4, the battery assembly 40 has the heat dissipation sheet 2 and the aramid fiber sheet 3 disposed on the side surface, and is in a state covered with the heat dissipation sheet 2 and the aramid fiber sheet 3 Are stored in the storage case 10. The heat dissipation sheet 2 is formed of a flexible member having excellent thermal conductivity, and for example, a silicone resin sheet can be used. By interposing the heat dissipation sheet 2 between the side surface of the battery assembly 40 and the inner surface of the storage case 10, the formation of a gap between the battery assembly 40 and the storage case 10 is suppressed. Thereby, an air layer is formed and it becomes a heat insulation layer, and the situation where heat dissipation of the battery assembly 40 is inhibited can be avoided.
(Aramid fiber sheet 3)

The aramid fiber sheet 3 prevents the surface of the battery assembly 40 and the storage case 10 from being scraped off at the contact portion when the battery assembly 40 is stored in the storage case 10, thereby preventing the generation of powdery foreign matter. , A thin flexible sheet material having excellent strength is used. For example, an aramid-based paper sheet is suitably used as the aramid fiber sheet 3.
(Battery assembly 40)

The battery assembly 40 is a member in which a plurality of secondary battery cells 1 are accommodated. As shown in the sectional view of FIG. 5 and the exploded perspective views of FIGS. 6 and 7, the battery assembly 40 is surrounded by a plurality of metal plates 50 and mechanically fastened. Specifically, the battery assembly 40 has a rectangular parallelepiped outer shape. The rectangular parallelepiped battery assembly 40 has a top surface 41, a bottom surface 42, and a side surface 43. The top surface 41 and the bottom surface 42 are spaced apart in a substantially parallel posture. Further, the side surface 43 connects them between the top surface 41 and the bottom surface 42. And the metal plate 50 is each arrange | positioned at each edge which comprises the rectangular parallelepiped shape of this battery assembly 40. As shown in FIG. Further, the metal plates 50 are fixed to each other at the four corners of the top surface 41 and the bottom surface 42 of the battery assembly 40 with the end portions of the metal plates 50 overlapped. With such a configuration, the rectangular parallelepiped shape of the battery assembly 40 is securely fixed and stably held, and the occurrence of resonance and rattling can be suppressed. In addition, since the fixing positions are collected on the top surface 41 and the bottom surface 42, the fixing operation can be easily performed collectively, and the workability at the time of assembly is improved.

The battery assembly 40 does not have to have a complete rectangular shape, but may have a shape or size that can be stored in the storage case 10, and may have a partially cut out or protruding shape. The battery assembly 40 shown in FIG. 6, FIG. 7, etc. has a shape in which one side of the bottom surface 42 is cut away. By providing the notches 47, members such as the output terminal 33 can be disposed as shown in FIG.

The battery assembly 40 accommodates a plurality of secondary battery cells 1 as shown in the exploded perspective views of FIGS. Each secondary battery cell 1 is housed in a battery holder 44. In this example, the battery holder 44 is configured by stacking 42 cylindrical secondary battery cells 1. The battery holder 44 is made of resin or the like. The secondary battery cell 1 is provided with electrodes on the end face of the cylindrical outer can. Further, they are stacked in a posture in which the end faces of the secondary battery cells 1 are aligned, and these are connected in series or in parallel by the lead plate 45 or the like. For the secondary battery cell 1, for example, a lithium ion secondary battery, a nickel hydrogen secondary battery, a nickel cadmium secondary battery or the like can be used. Further, the secondary battery cell 1 is not limited to a cylindrical one, and other shapes, for example, a secondary battery cell having a rectangular outer can or a laminated secondary battery cell can also be applied.
(Pin part 46)

The metal plates 50 are fixed by the pin portion 46. The pin portion 46 penetrates and fixes the metal plate 50 in a state in which the end portions of the metal plates 50 overlap each other at the four corners of the top surface 41 and the bottom surface 42 of the battery assembly 40. However, a screw hole or the like for fixing the pin portion 46 is not provided on the battery assembly 40 side, and the metal plate 50 is fastened from the outside of the battery assembly 40. As a result, it is possible to prevent the occurrence of resonance due to dimensional tolerances regarding the positions of the screw holes and the like on the battery assembly 40 side, and manufacturing errors of screw screw sizes, etc. The plate 50 can be pressed and fastened.

Each metal plate 50 forms a through hole at each of the four corners of the top surface 41 and the bottom surface 42 of the battery assembly 40, at the end where the adjacent metal plates 50 overlap with each other. Thereby, it becomes easy to fix metal plates 50 comrades arrange | positioned by each side of the rectangular battery assembly 40 reliably by pinning. As a result, each side can be reinforced by the metal plate 50, so that it can be stably held against vibration and impact from each direction, and the occurrence of resonance and rattling can be suppressed.

The through hole can be used as a screw hole for inserting a screw. Further, by forming a screw groove on the side surface of the pin portion 46, it can be fixed to the screw hole by screwing using a nut, and the fixing operation can be easily performed. In this example, on the top surface side of the battery assembly 40, the pin portion 46 is screwed to a nut inserted into the canopy 20. Further, on the bottom surface side, the pin portion 46 is inserted into the bottom lid portion 30 and a nut is screwed.
(Band part 51)

The metal plate 50 is comprised of a plurality of band portions 51 and a reinforcing plate 56 as shown in the exploded perspective views of FIGS. 6 and 7. In the band 51, of the sides constituting the battery assembly 40, at least partially adjacent sides in the vertical direction, that is, the sides where the side surfaces 43 of the battery assembly 40 are joined to each other. cover. The band 51 may cover not only the side in the vertical direction but also part of the side in the horizontal direction. In the example shown in the exploded perspective views of FIG. 6 and FIG. 7, each band portion 51 is configured by a pair of side surface holding portions 52 and a connecting side 53 connecting upper ends of the side surface holding portions 52.
(Side support 52)

As shown in the exploded perspective views of FIG. 6 and FIG. 7, the side supporting part 52 includes adjacent first and

second surfaces

52 a and 52 b covering the sides of the battery assembly 40. Furthermore, the tip of the first surface 52a is bent at a first bending line 52d to form a first bending surface 52c, and a part of the bottom surface 42 of the battery assembly 40 is covered.

Further, the first surface 52a of the side surface holding portion 52 is formed wider in the width direction intersecting the extension direction than the second surface 52b. Further, among the side surfaces 43 of the battery assembly 40, the first surfaces 52a of the plurality of band portions 51 are disposed on the first side surface 43A. Furthermore, among the side surfaces 43 of the battery assembly 40, the second surfaces 52b are disposed on the second side surface 43B adjacent to the first side surface 43A. In the battery assembly 40 shown in FIGS. 6 to 8, the surface on which the lead plate 45 is disposed is taken as the second side surface 43B.

The pair of side supporting members 52 at least partially cover the vertical side, and one connecting side 53 covers the horizontal side. Here, the connection side 53 covers the side in which the reinforcing plate 56 is not disposed among the sides in the horizontal direction that constitute the top surface 41 of the battery assembly 40. It is preferable that the side surface holding portion 52 and the connection side 53 be integrally configured. As a result, as shown in FIG. 10, the band 51 can be formed in a U-shape, and the battery assembly 40 can be held so as to be sandwiched by the side support 52, thereby improving the assembly workability. The mechanical strength can be improved by unifying the member holding the one side and the member holding the side of the side surface 43.
(Reinforcement plate 56)

The reinforcing plate 56 is disposed on the side in the horizontal direction that constitutes the top surface 41 and the bottom surface 42. The reinforcing plates 56 are respectively disposed on two opposing sides of the top surface 41 and the bottom surface 42 as shown in the exploded perspective views of FIGS. 6 and 7. In addition, it is not necessary to arrange | position a connection plate in the edge | side which arrange | positioned the connection edge 53 of the band part 51 among the edge | sides of a horizontal direction. In this sense, the connecting side 53 of the band 51 can be said to be one in which a part of the reinforcing plate 56 is integrated with the pair of side supporting parts 52.

In this manner, by bringing metal plate 50 along each side of battery assembly 40, battery assembly 40 is fastened in a frame shape and pressed so as not to generate an extra gap, etc. to prevent rattling. Do. The reinforcing plate 56 is disposed not along the horizontal side but along the horizontal side. On the other hand, the side surface holding portion 52 of the band portion 51 has an L-shaped cross section so as to cover at least partially the adjacent side surfaces 43 so as to cover the side in the vertical direction. Further, the connecting side 53 of the band portion 51 also has an L-shaped cross section so as to straddle the top surface 41 and the side surface 43 of the battery assembly 40 so as to cover the side in the horizontal direction. This is because, in fixing the metal plate 50, as shown in FIG. 10, with the upper surface of the metal plate 50 fixed in advance to the canopy 20, the side support 52 is expanded to the left and right, and the upper surface of the battery assembly 40 is When the bottom surface 42 of the battery assembly 40 is fixed with the pin portion 46 by bringing the side surface holding portion 52 into contact with the side surface 43 of the battery assembly 40 from this state, the side surface holding portion 52 It is a structure for positioning so that the side 43 of 40 may be covered reliably. By so doing, the side surface 43 of the battery assembly 40 is reliably held by the L-shaped cross section of the side surface holding portion 52, and the metal plate 50 is arranged on each side including the side surface 43 of the battery assembly 40. Then, this is securely fastened to prevent the occurrence of resonance.

The reinforcing plate 56 can also bend the side edge along the extension direction, as shown in the exploded perspective views of FIGS. 6 and 7. This allows the ribs 57 to stand on the side edges of the reinforcing plate 56 to increase its mechanical strength.

The metal plate 50 and the reinforcing plate 56 can be preferably made of iron, aluminum, stainless steel or the like.
(Screw hole)

As described above, the through hole of the metal plate 50 for inserting the pin portion 46 can be used as a screw hole for inserting and fixing a screw. A connection side screw hole 54 and a bending side screw hole 55 are opened as band side screw holes on both ends of the connection side 53 of the band 51 and the first bent surface 52c. Further, plate side screw holes 58 are opened at both ends of the reinforcing plate 56. These screw holes constitute a connecting mechanism for fixing the band 51 to the battery assembly 40, the canopy 20, the bottom lid 30, etc. by means of the pin 46.

As shown in the exploded perspective views of FIG. 6 and FIG. 7, the band portion 51 passes through the pin portion 46 from the lower side of the connection side screw hole 54 on both sides of the connection side 53 in the upper surface of the battery assembly 40. The plate side screw hole 58 opened in the reinforcing plate 56 is inserted and screwed into the canopy 20. On the other hand, on the lower surface of the battery assembly 40, screws are inserted from above the first bent surface 52c into the plate side screw holes 58 respectively opened at both ends of the reinforcing plate 56, and the bottom lid 30 is penetrated. Afterward, fix by screwing the nut. As described above, the upper part of the battery assembly 40 is screwed from the lower side to the upper side, and the lower part is screwed from the upper side to the lower side. As a result, screwing or the like can be screwed on the upper surface side of the canopy 20 without exposing a screw head or the like, and an advantage that direct screwing into the battery assembly 40 can be obtained can be obtained.

A bent side screw hole 55 is opened in the first bent surface 52 c of the first surface 52 a of each band 51. In addition, the second surface 52b cuts out a certain area from the first bending line 52d. In this state, each band 51 is inserted through the bent side screw hole 55 and fixed to the bottom surface 42 of the battery assembly 40 by screwing. Thereby, the four band portions 51 can be fixed from the bottom surface 42 of the battery assembly 40, and the workability is improved.

Further, the reinforcing plate 56 has plate side screw holes 58 opened on both sides of the plate shape. Then, the screws formed at the four corners of the bottom surface 42 and the top surface 41 of the battery assembly 40 and passing through the bent side screw holes 55 of the band 51 are passed through the plate side screw holes 58 of the reinforcing plate 56 and separated. Passed between the screws and fixed.

As shown in the enlarged perspective view of FIG. 11, the side supporting portion 52 is cut away so that the second surface 52b does not exist near the first bending line 52d at the boundary between the first surface 52a and the second surface 52b. . As a result, it is possible to relieve the stress on the corner where stress is likely to be concentrated, and the band 51 can be protected.
(Example 2)

However, the side surface holding unit is not limited to the above configuration. In the power supply device 100 according to the first embodiment shown in FIG. 11 described above, the second surface 52b of the side surface holding portion 52 is omitted in the vicinity of the first bending surface 52c, so that the corner portion of the first bending curve 52d is Stress concentration is relieved.

On the other hand, adding another member makes it possible to further improve the resistance to stress concentration. For example, in a corner of a rectangular parallelepiped battery assembly in which stress concentration is intense in structure, in order to further alleviate stress concentration, it is possible to make a structure in which a region corresponding to an inner corner of the side support is notched. Here, a side surface holding portion 52 'of the power supply device according to the second embodiment is shown in the perspective view of FIG. Side surface holding part 52 'shown to this figure is equipped with 1st surface 52a' and 2nd surface 52b 'similarly to FIG. The first surface 52a 'is provided with a first bent surface 52c' which bends its end at a first bending line 52d 'and covers a part of the bottom surface 42 of the battery assembly 40. The first bent surface 52c 'opens a bent side screw hole 55'.

Further, the second surface 52b 'is a second bent surface that covers a part of the bottom surface 42 of the battery assembly 40 in a state where its end is bent at a second bending line 52f and folded with the first bent surface 52c'. 52e 'is provided. The second bent surface 52e 'opens a second bent side screw hole 55b'. The second bent side screw hole 55b 'is matched with the bent side screw hole 55' of the first bent surface 52c 'so that the pin portion can be inserted and fixed. Here, the pin portion is fixed by screwing as a screw. In the boundary between the first surface 52a 'and the second surface 52b', the vicinity of the first fold line 52d 'and the second fold line 52f' is cut out. As a result, it is possible to relieve the stress on the corner where stress is likely to be concentrated, and the band 51 'can be protected. That is, the battery assembly 40 is provided with the first bent surface 52c 'at the end of the first surface 52a' of each band 51 'and the second bent surface 52e' at the end of the second surface 52b '. The top surface 41 of the battery assembly 40 is covered by covering the bottom surface 42 and a part of the top surface 41 with the second folding surface 52 e ′ in a state of being folded over the first folding surface 52 c ′ and screwing together. The band 51 'is fixed on the bottom surface 42 to enhance the integrity.
(Assembly guide rib 32)

Further, at least one of the canopy 20 and the bottom cover 30 has a plurality of assembly guiding ribs 32 in contact with the battery assembly 40 spaced from each other and project from the inner surface. By providing such an assembly guide rib 32, the gap between the storage case 10 and the battery assembly 40 is filled simultaneously with the fitting of the storage case 10, and the battery assembly 40 and the storage case 10 are integrated. As a result, it is possible to prevent the occurrence of rattling due to the occurrence of a gap between the storage case 10 and the battery assembly 40, thereby suppressing the occurrence of resonance.

In the present embodiment, as shown in FIG. 13 and FIG. 14, the canopy 20 and the bottom cover 30 are respectively formed with a first rib 32A and a second rib 32B as the assembly guide ribs 32. These assembly guide ribs 32 are tapered so that the end edges become wider toward the opening end. As a result, as shown in FIGS. 15A to 15B, the battery assembly 40 can be easily drawn into the assembly guide rib 32 and easily inserted. In addition, the metal plate 50 is formed in advance with a rib whose edge is bent, and the rib is configured to partially cover the side surface of the battery assembly 40 when the battery assembly 40 is fitted. The assembly guide rib 32 presses the rib, and the battery assembly 40 can be fitted to the canopy 20 and the bottom cover 30 with more uniform stress.

In addition, the assembly guide ribs 32 are respectively formed on opposing portions of the inner surface of the canopy 20 and the bottom lid 30. When the canopy 20 and the bottom cover 30 have a rectangular shape, the assembly guide ribs 32 are formed on opposite sides. In the example shown in FIG. 13 and FIG. 14, the assembly guide ribs 32 are formed on the sides forming the rectangular shape of the canopy 20 and the bottom lid 30. However, the assembly guide ribs 32 formed on each side and the assembly guide ribs 32 formed on the same side do not have to have the same shape, and have a shape of a portion that abuts and holds the battery assembly 40. It can be suitably changed together. The plurality of aggregate guide ribs 32 are formed in parallel to each other and spaced apart from each other. Each assembly guide rib 32 is formed in an L shape in a side view. Preferably, the assembly guide rib 32 is integrally formed on the canopy 20 and the bottom cover 30.

In addition, it may have a corner portion which is disposed at a corner of the inner surface of the canopy 20 and is formed separately from the canopy 20. The corner has a third guiding rib. As a result, by combining the assembly guide ribs 32 at the corners of the inner surface of the canopy 20 which is difficult for injection molding as a separate member, the assembly guide ribs 32 can be disposed at the corners as well, thereby forming gaps at the corners. Can be avoided, and the occurrence of rattling and resonance can be suppressed.
(Canopy part 20)

The canopy 20 is fixed to the upper surface of the storage case 10 and closes the case first opening 11 of the storage case 10. Moreover, the canopy part 20 is equipped with the handle part 28 for a user to hold on the upper part. Here, an exploded perspective view of the canopy 20 is shown in FIG. 16 to FIG. In these figures, FIG. 16 is an exploded perspective view of the canopy, FIG. 17 is an exploded perspective view showing the closed portion inserted in the frame of FIG. 16, and FIG. 18 is a perspective view of the canopy of FIG. The exploded perspective view is shown, respectively. The canopy 20 shown in these figures is divided into three members, and includes a cover 21 as a first case, a closure 22 as a second case, and a frame 23 as a third case. Ru.
(Frame part 23)

The frame portion 23 is connected to the case first opening 11 of the storage case 10. The frame portion 23 has a handle frame 24 that constitutes a part of the handle portion 28. Therefore, the frame portion 23 uses a high strength resin so as to cause the handle frame 24 to exhibit sufficient mechanical strength. Further, the handle portion 28 can be reinforced in terms of the structure by raising a rib or the like. However, the appearance is degraded by increasing the mechanical strength. Therefore, the cover 21 is covered on the upper surface of the frame 23.
(Cover part 21)

The cover portion 21 covers the upper surface of the frame portion 23 including the handle frame 24. By covering the frame portion 23 with the cover portion 21 as described above, the upper surface of the frame portion 23 can be hidden without being exposed to the outside. In other words, the upper surface of the frame portion 23 can adopt a configuration specialized for improving the strength without worrying about the appearance. On the other hand, by improving the appearance design of the cover portion 21, the appearance of the canopy 20 can be improved. As described above, since the frame portion 23 emphasizing the strength of the handle portion 28 and the cover portion 21 emphasizing the designability of the external appearance are provided as separate members, it is possible to achieve both the strength and the external appearance.

As described above, by forming the canopy 20 with a plurality of members, the function of reinforcing the handle 28, the function of improving the design of the canopy 20, and the buildup of the resin material constituting the canopy 20 are eliminated. Thus, it is possible to perform the function of avoiding the deterioration of the appearance due to the resin shrinkage and the like. That is, conventionally, since the canopy portion is constituted by one member, if the strength of the handle portion 28 is to be improved, the designability is deteriorated, and if the resin member is thickened to increase the strength, the resin is hardened. There is a problem that the shrinkage that occurs sometimes increases and the appearance quality decreases. Therefore, the appearance can be improved and the appearance can be improved by preparing the frame portion 23 in which the strength is emphasized and by covering the frame portion 23 or preparing the bar portion to give the cover portion 21 a design.

The frame portion 23 forms a frame opening 25 communicating with the case first opening 11 in a state of being connected to the storage case 10. Further, the handle frame 24 of the frame portion 23 is formed in a posture crossing the frame opening 25. In the example shown in FIG. 16 to FIG. 18, the frame 23 is a rectangular shape along the periphery of the case first opening 11, and the handle opening 24 is a T shape in plan view. It is provided in the state of bridging. Further, the lower side of the upper horizontal bar 26 forming the T-shape is opened at the side.
(Occlusion section 22)

Furthermore, in the canopy unit 20, the closing unit 22 is disposed between the frame unit 23 and the cover unit 21, and the closing unit 22 closes the frame opening 25. As a result, while the handle frame 24 crossing the frame opening 25 is formed, the frame opening 25 is closed by the closed portion 22 of another member, which facilitates molding of the frame 23. Furthermore, by using the cover portion 21 forming the bottom surface seen through the frame opening 25 as a separate member, it is possible to design in consideration of the designability of the cover portion 21 such as color and shape.

In addition, the blocking portion 22 is formed in a curved shape in which the center is depressed. As a result, when the user grips the handle portion 28, a wide space for inserting a hand can be secured to facilitate gripping. Also, by eliminating the edge of the step as a curved surface, a feeling of use can be obtained without the inserted hand hitting the edge. In addition, the design is also improved by the curved surface shape. In addition, an opening is provided under the horizontal bar 26, and the closed portion 22 located below the horizontal bar 26 is formed low at this portion, and the opposite side is formed high. When the foreign matter is collected, the side of the horizontal bar 26 is inclined downward so that the foreign matter accumulated in the recess of the closed portion 22 can be smoothly discharged through the opening.

Further, as shown in FIG. 1, FIG. 16, FIG. 17, etc., the cover portion 21 forms a frame-shaped cover frame 27 on the side surface thereof. The cover frame 27 is continuous with the curved surface of the cover portion 27 from the cover frame 27 so that the cover frame 27 becomes flush with the cover portion 22 in a state where the cover portion 21 and the cover portion 22 are joined. To change. As a result, when the user inserts a hand in an attempt to grip the handle portion 28, the hand can be guided more smoothly.

These canopy parts 20 are preferably made of a lightweight resin with excellent insulation. For example, PBT (polybutylene terephthalate), PC (polycarbonate) resin, etc. can be suitably used. Moreover, you may be comprised with a different member taking advantage of the ability to comprise the canopy part 20 by several members. For example, the frame portion 23 may be made of a resin of high strength or a metal of more excellent rigidity. Further, the color of the members can also be different among the members. For example, the lid of the blocking portion 22 can be configured in a different color to produce a change in variation, such as a different color product.

The cover portion 21 is fixed by screwing from the back surface side of the frame portion 23, as shown in FIGS. Thus, the canopy 20 has an outer shape that does not expose the screw holes. On the other hand, the bottom cover 30 is fixed by a screw from the bottom surface 42 as shown in FIG. However, the screw hole can be closed by the screw cover 34 to prevent the screw from being exposed.

The power supply device according to the present invention can be suitably used as a power supply device for an electric cart, an electric scooter, an electric car, a hybrid car and the like. In addition, a backup power supply that can be mounted in a rack of a computer server, a backup power supply for a wireless base station such as a mobile phone, a storage power for household use and a factory, a power supply for street lights, etc. It can also be suitably used for backup power sources such as traffic lights.

100 Power supply device 1 Secondary battery cell 2 Heat dissipation sheet 3 Aramid fiber sheet 10 Storage case 11 Case first opening 12 Case second opening 20 canopy portion 21 cover portion 22 block portion 23 ... frame 24 ... handle frame 25 ... frame opening 26 ... horizontal bar 27 ... cover frame 28 ... handle 30 ... bottom lid 32 ... aggregate guide rib 32A ... first rib 32B ... second rib 33 ... output Terminal 34: Screw cover 40: Battery assembly 41: Top surface 42: Bottom surface 43: Side surface; 43A: First side surface; 43B: Second side surface 44: Battery holder 45: Lead plate 46: Pin portion 47: Notch portion 50 ... Metal plate 51, 51 '... Band part 52, 52' ... Side surface holding part; 52a, 52a '... First surface; 52b, 52b' ... Second surface; 52c, 52c '... First bent surface; 52d, 52d '... 1st fold; 52e' ... 2nd fold Surface: 52f '... second bending curve 53 ... connection side 54 ... connection side screw hole 55, 55' ... bending side screw hole; 55b '... second bending side screw hole 56 ... reinforcement plate 57 ... rib 58 ... plate Side screw hole

Claims

A battery assembly including one or more battery cells, having an outer shape of a rectangular parallelepiped, and having a top surface and a bottom surface separated in a parallel state, and a side surface connecting the top surface and the bottom surface;
A band portion having an L-shaped horizontal cross section covering four sides connecting corresponding apexes of the top surface and the bottom surface of the battery assembly;
A storage case having at least one surface opened for storing the battery assembly whose four sides are covered by the band portion;
A power supply comprising
Each band portion includes a first surface and a second surface adjacent to each other covering the side of the battery assembly,
The first surface includes a first bent surface that bends an end thereof with a first bending line to cover a part of the bottom surface of the battery assembly,
The second surface includes a second bent surface that covers a part of the bottom surface of the battery assembly in a state where the end portion is bent at a second bending line and folded with the first bent surface,
The power supply device formed by notching the vicinity of the said 1st bending line and a 2nd bending line in the boundary of the said 1st surface and a 2nd surface.
The power supply device according to claim 1,
A bent side screw hole is opened in the first bent surface,
A second bent side screw hole is opened in the second bent surface,
The power supply device in which each band part is fixed by screwing which made the said bending side screw hole and the 2nd bending side screw hole penetrate.
The power supply device according to claim 2,
Each band portion is provided with the first bent surface at the end of the first surface, and the second bent surface at the end of the second surface,
The power supply device which covers a part of bottom face and top face of the above-mentioned battery assembly with the 2nd folding surface in the state where it overlaps with the 1st folding surface respectively, and is fixed by screwing.
The power supply device according to claim 3,
Each band part is
Among the sides where the side faces are adjacent, a pair of side surface holding portions that at least partially cover a pair of adjacent sides, respectively;
A connecting side which connects the side supporting parts at both ends and which covers a part of the side constituting the top surface,
Are integrally configured,
The power supply device which forms the said 1st surface and a 2nd surface in each side surface holding | maintenance part.
The power supply device according to any one of claims 2 to 4, wherein
The power supply device, wherein the first surface is formed wider in the width direction intersecting the extension direction than the second surface.
The power supply device according to any one of claims 2 to 5, wherein
The first surfaces are disposed on a first side surface of the side surfaces of the battery assembly,
The power supply device, wherein the second surfaces are disposed on a second side surface adjacent to the first side surface among the side surfaces of the battery assembly.
The power supply device according to any one of claims 2 to 6, further comprising:
Plate side screw holes are opened on both sides of the plate shape,
The screws formed at the bottom and top corners of the power supply unit and having the bent side screw holes and the second bent side screw holes are passed through the plate side screw holes and between the separated screws A power supply device comprising a pair of reinforcing plates arranged parallel to each other for fixing over.
The power supply device according to claim 7, wherein
The said reinforcement plate is a power supply device arrange | positioned in parallel with the said 1st side surface.
The power supply device according to any one of claims 1 to 8, wherein
The battery assembly is formed in a vertically long rectangular shape,
A power supply device in which each band portion is disposed to cover the long side of the rectangular battery assembly.
The power supply device according to claim 9, wherein
The power supply device in which the said battery assembly is formed in the shape which notched a part of rectangular short side.
The power supply device according to any one of claims 1 to 10, wherein
Power supply device in which each band part is made of metal.
A box-shaped battery assembly having a top surface and a bottom surface, the battery assembly including one or more battery cells;
A band portion having an L-shaped horizontal cross section covering four sides connecting corresponding apexes of the top surface and the bottom surface of the battery assembly;
A storage case having at least one surface opened for storing the battery assembly whose four sides are covered by the band portion;
A power supply comprising
Each band portion includes a first surface and a second surface adjacent to each other covering the side of the battery assembly,
The first surface includes a first bent surface that bends an end thereof with a first bending line to cover a part of the bottom surface of the battery assembly,
The said 2nd surface is a power supply device which notches a fixed area | region from the said 1st bending line.