JP5527374B2 - Assembled battery - Google Patents

Description

  The present invention relates to an assembled battery (battery module) in which a plurality of single cells (battery cells) are electrically connected to form a module.

  Patent Document 1 discloses an assembled battery having a configuration in which a plurality of single cells arranged in a row are sandwiched and fixed between a pair of side plates from the front and rear in the arrangement direction.

  Patent Document 2 discloses an assembled battery having a configuration in which a plurality of single cells are arranged in a box-like case having an open upper end and the case opening is closed by a lid.

  In the case of the configuration of Patent Document 1, if the number of single cells in the arrangement direction is increased or decreased, a relatively simple design change is possible, but a change in the arrangement of other single cells requires a large design change. . In the case of the configuration of Patent Document 2, it is necessary to change the design of both the case and the lid in order to change the arrangement of the single cells. The case and the lid are generally made of resin, and it becomes necessary to newly manufacture an expensive mold for molding as the design changes. As described above, the conventional assembled battery has a low degree of freedom in the arrangement of the single cells including the cost limitation, and it is difficult to realize small-scale and multi-product production at a low cost.

JP 2003-346745 A JP 2010-15760 A

  This invention makes it a subject to improve the freedom degree of arrangement | positioning of a cell in an assembled battery.

  The first invention includes a plurality of unit cells, a first cap mounted on one end side including external terminals of the individual unit cells, and the one end including the external terminals of the unit cells. A first sandwiching portion disposed on the part side and a second sandwiching portion disposed on the other end portion side of the unit cell, wherein the first sandwiching portion is interposed via the first cap. By sandwiching the plurality of unit cells, the plurality of unit cells are sandwiched and held between the first and second sandwiching portions, and the first cap is fitted into the first sandwiching portion. An assembled battery is provided. Preferably, the first cap includes a first convex portion, and the first holding portion includes a first concave portion into which the first convex portion is fitted.

The second invention includes: a plurality of unit cells, before Symbol a first holding part disposed at one end of which comprises an external terminal of the cell, and the one end portion side of each of said unit cells Comprises a second cap mounted on the opposite side of the other end, and a second clamping part disposed on the other end side of the unit cell, wherein the second clamping part is the second clamping part. By sandwiching the plurality of unit cells through two caps, the plurality of unit cells are sandwiched and held between the first and second sandwiching portions, and the second cap is disposed on the second cap. Provided is an assembled battery that fits into a holding portion. Preferably, the second cap includes a second convex portion, and the second holding portion includes a second concave portion into which the second convex portion is fitted.

  The plurality of single cells constituting the assembled battery include a first sandwiching portion disposed on one end side provided with the external terminal and a second sandwiching disposed on the other end side opposite to the external terminal. And is held between the two parts. Therefore, even when the number and arrangement of the cells constituting the assembled battery are changed, the shape and size of the first and second holding portions do not need to be significantly changed as long as the cells can be sandwiched. The degree of freedom of arrangement is high.

  Vibration resistance and impact resistance can be improved by fitting at least one of the first and second caps to the corresponding clamping portion.

  According to the assembled battery of the present invention, the first holding portion disposed on one end side provided with the external terminal and the second holding portion disposed on the other end side opposite to the external terminal are provided. Since a plurality of single cells are sandwiched and held between them, a high degree of freedom can be obtained with respect to the arrangement of the single cells, and small-scale, multi-product production can be realized at low cost.

The disassembled perspective view of the assembled battery of 1st Embodiment of this invention. The perspective view which looked at the assembled battery of 1st Embodiment from upper direction. The perspective view which looked at the assembled battery of 1st Embodiment from the downward direction. The typical top view which shows the connection path | route of the cell in the assembled battery of 1st Embodiment. The typical top view which shows the connection path | route at the time of changing arrangement | positioning of the cell in the assembled battery of 1st Embodiment. The typical top view which shows the connection path | route at the time of changing arrangement | positioning of the cell in the assembled battery of 1st Embodiment. The perspective view of a cell, an upper cap, and a lower cap. The expanded sectional view of the upper cap with which the cell was equipped. The expanded sectional view of the lower cap with which the cell was equipped. The perspective view which looked at the upper cap from the upper part. The perspective view which looked at the upper cap from the upper direction at a different angle from FIG. 8A. The perspective view which looked at the lower cap from the lower part. The perspective view which looked at the lower cap from the upper part. The perspective view which looked at the lower cap from the lower part. The disassembled perspective view of the assembled battery of 2nd Embodiment of this invention. The perspective view which looked at the assembled battery of 2nd Embodiment from upper direction. The perspective view which looked at the assembled battery of 2nd Embodiment from the downward direction. The typical top view which shows the connection path | route of the cell in the assembled battery of 2nd Embodiment. The typical top view which shows the connection path | route at the time of changing arrangement | positioning of the cell in the assembled battery of 2nd Embodiment. The typical top view which shows the connection path | route at the time of changing arrangement | positioning of the cell in the assembled battery of 2nd Embodiment. The typical top view of the assembled battery of 3rd Embodiment of this invention. The typical top view of the modification of the assembled battery of 1st Embodiment. The typical top view of the modification of the assembled battery of 2nd Embodiment.

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

(First embodiment)
1 to 4C show an assembled battery (battery module) 1 according to the first embodiment of the present invention. The assembled battery 1 includes seven prismatic single cells (battery cells) 2 which are nonaqueous electrolyte secondary batteries.

  With further reference to FIGS. 5 to 7, each single cell 2 accommodates a power generation element 4 (schematically shown in FIGS. 6 and 7) together with an electrolyte in the battery container 3, and the upper end of the battery container 3. The side opening is sealed with a lid 5.

  The battery case 3 in the present embodiment includes side walls 3b to 3e extending upward from the rectangular bottom wall 3a. The side walls include a pair of long side walls 3b, 3c facing each other and a pair of short side walls 3d, 3e facing each other with a smaller area than the long side walls 3b, 3c. Of the four sides of the rectangle formed by the bottom wall 3a when the battery container 3 is viewed in plan, the long side walls 3b and 3c extend from the pair of long sides, and the short side walls 3d and 3e extend from the pair of short sides. The lid 5 is also generally rectangular, and the battery container 3 and the lid 5 constitute a substantially flat rectangular parallelepiped exterior body. Positive and negative external terminals 7 </ b> A and 7 </ b> B are disposed near both ends of the lid 5 of the unit cell 2. The outer periphery of the side walls 3b to 3e of the battery container 3 is covered with an insulating sheet (not shown).

  As shown most clearly in FIG. 4A, the seven unit cells 2 constituting the assembled battery 1 are arranged in a line. Specifically, when viewed from the lid 5 side (side on which the external terminals 7A and 7B are provided), the longitudinal directions L of the battery containers 3 of the two unit cells 2 adjacent to each other are substantially parallel to each other. In this arrangement (parallel arrangement), seven unit cells 2 are arranged in a line. In other words, the seven unit cells 2 are arranged such that the other adjacent unit cells 2 face the long side walls 3b and 3c with a gap therebetween. The external terminals 7A and 7B of each unit cell 2 are electrically connected to the external terminals 7A and 7B of other adjacent unit cells 2 by a bus bar (conductive member) 8, and the seven unit cells 2 are connected in series. It is connected to the. 4A, the external terminal 7A of the leftmost unit cell 2 constitutes the positive electrode of the assembled battery 1, and the external terminal 7B of the rightmost unit cell 2 constitutes the negative electrode of the assembled battery 1.

  As shown in FIGS. 5 and 6, the heads (not shown) of the external terminals 7 </ b> A and 7 </ b> B and the connecting rods 10 </ b> A and 10 </ b> B are accommodated in the packings 9 </ b> A and 9 </ b> B attached to the upper surface of the lid 5. ing. The shaft portions 7a of the external terminals 7A and 7B formed with male screws protrude upward from the head and pass through the connecting rods 10A and 10B. A through hole 8a at one end of the bus bar 8 is inserted into the shaft portion 7a of the external terminals 7A and 7B, and one end of the bus bar 8 is fixed by a nut 11. The connecting rods 10 </ b> A and 10 </ b> B are connected to a current collector (not shown) in the battery container 3 by rivets 12, and the current collector is connected to the power generation element 4.

  Each of the connecting rods 10A and 10B includes a narrow rectangular inspection terminal portion 10a at one end (the end opposite to the external terminals 7A and 7B). As shown most clearly in FIG. 5, the inspection terminal portion 10 a protrudes laterally from the packings 9 </ b> A and 9 </ b> B and is positioned above the upper surface of the lid 5 with a gap. A screw hole 10b for screwing a screw (not shown) for connecting an electric wire is provided near the tip of the inspection terminal portion 10a.

  The assembled battery 1 includes a holding structure 20 for holding the seven unit cells 2 in the above-described arrangement. The holding structure 20 includes an upper cap (first cap) 21 and a lower cap (second cap) 22 that are attached to each unit cell 2. The upper cap 21 and the lower cap 22 are made of resin in this embodiment. In addition, the holding structure 20 includes an upper clamping part (first clamping part) 23 and a lower clamping part (second clamping part) that sandwich and hold the cell 2 fitted with the upper cap 21 and the lower cap 22 in the vertical direction in the figure. Part) 24. Furthermore, the holding structure 20 includes a pair of side portions 25 and 26 that connect the upper holding portion 23 and the lower holding portion 24. A monitoring device 37 is attached to one side portion 25.

  The upper cap 21 will be described with reference to FIGS. 5, 6, and 8A to 8C. Two upper caps 21 are attached to the upper end side of the unit cell 2 so as to cover the pair of external terminals 7A and 7B, respectively. The upper cap 21 includes a rectangular top wall portion 21a, front wall portions 21b and rear wall portions 21c extending from the front and rear sides of the top wall portion 21a, and side wall portions 21d and 21e extending from the left and right sides of the top wall portion 21a. Is provided. A rib structure 21f is provided on the lower surface of the top wall 21a.

  By placing the lower end of the front wall portion 21b and the lower end near the rear wall portion 21c of the rib structure 21f on the upper end of the battery container 3, the upper cap 21 is held in a state of being attached to the unit cell 2. The upper cap 21 attached to the unit cell 2 surrounds the external terminals 7A and 7B and the periphery thereof. Specifically, in a state where the unit cell 2 is mounted, the top wall portion 21a of the upper cap 21 is located above the external terminals 7A and 7B, the upper packings 9A and 9B, and the connection rods 10A and 10B. Further, the rear wall portion 21 c extends along the upper end portions (near the lid 5) of the short side walls 3 d and 3 e of the battery container 3. Furthermore, the side wall portions 21 d and 21 e extend along the upper end portions (near the lid 5) of the pair of long side walls 3 b and 3 c of the battery case 3, respectively. Furthermore, the corner portions 21g and 21h formed by the rear wall portion 21c and the side wall portions 21d and 21e extend along the corner portions formed by the short side walls 3d and 3e and the long side walls 3b and 3c of the battery case 3. ing.

  One upper convex portion (first convex portion) 27 is formed on the upper surface (outer surface) of the top wall portion 21 a of the upper cap 21. The upper convex portion 27 in the present embodiment is a generally flat cylinder as a whole. Specifically, the upper convex portion 27 of the present embodiment is directed toward the foremost end formed at the cylindrical portion 27a having a constant diameter protruding from the upper surface of the top wall portion 21a and the tip (upper end) of the cylindrical portion 27a. And a tapered portion 27b that gradually decreases in diameter. Further, the tip surface 27c of the upper convex portion 27 is substantially flat.

  As shown most clearly in FIG. 6, the external terminals 7 </ b> A and 7 </ b> B are located directly below the upper protrusion 27. An inspection through-hole 28 that penetrates from the front end surface 27 c of the upper convex portion 27 to the lower surface of the top wall portion 21 a of the upper cap 21 is formed. That is, the inspection through hole 28 reaches from the outside of the upper cap 21 to the external terminals 7A and 7B surrounded by the upper cap 21.

  Bus bar openings 29A, 29B, and 29C are provided in the rear wall portion 21c and the side wall portions 21d and 21e of the upper cap 21 so as to penetrate in the thickness direction. These bus bar openings 29 </ b> A to 29 </ b> C are provided to allow the bus bar 8 connected to the external terminals 7 </ b> A and 7 </ b> B to pass through and protrude from the upper cap 21. For example, in FIG. 5, the bus bar 8 having one end connected to the external terminals 7A and 7B is inserted into the bus bar opening 29B of the upper cap 21 and protrudes from the upper cap 21 to the external terminals of other single cells (shown in FIG. 5). (Not shown). In the present embodiment, the bus bar opening 29A is a cut extending from the lower end of the rear wall portion 21c toward the top wall portion 21a, and the bus bar opening portions 29B and 29C are directed from the lower ends of the side wall portions 21d and 21e toward the top wall portion 21a. It is a notch that extends. However, if the bus bar 8 can be inserted, the bus bar openings 29A to 29C may be through holes that penetrate the rear wall 21c and the side walls 21d and 21e in the thickness direction.

  The front wall portion 21b of the upper cap 21 is provided with a terminal opening 31 through which the inspection terminal portion 10a of the connection rod 10A, 10B is inserted in the thickness direction. Most of the connecting rods 10A and 10B are accommodated in the upper packings 9A and 9B. The inspection terminal portion 10a which is a part of the connecting rods 10A and 10B is connected to the upper packing 9 via the terminal openings 31. Projects outward. In the present embodiment, the terminal opening 31 is a cut extending from the lower end of the front wall portion 21b toward the top wall portion 21a. However, if the inspection terminal portion 10a can be inserted, the terminal opening 31 may be a through-hole penetrating the front wall portion 21b in the thickness direction.

  In order to protect the inspection terminal portion 10 a protruding outward from the upper cap 21 through the terminal opening 31, a protection portion 32 is provided on the front wall portion 21 b of the upper cap 21. The protection part 32 in the present embodiment includes a pair of plate-like ribs 33A and 33B extending from both sides of the terminal opening 31 of the front wall part 21b along both sides of the inspection terminal part 10a. Referring to FIG. 5, the upper ends of the ribs 33 </ b> A and 33 </ b> B are located above the inspection terminal portion 10 a (a position away from the lid 5 of the unit cell 2).

  The lower cap 22 will be described with reference to FIGS. 5, 7, 9A, and 9B. The lower cap 22 has an elongated box shape with an upper end opened, and is attached to the lower end side of the battery container 3 of the unit cell 2. Specifically, the lower cap 22 includes a substantially rectangular bottom wall portion 22a and side wall portions 22b, 22c, 22d, and 22e extending from four sides of the bottom wall portion 22a. When the lower cap 22 is attached to the lower end side of the unit cell 2, the bottom wall 3 a of the battery container 3 is placed on the bottom wall part 22 a, and the side wall parts 22 b and 22 c extend along the long side walls 3 b and 3 c of the battery container 3. The side wall portions 22 d and 22 e extend along the short side walls 3 d and 3 e of the battery container 3.

  A pair of lower convex portions 35 are formed on the lower surface (outer surface) of the bottom wall portion 22 a of the lower cap 22. The lower convex portion 35 in the present embodiment is a generally flat cylinder as a whole.

  The upper clamping portion 23 in the present embodiment is an integral structure in which a metal plate is formed into a rectangular shape by press molding or the like, and a circular upper through hole (first concave portion) into which the upper convex portion 27 of the upper cap 21 is fitted. 23a is formed to penetrate in the thickness direction. Referring to FIGS. 1 and 2, a pair of upper caps 21 is attached to each of five unit cells 2 except for two at the left and right ends of the seven unit cells 2 in the figure. Further, in the drawing in which the external terminal 7A is the positive electrode of the assembled battery 1, a left upper unit cell 2 and in the drawing in which the external terminal 7B is the negative electrode of the assembled battery 1, a single upper cap 21 is provided. Is installed. That is, in the present embodiment, the assembled battery 1 includes a total of twelve upper caps 21, and each upper cap 21 includes one upper convex portion 27 as described above. A total of twelve upper through holes 23 a are formed in the upper holding portion 23 at positions corresponding to the upper convex portions 27 of the upper cap 21.

  1 and 2, the corner corresponding to the external terminal 7A of the left cell 2 (the positive electrode of the battery pack 1), the external terminal 7B of the right cell 2 (the negative electrode of the battery cell 1). ) Are provided with notched module openings 23b and 23c in order to expose the external terminals 7A and 7B. Terminal protection covers 36A and 36B are detachably attached to the module openings 23b and 23c.

  The lower clamping part 24 in the present embodiment has a generally integral structure in which a metal plate is formed by press molding or the like. The lower clamping portion 24 has a generally rectangular shape, and has a rectangular vent opening 24a having a large area at the center, and thus has a rectangular frame shape as a whole. A circular lower through hole (second concave portion) 24b into which the lower convex portion 35 of the lower cap 22 is fitted is formed in the lower clamping portion 24 so as to penetrate in the thickness direction. Referring to FIGS. 1 to 3, the lower cap 22 is attached to all of the seven unit cells 2, and each lower cap 22 includes the two lower protrusions 35 as described above. A total of 14 lower through holes 24 b are formed in the lower clamping portion 24 at positions corresponding to the lower protrusions 35.

  Referring to FIGS. 1 to 3, in the upper cap 21 attached to the upper end side of the unit cell 2, the upper convex portion 27 is fitted in the upper through hole 23 a and the top wall portion 21 a is on the lower surface of the upper holding portion 23. It is in contact. On the other hand, in the lower cap 22 attached to the lower end side of the unit cell 2, the lower convex portion 35 is fitted into the lower through hole 24 b and the bottom wall portion 22 a is in contact with the upper surface of the lower holding portion 24. The upper clamping portion 23 and the lower clamping portion 24 are connected to each other by the side portions 25 and 26 in a state where the seven unit cells 2 are sandwiched and held via the upper cap 21 and the lower cap 22. One side portion 25 to which the monitoring device 37 is attached is disposed adjacent to the leftmost unit cell 2 in the drawing, and the other side portion 26 is disposed adjacent to the rightmost unit cell 2 in the drawing. In the present embodiment, the side portions 25 and 26 have a substantially integral structure in which a metal plate is formed into a rectangular shape by press molding or the like. In the present embodiment, the upper ends and the lower ends of the side portions 25 and 26 are connected to the upper holding portion 23 and the lower holding portion 24 with screws. The upper convex portion 27 of the upper cap 21 is fitted into the upper through hole 23a of the upper clamping portion 23, and the lower convex portion 35 of the lower cap 22 is fitted to the lower through hole 24b of the lower clamping portion 24, thereby The connection strength of the unit cell 2 with respect to the part 23 and the lower clamping part 24 is improved, and vibration resistance and impact resistance are improved.

  In the present embodiment, as shown in FIG. 4A, seven unit cells 2 are arranged in a parallel arrangement in which the longitudinal directions L are substantially parallel to each other between the adjacent unit cells 2. A case where the interval between adjacent unit cells 2 is changed to an arrangement (FIG. 4B) that is uniformly enlarged from FIG. 4A will be described. In order to change the arrangement of the unit cells 2, it is necessary to change the position of the upper through hole 23 a of the upper holding part 23 and change the position of the lower through hole 24 b of the lower holding part 24. That is, in correspondence with the increase in the interval between the single cells 2, the interval between the adjacent upper through holes 23a and the interval between the adjacent lower through holes 24b need to be increased in the left-right direction in FIG. However, it is not necessary to change the shapes of the upper cap 21 and the lower cap 22 that are attached to each unit cell 2. Changing the shape of the upper cap 21 and the lower cap 22 made of resin requires a new mold for molding, but the upper clamping portion 23 and the lower clamping portion 24 are formed by press forming a metal plate. Therefore, it is not necessary to newly manufacture a mold for changing the interval between the upper through hole 23a and the lower through hole 24b.

  Even when the arrangement shown in FIG. 4A is changed to an arrangement in which only the distance between the fourth and fifth unit cells 2 from the left end is increased as shown in FIG. 4C, the position of the upper through hole 23a of the upper holding portion 23 is also changed. It is only necessary to change the position of the lower through-hole 24b of the lower clamping part 24, and the shape of the upper cap 21 and the lower cap 22 need not be changed at all.

  When increasing or decreasing the number of single cells 2 in the assembled battery 1 of the first embodiment, the position of the upper through hole 23a of the upper holding part 23 and the lower through hole 24b of the lower holding part 24 may be increased or decreased accordingly. There is no need to change the shapes of the upper cap 21 and the lower cap 22.

(Second Embodiment)
10 to 13A show an assembled battery 1 according to a second embodiment of the present invention. The assembled battery 1 includes eight rectangular unit cells 2 that are the same as those in the first embodiment. Specifically, four unit cells 2 are arranged in two rows. As shown in FIG. 13A, the external terminals 7A and 7B of the individual cells 2 from the unit cell 2 in the lower left corner to the unit cell 2 in the upper left corner are connected to the other unit cells 2 in the same or different rows by the bus bar 8. It is connected to external terminals 7A and 7B, and eight unit cells 2 are connected in series.

  The arrangement of the eight unit cells 2 will be described more specifically. First, these unit cells 2 are arranged in a row by four in parallel arrangement (arrangement in which the longitudinal directions L of the battery containers 3 of the two unit cells 2 adjacent to each other are substantially parallel to each other). Also, two adjacent unit cells 2 belonging to different rows (two unit cells 2 adjacent in the left-right direction in FIG. 13A) are on the lid 5 side (side on which external terminals 7A and 7B are provided). When viewed from, the battery container 3 is arranged in an arrangement (linear arrangement) in which the longitudinal direction L of the battery container 3 is arranged substantially linearly.

  When the arrangement shown in FIG. 13A is changed to an arrangement in which the interval between adjacent unit cells 2 is uniformly enlarged as shown in FIG. 13B, the position of the upper through hole 23a in the upper holding part 23 and the lower holding part 24 are changed. It is necessary to change the position of the lower through hole 24b. That is, in correspondence with the increase in the vertical / horizontal spacing between the single cells 2, the vertical / horizontal spacing of the upper through hole 23 a of the upper holding part 23 and the lower through hole 24 b of the lower holding part 24 is increased. There is a need. However, it is not necessary to change the shapes of the upper cap 21 and the lower cap 22 that are attached to each unit cell 2.

  Even when the arrangement shown in FIG. 13A is changed to an arrangement in which the interval between the second and third unit cells 2 from the top is increased in each row as shown in FIG. What is necessary is just to change the position of the hole 23a and the position of the lower through-hole 24b of the lower clamping part 24, and about the shape of the upper cap 21 and the lower cap 22, no change is required.

  Since other configurations and operations of the second embodiment are the same as those of the first embodiment, the same elements are denoted by the same reference numerals and description thereof is omitted.

(Third embodiment)
FIG. 14 shows an assembled battery 1 according to the third embodiment of the present invention. The assembled battery 1 includes three rectangular cells 2 that are the same as those in the first embodiment. Other structures not shown in FIG. 14 of the assembled battery 1 of the present embodiment are the same as those of the first embodiment. Among the three unit cells 2, the center unit cell 2 and the left unit cell 2 in the drawing have the longitudinal direction L of the battery container 3 intersecting each other when viewed from the lid 5 side (substantially in this example). It is arranged in an arrangement (crossing arrangement) that is orthogonal. Similarly, the central unit cell 2 and the right unit cell 2 are also arranged in an intersecting manner.

  Since other configurations and operations of the third embodiment are the same as those of the first embodiment, the same elements are denoted by the same reference numerals and description thereof is omitted.

  FIG. 15 is a modified example of the assembled battery 1 of the first embodiment, and the two cell cells 2 at the right end in the figure are changed from a parallel arrangement to a cross arrangement. Similarly, FIG. 16 is a modification of the assembled battery 1 of the second embodiment, and the lower two unit cells 2 in the figure are changed from a linear arrangement to an intersecting arrangement. Such a change from the parallel arrangement or the linear arrangement to the cross arrangement can also be realized by setting the position of the upper through hole 23a of the upper holding portion 23 and the position of the lower through hole 24b of the lower holding portion 24. It is not necessary to change the shapes of the upper cap 21 and the lower cap 22 that are attached to the cap.

  The assembled battery 1 is configured to hold and hold the seven unit cells 2 via the upper cap 21 and the lower cap 22 by the upper clamping portion 23 and the lower clamping portion 24. Therefore, as is clear from the first to third embodiments, the number and arrangement (parallel arrangement, straight arrangement, crossing arrangement) of the single cells 2 are formed by pressing metal plates and are relatively inexpensive. The position can be freely set according to the positions of the upper through hole 23a and the lower through hole 24b that can be manufactured. Even when the number and arrangement of the cells 2 are changed, it is not necessary to change the shapes of the upper cap 21 and the lower cap 22 that require a new production of a mold for expensive resin molding. In these respects, the assembled battery 1 can provide a high degree of freedom with respect to the arrangement of the single cells, and low-volume, multi-product production can be realized at low cost.

  Although the upper sandwiching portion 23 and the lower sandwiching portion 24 are integrated in this embodiment, as long as the unit cell 2 can be sandwiched and securely held via the upper cap 21 and the lower cap 22, it may be configured by a plurality of members. Good. Similarly, the side portions 25 and 26 may be composed of a plurality of members as long as the upper clamping portion 23 and the lower clamping portion 24 can be held in the holding state with the unit cell 2 being sandwiched therebetween, and the upper portions are clamped by means other than screwing. You may connect with the part 23 and the lower clamping part 24. FIG. Furthermore, one or both of the side portions 25 and 26 may be integrated with the upper clamping portion 23 and the lower clamping portion 24. In short, the specific configurations of the upper clamping part 23, the lower clamping part 24, and the side parts 25 and 26 are not particularly limited as long as the unit cell 2 can be sandwiched and securely held via the upper cap 21 and the lower cap 22.

DESCRIPTION OF SYMBOLS 1 assembled battery 2 unit cell 3 battery container 3a bottom wall 3b, 3c long side wall 3d, 3e short side wall 4 power generation element 5 lid 7A, 7B external terminal 7a shaft 8 bus bar 8a through hole 9A, 9B packing 10A, 10B connecting rod 10a Inspection terminal portion 10b Screw hole 11 Nut 12 Rivet 20 Holding structure 21 Upper cap 21a Top wall portion 21b Front wall portion 21c Rear wall portion 21d, 21e Side wall portion 21f Rib structure 21g, 21h Corner corner portion 22 Lower cap 22a Bottom wall Part 22b, 22c, 22d, 22e Side wall part 23 Upper clamping part 23a Upper through hole 23b, 23c Module opening part 24 Lower clamping part 24a Ventilation opening 24b Lower through hole 25, 26 Side part 27 Upper convex part 27a Columnar part 27b Taper 27c Tip surface 28 Inspection through hole 29A, 29B, 29C Busbar opening 1 terminal opening 32 protected portion 33A, 33B rib 35 lower protrusions 36A, 36B terminal protection cover 37 monitoring device L longitudinal

Claims (4)

Multiple cells,
A first cap mounted on one end side including an external terminal of each of the unit cells;
A first sandwiching portion disposed on the one end side including the external terminal of the unit cell;
A second sandwiching portion disposed on the other end side of the unit cell,
The first sandwiching portion sandwiches and holds the plurality of single cells between the first and second sandwiching portions by sandwiching the plurality of single cells via the first cap, and An assembled battery in which a first cap is fitted into the first holding portion.   The assembled battery according to claim 1, wherein the first cap includes a first convex portion, and the first sandwiching portion includes a first concave portion into which the first convex portion is fitted. Multiple cells,
A first holding part disposed at one end of which comprises an external terminal before Symbol unit cells,
A second cap mounted on the other end side opposite to the one end side of each unit cell;
A second clamping part arranged on the other end side of the unit cell,
The second sandwiching portion sandwiches and holds the plurality of single cells between the first and second sandwiching portions by sandwiching the plurality of single cells through the second cap, and An assembled battery in which a second cap is fitted into the second holding portion.   The assembled battery according to claim 3, wherein the second cap includes a second convex portion, and the second sandwiching portion includes a second concave portion into which the second convex portion is fitted.

Images