JP4720150B2 - Assembled battery - Google Patents

Description

  The present invention relates to an assembled battery in which a plurality of batteries are housed in an assembled battery case.

  A conventional assembled battery in which a plurality of large-capacity batteries are combined is often housed in a box-shaped assembled battery case surrounded by a side plate on the bottom plate (see, for example, Patent Document 1). .) FIG. 5 shows a configuration example of a conventional assembled battery in which four such large large-capacity long cylindrical nonaqueous electrolyte secondary batteries 1 are combined. The nonaqueous electrolyte secondary battery 1 is a battery in which a power generation element is housed in a long cylindrical outer case made of a stainless steel plate together with a nonaqueous electrolyte. The power generation element is obtained by winding positive and negative electrodes in a long cylindrical shape via a separator, and is housed in the outer case with the winding axis facing in the vertical direction. The outer case is a battery case 1a, which is a long cylindrical container made of stainless steel plate, and is fitted with an oblong lid plate 1b made of stainless steel plate after the power generation element is stored, and the inside is sealed. The positive and negative terminals 1c and 1c protrude upward from both ends of the lid plate 1b. These terminals 1c and 1c penetrate through the lid plate 1b and are attached with insulation sealing, and are connected to the positive and negative electrodes of the power generation element inside the battery case 1a.

  The four nonaqueous electrolyte secondary batteries 1 are used as an assembled battery by arranging them in the assembled battery case 2 side by side in the front-rear direction and wiring each terminal 1c. The assembled battery case 2 is formed by bending a square metal plate into a U-shaped cross section, and fitting another square metal plate to the front and rear ends inside the U-shape and joining them by welding. Is formed in a box shape. In addition, a spacer such as a resin sheet is disposed between the inner surfaces of the nonaqueous electrolyte secondary battery 1 and the assembled battery case 2 to be accommodated and between the nonaqueous electrolyte secondary batteries 1 in order to fill insulation and gaps. .

  However, when the above assembled battery is subjected to a large acceleration G in the front-rear direction due to vibration or impact, all of the forces generated by the four heavy nonaqueous electrolyte secondary batteries 1 are either metal before or after the assembled battery case 2. In order to join the plate, there is a problem that it is necessary to increase the strength of the assembled battery case 2. That is, for example, when receiving a large acceleration G forward, each non-aqueous electrolyte secondary battery 1 pushes the rear non-aqueous electrolyte secondary battery 1 with a force obtained by multiplying its mass by the acceleration G. The non-aqueous electrolyte secondary battery 1 at the rear end presses the metal plate on the rear side of the assembled battery case 2 with a force four times as large as the force pushed from the front. And, in order to increase the strength of the assembled battery case 2 so as to be able to counter this large force, it is necessary to make the metal material of the metal plate high in strength or thicken the plate. Weight increases. Moreover, in order to increase the strength of the joint portion by welding, for example, in the case of FIG. 5, it is necessary to fold the end portions of the front and rear metal plates so that the joint area is widened. It becomes bigger than necessary.

  The non-aqueous electrolyte secondary battery 1 has a large number of electrodes wound in the shape of a long cylinder of the power generation element that overlaps in the front-rear direction between the flat side surfaces of the battery container 1a. Will be repeated. Moreover, when the internal pressure of the nonaqueous electrolyte secondary battery 1 rises, the flat side surfaces of the battery container 1a swell most. For this reason, since the assembled battery has a width (length in the front-rear direction) between the flat side surfaces of the battery container 1a of each non-aqueous electrolyte secondary battery 1 that may swell with use, The metal plates before and after the assembled battery case 2 are also strongly pressed by the swelling, so that it is necessary to increase the strength.

  The present invention provides an assembled battery in which a partition wall is provided in the assembled battery case to disperse the force with which the battery presses the assembled battery case so that the assembled battery case does not become heavier or larger than necessary. Is to provide.

  The invention according to claim 1 is an assembled battery in which a plurality of batteries are housed in an assembled battery case having a bottom plate and a side plate. The assembled battery is erected from the bottom plate, has a height lower than that of the side plate, and the side plate inner surface. The assembled battery case is partitioned into two or more places by a partition wall in which the height of both end portions connected to each other gradually increases to the height of the side plate.

  The invention of claim 2 is an assembled battery in which a plurality of batteries are housed in an assembled battery case provided with a bottom plate and a side plate, and the thickness of both end portions standing from the bottom plate and connected to the inner surface of the side plate is about the end portion. The assembled battery case is partitioned into two or more locations by partition walls that gradually become thicker on both sides in a rounded shape.

  The invention according to claim 3 is that the partition wall erected from the bottom plate is lower in height than the side plate, and the height of both end portions connected to the inner surface of the side plate is gradually rounded to the height of the side plate toward the end portion. In addition, the thickness of both ends connected to the inner surface of the side plate gradually increases toward both ends in a rounded manner toward the end.

  The invention of claim 4 is characterized in that an assembled battery case mounting portion provided with a mounting means to the assembled battery installation portion is provided on the outer wall of the side plate of the assembled battery case.

  According to a fifth aspect of the present invention, there is provided a battery pressing member mounting portion in which mounting means for mounting a battery pressing member that presses and fixes a battery stored in the assembled battery case is provided on the outer wall of the side plate of the assembled battery case. It is characterized by being protruded.

  The invention according to claim 6 is characterized in that a connector housing portion containing a connector connected to a battery terminal housed in the assembled battery case is attached to the outer wall of the side plate of the assembled battery case.

  According to the first aspect of the present invention, since the assembled battery case is partitioned by the partition walls, the force with which the battery presses the assembled battery case is supported not only by the side plates but also by the partition walls even when subjected to a large acceleration G. Thus, the pressing force by the battery is dispersed. Moreover, since this partition is lower than a side plate and the height of both ends is gradually increased in a rounded shape and connected to the side plate, it is easy to connect the terminals of adjacent batteries with a conductor. Therefore, since the strength of the assembled battery case is increased in this assembled battery, the weight does not become unnecessarily heavy or large, and wiring between the batteries becomes easy.

  According to the invention of claim 2, since the inside of the assembled battery case is partitioned by the partition walls, the force with which the battery presses the assembled battery case is supported not only by the side plates but also by this partition wall even when subjected to a large acceleration G. Thus, the pressing force by the battery is dispersed. The partition wall also functions as a rib in the assembled battery case, and the plate thickness at both ends gradually increases in a rounded shape and is connected to the side plate. The overall strength can also be increased. Therefore, in this assembled battery, since the strength of the assembled battery case is increased, the weight is not increased or increased more than necessary.

  According to the invention of claim 3, since the inside of the assembled battery case is partitioned by the partition walls, the force with which the battery presses the assembled battery case is supported not only by the side plates but also by this partition wall even when subjected to a large acceleration G. Thus, the pressing force by the battery is dispersed. Moreover, since this partition is lower than a side plate and the height of both ends is gradually increased in a rounded shape and connected to the side plate, it is easy to connect the terminals of adjacent batteries with a conductor. In addition, this partition wall also functions as a rib in the assembled battery case, and the plate thickness at both end portions gradually increases in a rounded shape and is connected to the side plate, so that the function as this rib is reinforced and the assembled battery case The overall strength can also be increased. Therefore, since the strength of the assembled battery case is increased in this assembled battery, the weight does not become unnecessarily heavy or large, and wiring between the batteries becomes easy.

  According to the invention of claim 4, since the assembled battery case mounting portion is provided on the side plate of the assembled battery case, the assembled battery can be securely installed and fixed to the assembled battery installation portion.

  According to the invention of claim 5, since the battery pressing member can be securely attached by the battery pressing member attaching portion provided on the side plate of the assembled battery case, the battery housed in the assembled battery case is securely fixed firmly. Will be able to.

  According to the invention of claim 6, since the connector housing portion is attached to the side plate of the assembled battery case, the wiring between the plurality of batteries and the connector can be gathered in the connector housing portion. It becomes possible to prevent the wiring for connection from becoming complicated.

  Hereinafter, the best embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, an assembled battery using eight large non-aqueous electrolyte secondary batteries 1 having a large large capacity and a long cylindrical shape having the same configuration as that shown in FIG. 5 will be described. As shown in FIG. 1, this assembled battery stores four non-aqueous electrolyte secondary batteries 1 arranged in front and rear in two rows on the left and right sides and is fixed by being pressed from above by battery pressing bars 3 and 3. It is supposed to be. The four nonaqueous electrolyte secondary batteries 1 in each row are arranged side by side so that the flat side surfaces of the front and rear of the outer case face each other.

  As shown in FIG. 2, the assembled battery case 2 is formed by forming a high-strength aluminum alloy in a container-like housing, and stands from a substantially square bottom plate 2a and peripheral edges on the front, rear, left and right sides of the bottom plate 2a. And four side plates 2b surrounding the bottom plate 2a. And the inside of the assembled battery case 2 surrounded by these side plates 2b is partitioned into four container parts by forming the cross-shaped partition walls 2c, 2c crossing each other in a cross shape. . The partition wall 2c in the left-right direction is provided so as to divide the assembled battery case 2 into the front and rear portions equally by being erected from the bottom plate 2a in the center between the front and rear side plates 2b and 2b. Both ends are connected to the inner surfaces of the left and right side plates 2b, 2b. In addition, the front-rear partition wall 2c is erected from the bottom plate 2a in the center between the left and right side plates 2b, 2b so as to equally divide the assembled battery case 2 left and right. Both ends are connected to the inner surfaces of the front and rear side plates 2b, 2b. And these partition walls 2c and 2c cross | intersect in the cross shape, and the inside of the assembled battery case 2 will be equally divided into four substantially rectangular container parts of front and rear, right and left.

  The bottom plate 2a of the assembled battery case 2 has a relatively large radius at the corners of the four corners of the quadrangle, and the corners of the borders of the front, rear, left and right side plates 2b are also relatively curved along the radius of the bottom plate 2a. The corners of the boundary between the bottom plate 2a and the side plates 2b are also curved and connected. The partition walls 2c and 2c are slightly lower than the height of the side plates 2b, and the heights of both ends connected to the inner surfaces of these side plates 2b gradually increase to the height of the side plates 2b toward the ends. ing. Therefore, as will be described later, wiring between the nonaqueous electrolyte secondary batteries 1 housed in the four container portions partitioned by the partition walls 2c and 2c is facilitated. Further, the partition walls 2c and 2c are connected in a rounded shape with the plate thicknesses of the crossing portion, the portion connecting to the inner surface of the side plate 2b, and the portion connecting to the upper surface of the bottom plate 2a gradually increasing. Therefore, the assembled battery case 2 has the strength of the assembled battery case 2 as a housing and the strength of the partition wall 2c as compared to the case where the square bottom plate 2a, the side plate 2b, and the partition wall 2c are formed to be connected straight and at right angles. Try to be high. In addition, since the assembled battery case 2 is formed by cutting out the whole from one block of aluminum alloy, the bottom plate 2a, the side plates 2b, and the partition walls 2c are joined by welding the plate materials. In comparison, not only does the strength of the joint increase, but there is no possibility that the shape of the housing will be distorted by welding.

  On the left and right sides of the upper end of the outer wall of the front and rear side plates 2b, 2b of the assembled battery case 2, battery pressing bar mounting portions 2d, which are projecting outwardly formed with two bolting holes, project from each other. ing. Further, at the lower end of the outer wall of the side plates 2b, 2b in the front-rear direction of the assembled battery case 2, there are projecting portions outwardly formed with bolting holes at three positions that are equally spaced in the left-right direction. An assembled battery case mounting portion 2e is formed. The lower surfaces of these assembled battery case mounting portions 2e protrude slightly downward from the lower surface of the bottom plate 2a. In addition, the bottom surface of the bottom plate 2a between the two sets of the left and right sides of the assembled battery case mounting portions 2e and 2e that are paired in the front and rear is also flush with the lower surfaces of these assembled battery case mounting portions 2e and 2e. A bottom rib 2f that protrudes to the bottom is formed to reinforce the assembled battery case 2 in particular at the bottom. The assembled battery case mounting portion 2e is configured such that a bolt passed through the bolt fixing hole is screwed into a screw hole of the assembled battery installation portion, or a nut is screwed from below through the bolt fixing hole of the assembled battery installation portion. By wearing it, it is used to install and fix the assembled battery in this assembled battery installation section. By using the assembled battery case mounting portion 2e provided in such an assembled battery case 2, the assembled battery can be securely installed and fixed.

  As shown in FIG. 1, the assembled battery case 2 having the above structure accommodates two nonaqueous electrolyte secondary batteries 1 in four container portions partitioned by the partition walls 2c and 2c. These non-aqueous electrolyte secondary batteries 1 are accommodated so that the flat side surface of the long cylindrical outer case faces the front-rear direction and the cover plate 1b faces the upper side. Therefore, two nonaqueous electrolyte secondary batteries 1 are housed side by side in each container part partitioned by these partition walls 2c, 2c. In addition, an inter-battery spacer 4 made of a resin plate is disposed between the two non-aqueous electrolyte secondary batteries 1 housed in the respective container portions in this way, and a backlash occurs due to a gap. I am trying not to. In the present embodiment, actually, an insulating sheet for insulation and a rubber sheet as an impact buffering material are laid on the bottom plate 2a of each container part of the assembled battery case 2, and a non-aqueous electrolyte 2 is formed on the insulating sheet. The secondary battery 1 is placed.

  In the assembled battery case 2 in which the nonaqueous electrolyte secondary battery 1 is housed in this way, the battery pressing bars 3 and 3 are respectively attached to the two battery pressing bar mounting portions 2d and 2d that are paired in the front-rear direction. It is done. Each battery pressing bar 3 is a plate material made of a high-strength aluminum alloy and is long in the front-rear direction. The bolts are passed through two bolting holes formed at both ends, and these bolts are attached to the battery pressing bar. The bolts are passed through the bolting holes of the portions 2d and 2d and fixed by screwing and tightening a hexagon nut (not shown) from below. The battery pressing bars 3 and 3 are attached to the lower surface with a rubber plate 5 interposed. Therefore, each non-aqueous electrolyte secondary battery 1 housed in the assembled battery case 2 is pressed against the cover plate 1b from above by the battery pressing bar 3 through these rubber plates 5, and is pressed and fixed to the bottom plate 2a side. Will be. Since these battery pressing bars 3 are fixed to the battery pressing bar attaching portion 2d provided in the assembled battery case 2, the batteries in the assembled battery can be securely and firmly fixed.

  In addition, a connector housing portion 6 is attached to the outer wall of the right side plate 2b of the assembled battery case 2 in which the nonaqueous electrolyte secondary battery 1 is housed in this manner. The connector housing portion 6 is formed by forming a metal plate into a box shape by sheet metal processing, and is attached and fixed by screwing into a screw hole drilled in the outer wall of the right side plate 2b. The connector housing 6 is configured such that a connector (not shown) is attached to a hole formed in the plate surface protruding from the attachment portion. Wiring is provided between these connectors and the terminals 1 c and 1 c of the nonaqueous electrolyte secondary battery 1 housed in the assembled battery case 2. These nonaqueous electrolyte secondary batteries 1 are connected in series, for example, by connecting and fixing a connection bar (not shown) between the terminals 1c and 1c. Therefore, the connector of the connector housing 6 supplies power to the outside from the nonaqueous electrolyte secondary battery 1 housed in the assembled battery case 2 and charges the nonaqueous electrolyte secondary battery 1 from the outside. It becomes an assembled battery terminal. When the connector housing portion 6 is attached to the side plate 2b of the assembled battery case 2 in this way, the wiring between the nonaqueous electrolyte secondary battery 1 and the connector can be collected in the connector housing portion 6. It is possible to prevent the wiring for connecting the battery and the outside from becoming complicated.

  With the above configuration, even if the assembled battery of this embodiment receives a large acceleration G in the front, rear, left, and right, the force by which each nonaqueous electrolyte secondary battery 1 presses the assembled battery case 2 is not only the side plate 2b but also the partition walls 2c and 2c. However, it comes to be supported, and the pressing force by these nonaqueous electrolyte secondary batteries 1 can be dispersed. That is, for example, when a large acceleration G is applied to the front, if the partition wall 2c, 2c is not formed in the assembled battery case 2, it corresponds to the mass of each nonaqueous electrolyte secondary battery 1 for each row. Thus, the force of the nonaqueous electrolyte secondary battery 1 for each of these four pieces in total is applied to the rear side plate 2b. However, since the left and right partition walls 2c are formed in the assembled battery case 2 of the present embodiment, even when receiving a large forward acceleration G in this way, the two on the front side for each row. The combined force of the nonaqueous electrolyte secondary battery 1 is supported by the partition wall 2c, and only the combined force of the two nonaqueous electrolyte secondary batteries 1 on the back side is applied to the rear side plate 2b. Thus, the pressing force by the acceleration G can be dispersed and supported. This also applies to the case where a large acceleration G is applied backward. Further, for example, if the battery case 2 is not formed with the partition walls 2c and 2c even when a large acceleration G in the left direction is received, a total of eight non-aqueous electrolytes are provided in the left and right two rows. All the force from the secondary battery 1 is applied to the right side plate 2b. However, since the front and rear partition walls 2c are formed in the assembled battery case 2 of the present embodiment, even when a large acceleration G in the left direction is received in this way, each left side non-water The pressing force of the electrolyte secondary battery 1 is supported by the partition wall 2c, and only the pressing force of the right non-aqueous electrolyte secondary battery 1 is applied to the right side plate 2b. It becomes possible to disperse and support the pressing force of. This also applies to the case where a large acceleration G in the right direction is applied.

  Moreover, in the present embodiment, the front and rear direction and left and right partition walls 2c and 2c are connected in a cross shape so that the nonaqueous electrolyte secondary battery 1 is connected to the front and rear partition walls 2c and the left and right side plates 2b and 2b, for example. When the pressing force is applied, the center of these front and rear partition walls 2c and the left and right side plates 2b and 2b can be supported by the left and right partition walls 2c as ribs, and the left and right partition walls 2c and the front and rear side plates 2b and 2b can be supported. Even when a pressing force from the nonaqueous electrolyte secondary battery 1 is applied to 2b, the partition wall 2c in the left-right direction and the center of the front and rear side plates 2b, 2b can support the ribs 2c in the front-rear direction as ribs. The strength of the battery case 2 as a whole can be increased, and the nonaqueous electrolyte secondary battery 1 can be firmly supported by the partition walls 2c and the side plates 2b.

  In addition, since each of the nonaqueous electrolyte secondary batteries 1 is housed so that the flat side surface of the long cylindrical outer case faces the front-rear direction, the power generation elements of these nonaqueous electrolyte secondary batteries 1 are also long. The flat portion of the electrode wound in a cylindrical shape overlaps in the front-rear direction. Therefore, these non-aqueous electrolyte secondary batteries 1 have side surfaces of the outer case in the direction orthogonal to the winding axis, particularly the front and back flat side surfaces, due to the expansion and contraction of the electrodes due to charge and discharge and the increase in the battery internal pressure. Since it swells or dents, the dimension of the exterior case in the front-rear direction may increase. However, in the assembled battery of this embodiment, the front-rear dimension of the two nonaqueous electrolyte secondary batteries 1 on the front side for each row is formed by forming the left and right partition walls 2c in the assembled battery case 2. The pressure due to the expansion of is supported by the left and right partition walls 2c and the front side plate 2b, and the pressure due to the expansion in the longitudinal direction of each of the two nonaqueous electrolyte secondary batteries 1 on the rear side is Can be supported by the partition wall 2c and the rear side plate 2b. For example, when the pressure by each non-aqueous electrolyte secondary battery 1 is biased and applied as a large force forward or backward, Thus, it is possible to prevent the pressing force by the four nonaqueous electrolyte secondary batteries 1 in each row from being concentrated on the side plate 2b on either side.

  In the above embodiment, the assembled battery case 2 and the like are made of a high-strength aluminum alloy (such as duralumin) for weight reduction, but this material is not particularly limited as long as sufficient strength is obtained. Further, the number of nonaqueous electrolyte secondary batteries 1 housed in the assembled battery case 2 and the number of arrangement columns thereof are not limited to the above embodiment.

  Moreover, in the said embodiment, although the case where the battery press bar 3 was used in order to press and fix the nonaqueous electrolyte secondary battery 1 accommodated in the assembled battery case 2 from upper direction was shown, this battery press member is It is not limited to the battery pressing bar 3, for example, it may be a lid plate shape, and instead of pressing the lid plate 1b of the non-aqueous electrolyte secondary battery 1, the terminals 1c and 1c may be pressed. . Further, in the above-described embodiment, the bolting hole is formed in the battery pressing bar mounting portion 2d in order to mount the battery pressing member, but this mounting means is also optional. Further, the number and position of the battery pressing bar attaching portions 2d protruding from the outer wall of the side plate 2b of the assembled battery case 2 are not limited.

  Further, the assembled battery case 2 is not necessarily required to be substantially rectangular as long as it is a container-like housing provided with a bottom plate 2a and a side plate 2b that stands up from the peripheral edge of the bottom plate 2a and surrounds the periphery. Further, the assembled battery case 2 may be manufactured by casting such as die casting if it is a mass-produced product. If the casing can be prevented from being distorted, for example, a bottom plate 2a and a side plate 2b made of a plate material are used. And the partition wall 2c can be welded to each other. That is, the partition wall 2c may be erected integrally with the bottom plate 2a, or may be erected by being joined by welding or the like. And this partition 2c may be connected integrally also to the inner surface of the side plate 2b, or may be joined and connected by welding or the like.

  Moreover, in the said embodiment, although the case where the assembled battery case 2 was installed and fixed to the assembled battery installation part by the assembled battery case attachment part 2e in which the hole for bolting was formed was shown, this assembled battery case attachment part 2e is the assembled battery. The attachment means for installing and fixing to the installation part is not limited to such bolting holes. Further, the number and position of the assembled battery case mounting portions 2e protruding from the outer wall of the side plate 2b of the assembled battery case 2 are not limited.

  Further, in the above embodiment, the case where the assembled battery case 2 is formed by crossing the front and rear partition walls 2c and 2c in a cross shape is shown, but only one partition wall 2c may be provided. For example, in the case of the assembled battery case 2 in which only one row of the nonaqueous electrolyte secondary batteries 1 is stored as in the conventional example shown in FIG. 5, only the left and right partition walls 2c are provided. Thus, for example, even if only the partition wall 2c in the left-right direction is provided, the partition wall 2c is not only in the case of receiving the acceleration G in the front-rear direction orthogonal to this but also in the case of receiving the acceleration G in the left-right direction. The left and right side plates 2b, 2b can function as ribs that support the central portion. Furthermore, any one or both of these partition walls 2c in the front-rear direction and the left-right direction can be formed in two or more.

Moreover, in the said embodiment, although the case where R was provided in the partition 2c, the baseplate 2a, and the side plate 2b of the assembled battery case 2 was shown, the corner | angular part of this baseplate 2a, this baseplate 2a and the sideplate 2b, or the side plates 2b and 2b of 2 surfaces. Even if there are no rounded corners, substantially the same effect can be obtained. Then, the partition walls 2c, as shown in FIG. 3, lower than at least the side plates 2b, if the height of both ends if connected to the inner surface of the side plate 2b gradually higher in a round shape as shown in radius R ₁ Thus, a connection bar or the like can be easily connected and fixed between the terminals 1c and 1c of the nonaqueous electrolyte secondary battery 1 accommodated in the four container portions partitioned by the partition walls 2c and 2c. Further, the partition wall 2c, as shown in FIG. 4, even entirely be formed at the same height as the side plate 2b, at least the plate thickness at the boundary portion between the side plates 2b, gradually as shown in Earl R ₂ If they are thick and connected on both sides in a round shape, the strength of the assembled battery case 2 as a housing and the strength of the partition walls 2c can be increased. Furthermore, if the partition wall 2c, 2c intersect are, if connected thickened in these intersections also rounded R ₃ as shown in gradually rounded shape, it is possible to further improve this strength.

  Moreover, in the said embodiment, although the case where the connector accommodating part 6 which consists of a metal plate was attached to the outer wall of the side plate 2b of the assembled battery case 2 was shown, the structure of this connector accommodating part 6 is arbitrary, for example, casting is used. It can be used or made of a material other than metal.

  Moreover, although the said embodiment demonstrated the nonaqueous electrolyte secondary battery 1 using the long cylindrical winding type electric power generation element, the shape of this winding is arbitrary. Furthermore, this power generation element is not limited to a wound type, and may be a laminated type. Furthermore, in the said embodiment, although the assembled battery using the nonaqueous electrolyte secondary battery 1 was demonstrated, the kind of this battery is not limited.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembled perspective view illustrating a configuration of an assembled battery according to an embodiment of the present invention. 1 is a partial longitudinal sectional perspective view showing a structure of an assembled battery case according to an embodiment of the present invention. The one embodiment of the present invention is a plan view (a) and a longitudinal sectional front view (b) showing another configuration example of the assembled battery case. FIG. 5 is a plan view (a) and a longitudinal sectional front view (b) showing still another example of the configuration of the assembled battery case, showing an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembled perspective view illustrating a configuration of an assembled battery according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nonaqueous electrolyte secondary battery 2 Assembly battery case 2a Bottom plate 2b Side plate 2c Partition

Claims (6)

In an assembled battery in which a plurality of batteries are housed in an assembled battery case having a bottom plate and a side plate,
The assembled battery case is erected from the bottom plate by a partition wall whose height is lower than that of the side plate and whose height of both ends connected to the inner surface of the side plate gradually increases to the height of the side plate toward the end. An assembled battery that is partitioned into two or more locations. In an assembled battery in which a plurality of batteries are housed in an assembled battery case having a bottom plate and a side plate,
The assembled battery case is divided into two or more places by partition walls that are erected from the bottom plate and that are thickened on both sides in a rounded manner toward the ends. battery.   The partition wall erected from the bottom plate has a height lower than that of the side plate, and the height of both end portions connected to the inner surface of the side plate gradually increases to the height of the side plate toward the end portion. 3. The assembled battery according to claim 1, wherein the thickness of both end portions connected to each other is gradually increased toward both ends in a rounded manner toward the end portion. 4.   4. The assembled battery according to claim 1, wherein an assembled battery case attaching portion provided with means for attaching to the assembled battery installation portion is provided on the outer wall of the side plate of the assembled battery case.   A battery pressing member mounting portion provided with mounting means for mounting a battery pressing member that presses and fixes a battery housed in the assembled battery case is protruded from the outer wall of the side plate of the assembled battery case. The assembled battery according to claim 1, 2, 3, or 4.   The connector storage part which accommodated the connector connected with the terminal of the battery accommodated in the assembled battery case was attached to the outer wall of the side plate of the said assembled battery case. 5. The assembled battery according to 5.

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