JP2019216054A - Battery module - Google Patents

Abstract

To inhibit a position deviation of a cylindrical battery to prevent and suppress a rotation while achieving a structure capable of inserting smoothly the cylindrical battery into a holder.SOLUTION: A battery module arranges a plurality of cylindrical batteries 1 in a parallel posture to a holder 2. The holder 2 comprises: a first holder 3 and a second holder 4 having holding spaces 31 and 41 that insert both end parts of each cylindrical battery 1; and an intermediate holder 5 laminated between the first holder 3 and the second holder 4. The intermediate holder 5 forms a rubber-like elastic body, and has a plurality of insertion holes 51 inserting each cylindrical battery 1, and is provided with an elastic deformation convex part 6 pressed with an end surface of one of the first holder 3 and the second holder 4 on an opening end surface 52 of each insertion hole 51. In a state of nipping and adhering the intermediate holder 5 with the first holder 3 and the second holder 4 from both surfaces, a front surface of each cylindrical battery 1 is pressed by elastically deforming the insertion hole 51 via the elastic deformation convex part 6 which is elastically deformed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a battery module in which a cylindrical battery is arranged in a fixed position by a holder, and particularly to a battery module in which a holder is arranged so as to prevent displacement of the cylindrical battery and to prevent or suppress rotation. .

  A battery module has been developed in which a plurality of cylindrical batteries are placed in a holding space of a holder and arranged in a parallel posture. It is important that the battery module is arranged at a fixed position on the holder while preventing rotation of the cylindrical battery. This is because, when the cylindrical battery rotates, an unreasonable load may be applied to the joint between the metal plate and the bus bar connecting the batteries in series or in parallel, thereby causing adverse effects such as breakage. A battery module has been developed in which a cylindrical battery is prevented from rotating and placed in a holding space of a holder. (See Patent Document 1)

JP 2010-9798 A

  In a battery module in which a cylindrical battery is arranged so as not to rotate on a holder, a stopper is provided on the holder to come into contact with the surface of the battery, and the stopper is pressed against a cylindrical battery inserted into the holder to prevent rotation. In this battery module, the cylindrical battery cannot be inserted smoothly into the holding space of the holder. This is because the stopper is pressed against the surface of the cylindrical battery inserted into the holder to increase the frictional resistance between the cylindrical battery and the stopper. In particular, when the stopper is pressed strongly against the surface of the cylindrical battery to reliably prevent the rotation of the cylindrical battery, the frictional resistance increases.There is a drawback that the cylindrical battery cannot be inserted smoothly into the holder. .

  The present invention has been developed with the object of overcoming the above disadvantages. One of the objects of the present invention is to realize a structure in which a cylindrical battery can be smoothly inserted into a holder while displacing the cylindrical battery. It is an object of the present invention to provide a battery module that can reliably prevent the rotation of the battery module and can prevent and suppress the rotation.

Means for Solving the Problems and Effects of the Invention

  A battery module according to an embodiment of the present invention includes a plurality of cylindrical batteries 1 and a holder 2 in which each of the cylindrical batteries 1 is arranged in a parallel posture. The holder 2 has a first holder 3 having a holding space 31 for inserting one end of the cylindrical battery 1 and a second holder 4 having a holding space 41 for inserting the other end of the cylindrical battery 1. And an intermediate holder 5 laminated between the first holder 3 and the second holder 4 to hold an intermediate portion of the cylindrical battery 1. The intermediate holder 5 is a rubber-like holder formed by molding a rubber-like elastic body, has a plurality of insertion holes 51 through which the cylindrical battery 1 is inserted, and is laminated on an opening end face 52 of the insertion hole 51. An elastically deforming convex portion 6 is provided which is pressed by the end face of the first holder 3 or the second holder 4. In the battery module, in a state where the first holder 3 and the second holder 4 sandwich the intermediate holder 5 from both sides, the insertion hole 51 is elastically deformed through the elastically deforming convex portion 6 which is elastically deformed. 1 is pressed.

  The above-mentioned battery modules can reliably prevent cylindrical batteries that are placed in fixed positions by the holders, and can prevent or suppress rotation while efficiently inserting cylindrical batteries into the holder and assembling them efficiently. There are features that can be done. That is, the above battery module is stacked between a first holder and a second holder having first and second holders having a holding space for inserting both ends of the cylindrical battery, and a cylindrical shape is formed. A holder is configured by an intermediate holder that holds an intermediate portion of the battery, and the intermediate holder is formed of a rubber-like elastic body, and an elastic deformation convex portion is provided on an opening end surface of an insertion hole through which the cylindrical battery is inserted, In a state in which the intermediate holder is sandwiched between the first holder and the second holder from both sides, the insertion hole is inserted through an elastic deformation convex portion which is elastically deformed by being pressed by an end surface of the first holder or the second holder. This is because the surface of the cylindrical battery is pressed by being elastically deformed.

  In the power supply module having this structure, the intermediate holder is inserted into the intermediate portion of the cylindrical battery, and both ends of the cylindrical battery are inserted into the holding spaces of the first holder and the second holder. In a state of being sandwiched between the first holder and the second holder, the elastically deforming convex portion provided on the intermediate holder is pressed against the end surface of the first holder or the second holder to elastically deform the intermediate holder. By deforming the provided insertion hole, the inner surface of the insertion hole can strongly press and hold the surface of the cylindrical battery. For this reason, when the cylindrical battery is inserted into the holder, it is not necessary to strongly press the surface of the cylindrical battery against the inner surface of the insertion hole of the intermediate holder, and the cylindrical battery can be inserted smoothly into the holder, and the intermediate holder can be inserted from both sides. In a state where the cylindrical battery is disposed at the fixed position of the holder by being sandwiched between the first holder and the second holder, the frictional resistance can be increased by pressing the surface of the cylindrical battery with the inner surface of the deformable insertion hole. In addition, displacement of the cylindrical battery can be reliably prevented, and rotation can be prevented and suppressed.

  In particular, in the above battery module, since the elastically deforming convex portion can be arranged at a fixed position on the opening end face of the insertion hole provided in the intermediate holder, the positional relationship between the first holder or the second holder and the intermediate holder is slightly shifted. However, the intermediate holder can be reliably elastically deformed to a predetermined state via the elastically deforming convex portion pressed by the end face of the first holder or the second holder, and the cylindrical battery can be securely held. That is, by providing an elastically deforming convex portion on the opening end surface of the intermediate holder, the intermediate holder is always elastically deformed into a predetermined shape without being affected by the positional relationship with the first holder and the second holder. The battery can be securely held.

  Further, in the battery module of the present invention, the elastically deforming convex portion 6 can have any one of a truncated pyramid shape, a truncated cone shape, a hemispherical shape, and a semi-elliptical spherical shape.

  According to the above configuration, the elastic deformation convex portion is reliably pressed by the end surface of the first holder or the second holder while reducing the contact pressure between the end surface of the first holder or the second holder and the elastic deformation convex portion. As a result, the intermediate holder can be elastically deformed into a predetermined shape.

  Further, in the battery module of the present invention, the intermediate holder 5 can include a plurality of elastically deforming convex portions 6 at equal intervals along the opening edge of the insertion hole 51.

  According to the above configuration, since a plurality of elastically deforming convex portions are provided at equal intervals along the opening edge of the insertion hole, the surface of the cylindrical battery inserted into the insertion hole is uniformly pressed from the surroundings, and the balance is good. In addition, it can be securely held.

  Further, the battery module of the present invention can have an outer shape in which the elastically deforming convex portion 6 has a protruding portion 6a protruding toward the opposed cylindrical battery 1 in plan view.

  According to the above configuration, since the elastically deforming projection is provided with the protruding portion protruding toward the cylindrical battery opposed thereto, the area opposed to the cylindrical battery inserted into the insertion hole is effectively directed toward the cylindrical battery. It is characterized in that the surface of the cylindrical battery can be reliably pressed by being elastically deformed.

  Further, in the battery module of the present invention, the holder 2 arranges the plurality of cylindrical batteries 1 in a bale-stacking state, and places the cylindrical batteries 1 in adjacent rows between the valleys of the cylindrical batteries 1 arranged in the same row. The holding spaces 31, 41 and the insertion holes 51 are provided in the arrangement to arrange them, and the intermediate holder 5 has a triangular shape in a plan view in a region surrounded by three cylindrical batteries 1 arranged in adjacent rows. The elastically deforming convex portion 6 is provided, and the elastically deforming convex portion 6 serves as a protruding portion 6a that protrudes toward the cylindrical battery 1 with the triangular apex facing the cylindrical battery 1. Can be elastically deformed.

  According to the above configuration, the intermediate holder is surrounded by three cylindrical batteries arranged in adjacent rows while accommodating the cylindrical batteries in a space-saving manner as a structure in which a plurality of cylindrical batteries are arranged in a bale-stacked state. An elastically deforming convex portion having a triangular shape in plan view is provided in a region to be formed, and a top portion of the triangular portion is formed as a protruding portion protruding toward the opposed cylindrical battery, so that it is pressed against the first holder or the second holder. The crushed elastic deformation convex portion is reliably elastically deformed toward the cylindrical battery, so that the cylindrical battery can be pressed more effectively.

  A battery module according to another embodiment of the present invention includes a plurality of cylindrical batteries 1 and a holder 22 in which each of the cylindrical batteries 1 is arranged in a parallel posture. The holder 22 includes a first holder 23 having a holding space 31 for inserting one end of the cylindrical battery 1 and a second holder 24 having a holding space 41 for inserting the other end of the cylindrical battery 1. And an intermediate holder 25 that is stacked between the first holder 23 and the second holder 24 and holds an intermediate portion of the cylindrical battery 1. The intermediate holder 25 is a rubber-like holder formed by molding a rubber-like elastic body, and has a plurality of insertion holes 51 through which the cylindrical battery 1 is inserted. Either or both of the first holder 23 and the second holder 24 are provided on the end surface facing the intermediate holder 25 with the pressing convex portion 7 for locally pressing the opening end surface 52 of the insertion hole 51. The projection 7 has an outer shape having a projection 7a projecting toward the opposed cylindrical battery 1 in plan view. When the first holder 23 and the second holder 24 sandwich the intermediate holder 25 from both sides, the pressing convex portion 7 presses the intermediate holder 25 to elastically deform the insertion hole 51 and the cylindrical shape of the battery module. The surface of the battery 1 is pressed.

  The above-mentioned battery modules can reliably prevent cylindrical batteries that are placed in fixed positions by the holders, and can prevent or suppress rotation while efficiently inserting cylindrical batteries into the holder and assembling them efficiently. There are features that can be done. That is, the above battery module is stacked between a first holder and a second holder having first and second holders having a holding space for inserting both ends of the cylindrical battery, and a cylindrical shape is formed. An intermediate holder that holds an intermediate portion of the battery constitutes a holder. The intermediate holder is formed of a rubber-like elastic body, and one or both of the first holder and the second holder are opposed to the intermediate holder. A pressing convex portion for locally pressing the opening end surface of the insertion hole is provided on the end surface to be inserted, and the intermediate holder is sandwiched between the first holder and the second holder from both surfaces. Is pressed to elastically deform the insertion hole to press the surface of the cylindrical battery.

  In the power supply module having this structure, the intermediate holder is inserted into the intermediate portion of the cylindrical battery, and both ends of the cylindrical battery are inserted into the holding spaces of the first holder and the second holder. In a state of being sandwiched between the first holder and the second holder, the opening end face of the intermediate holder is locally pressed by the pressing protrusion provided on the first holder or the second holder, and the insertion provided on the intermediate holder. Deform the hole. In particular, since the pressing protrusion has an outer shape having a protrusion protruding toward the opposed cylindrical battery in plan view, the pressing protrusion faces the cylindrical battery when the intermediate holder is pressed. The area of the insertion hole is reliably elastically deformed, and the inner surface of the insertion hole can strongly press and hold the surface of the cylindrical battery. For this reason, when the cylindrical battery is inserted into the holder, it is not necessary to strongly press the surface of the cylindrical battery against the inner surface of the insertion hole of the intermediate holder. In the state where the cylindrical battery is disposed at the fixed position of the holder by being sandwiched between the first holder and the second holder, the inner surface of the deformed insertion hole presses the surface of the cylindrical battery to increase the frictional resistance. Thus, displacement of the cylindrical battery can be reliably prevented, and rotation can be prevented or suppressed.

  Further, in the battery module of the present invention, the first holder 23 or the second holder 24 can include a plurality of pressing projections 7 at equal intervals along the opening edges of the holding spaces 31 and 41.

  According to the above configuration, since a plurality of pressing protrusions are provided at equal intervals along the opening edge of the holding space, the opening end surface around the insertion hole of the intermediate holder is pressed evenly through these pressing protrusions. Thereby, the insertion hole is elastically deformed in a well-balanced manner, and the surface of the cylindrical battery disposed in the insertion hole can be pressed uniformly from the periphery and securely held.

  Furthermore, in the battery module of the present invention, the holder 22 arranges the plurality of cylindrical batteries 1 in a bale-stacking state, and places the cylindrical batteries 1 in adjacent rows between valleys of the cylindrical batteries 1 arranged in the same row. Three cylindrical batteries are provided in which the holding spaces 31, 41 and the insertion holes 51 are provided in an arrangement arrangement, and either or both of the first holder 23 and the second holder 24 are arranged in adjacent rows. 1 is provided in a region surrounded by a cylindrical battery 1 having a triangular shape in a plan view. Can be elastically deformed.

  According to the above configuration, the first holder or the second holder is arranged in an adjacent row while storing the cylindrical batteries in a space-saving manner as a structure for arranging a plurality of cylindrical batteries in a bale stack. A pressing projection having a triangular shape in plan view is provided in a region surrounded by the cylindrical batteries, and the top of the triangle is a projection projecting toward the opposed cylindrical battery. Thus, the intermediate battery is elastically deformed toward the opposed cylindrical battery, so that the cylindrical battery can be pressed more effectively.

  Further, in the battery module of the present invention, the inner surfaces of the holding spaces 31 and 41 and the insertion hole 51 are formed into a columnar shape along the surface of the cylindrical battery 1, and the opening edge 53 of the insertion hole 51 is elastically deformed to form a cylindrical shape. It can be pressed against the surface of the battery 1.

  Further, in the battery module of the present invention, the first holder 3, 23 or the second holder 4, 24 is provided with a positioning projection 44 for connecting the intermediate holders 5, 25 in a fixed position. Is provided with a connection hole 54 for guiding the positioning protrusion 44, and the positioning protrusion 44 is inserted into the connection hole 54, and the first holder 3, 23 or the second holder 4, 24 provided with the positioning protrusion 44 is provided. , And the intermediate holders 5 and 25 can be connected at fixed positions.

  Further, in the battery module of the present invention, the first holders 3, 23 and the second holders 4, 24 can be connected to each other via a locking mechanism. The locking mechanism is connected to one of the side surfaces of the first holders 3, 23 and the second holders 4, 24 from the other of the first holders 3, 23 and the second holders 4, 24. A locking hook 35 extending toward the front and a locking portion 45 provided on one of the other side surfaces of the first holders 3 and 23 and the second holders 4 and 24 to lock the locking hook 35. The first hook 3 and the second holders 4 and 24 hold the intermediate holders 5 and 25 in place.

  Furthermore, in the battery module of the present invention, the locking hook 35 has an elastic arm portion 35A extending from one of the side surfaces of the first holders 3, 23 and the second holders 4, 24; The elastic arm 35A is disposed in a posture crossing the side surfaces of the intermediate holders 5 and 25, and the elastic arm 35A is guided to the intermediate holders 5 and 25. The positioning groove 55 can be formed on the side surface.

1 is a perspective view of a battery module according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of a holder of the battery module shown in FIG. 1. FIG. 3 is an exploded perspective view of the holder illustrated in FIG. 2 as viewed from below. FIG. 6 is a vertical sectional view of the battery module accommodating the cylindrical battery, which corresponds to a section taken along line IV-IV of FIG. 5. It is a partially expanded perspective view of an intermediate holder. FIG. 6 is an enlarged plan view of the intermediate holder shown in FIG. It is a partially expanded perspective view which shows another example of an intermediate holder. It is an exploded sectional view showing the state where the elastic deformation convex part of the intermediate holder is pressed by the 2nd holder. It is an exploded perspective view of the holder of the battery module concerning Embodiment 2 of the present invention. FIG. 10 is an exploded perspective view of the holder illustrated in FIG. 9 as viewed from below. It is a vertical sectional view of the holder which stored the cylindrical battery. It is an enlarged bottom view of the 2nd holder shown in FIG. It is an exploded sectional view showing a state where an intermediate holder is pressed by a pressing projection of a second holder.

Hereinafter, the present invention will be described in detail with reference to the drawings. In the following description, terms indicating specific directions and positions (for example, “up,” “down,” and other terms including those terms) will be used as necessary. This is to facilitate understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meaning of the terms. The same reference numerals in a plurality of drawings denote the same or equivalent parts or members.
Further, the embodiments described below show specific examples of the technical idea of the present invention, and do not limit the present invention to the following. In addition, the dimensions, materials, shapes, relative arrangements, and the like of the components described below are not intended to limit the scope of the present invention thereto, unless otherwise specified, and are exemplified. It was intended. Further, what is described in one embodiment or example can be applied to other embodiments or examples. In addition, the size, positional relationship, and the like of the members illustrated in the drawings are exaggerated in some cases in order to make the description clear.

(Embodiment 1)
1 to 4 show a battery module according to Embodiment 1 of the present invention. In these figures, FIG. 1 is a perspective view of the battery module, FIG. 2 is an exploded perspective view of the battery module holder shown in FIG. 1, and FIG. 3 is an exploded view of the battery module holder shown in FIG. FIG. 4 is a perspective view, and FIG. 4 is a vertical sectional view of the battery module of FIG. The battery module 100 shown in FIGS. 1 to 4 includes a plurality of cylindrical batteries 1, a holder 2 in which each cylindrical battery 1 is arranged in a parallel posture, and a cylindrical battery 1 connected in series and parallel. Bus bar 11.

(Holder 2)
The holder 2 has a first holder 3 having a holding space 31 for inserting one end of the cylindrical battery 1 and a second holder 4 having a holding space 41 for inserting the other end of the cylindrical battery 1. And an intermediate holder 5 laminated between the first holder 3 and the second holder 4 to hold an intermediate portion of the cylindrical battery 1. In the holder 2 shown in the figure, the first holder 3 and the second holder 4 are made of resin-molded plastic holders and have a strength to hold a plurality of built-in cylindrical batteries 1 in a predetermined posture. The intermediate holder 5 is a rubber-like holder made of a rubber-like elastic body, and is provided with a plurality of insertion holes 51 through which the cylindrical battery 1 is inserted.

  In the holder 2 shown in the figure, the holding space 31 of the first holder 3, the holding space 41 of the second holder 4, and the insertion hole 51 of the intermediate holder 5 are provided at positions facing each other. The insertion hole 51 constitutes a battery housing for holding each cylindrical battery 1 in a parallel posture. The holder 2 shown in the figure is provided with a plurality of battery storage sections so that a plurality of cylindrical batteries 1 are arranged in a multi-stage and multi-row configuration in a bale-stacked state. The holder 2 in the figure is a holding space for the first holder 3 and the second holder 4 so that the cylindrical batteries 1 in the adjacent rows are arranged in the valleys of the cylindrical batteries 1 arranged in the same row. 31 and 41 and an insertion hole 51 of the intermediate holder 5 are arranged and provided.

(First holder 3, second holder 4)
The first holder 3 and the second holder 4 in FIGS. 2 to 4 are provided with holding spaces 31 and 41 into which both ends of the cylindrical battery 1 are inserted. The inner surfaces of the holding spaces 31 and 41 are columnar along the surface of the cylindrical battery 1, and the inner shape is slightly larger than the outer shape of the cylindrical battery 1 so that the cylindrical battery 1 can be inserted smoothly. For example, the inner diameter is formed larger by 0.1 mm to 0.3 mm than the outer diameter of the cylindrical battery 1. The first holder 3 and the second holder 4 shown in the figure are provided with holding paces 31 and 41 so as to have a depth for accommodating substantially the entirety of the cylindrical battery 1 held by the intermediate holder 5 except for an intermediate portion. ing.

  Further, the first holder 3 and the second holder 4 have electrode windows 33, 43 for exposing the end electrodes of the cylindrical battery 1 to the outside on the bottom surfaces of the holding spaces 31, 41. In the battery module 100 shown in FIG. 1, the end electrodes on both ends of each cylindrical battery 1 exposed from the electrode windows 33 and 43 of the first holder 3 and the second holder 4 are connected to the bus bar 11 via the lead wire 12. are doing. The bus bar 11 shown in the figure is a plate-shaped metal plate, and is arranged between rows of the cylindrical batteries 1 connected in parallel with each other. The bus bar 11 connects the cylindrical batteries 1 arranged in the same row in parallel, and connects the cylindrical batteries 1 in the adjacent row in series.

(Intermediate holder 5)
As shown in FIGS. 5 and 6, the intermediate holder 5 is formed by molding a rubber-like elastic body into a plate having a predetermined thickness. The intermediate holder 5 that is a rubber-like holder has a plurality of insertion holes 51 through which the cylindrical battery 1 is inserted. The intermediate holder 5 is provided with an insertion hole 51 at a position facing the holding spaces 31 and 41 provided in the first holder 3 and the second holder 4, and is provided between the cylindrical batteries 1 arranged in a bale-stacked state. Part is inserted. The inner surface of the insertion hole 51 has a columnar shape along the surface of the cylindrical battery 1, and the inner shape is slightly larger than the outer shape of the cylindrical battery 1 so that the cylindrical battery 1 can be smoothly inserted. The inner diameter is formed larger by 0.1 mm to 0.3 mm than the outer diameter of the cylindrical battery 1. Thus, in the step of inserting the plurality of cylindrical batteries 1 into the insertion holes 51, it is effectively prevented that the outer peripheral surface of the cylindrical batteries 1 becomes difficult to insert due to friction with the inner peripheral surface of the insertion holes 51. ing. However, the intermediate holder 5 in which the inner diameter of the insertion hole 51 is large enough to allow the cylindrical battery 1 to be easily inserted, the cylindrical battery 1 inserted into the insertion hole 51 is displaced inside the insertion hole 51 and is easily rotated. . In order to solve this problem, the intermediate holder 5 shown in the figure is deformed from the inner shape of the insertion hole 51 while being sandwiched between the first holder 3 and the second holder 4 from both sides, thereby forming a cylindrical shape. The structure is such that the surface of the battery 1 is pressed.

  The illustrated intermediate holder 5 is provided with a plurality of elastically deforming convex portions 6 which are elastically deformed by being pressed by the end surface 42 of the second holder 4 along the opening edge of the insertion hole 51 which is opened in a columnar shape. . The illustrated intermediate holder 5 is provided with a plurality of elastically deforming projections 6 protruding from the opening end face 52 on the opening end face 52 on one side of the insertion hole 51 and facing the second holder 4. The elastically deforming convex portion 6 shown in the figure is integrally formed of a rubber-like elastic body, and the intermediate holder 5 is opposed to the intermediate holder 5 in a state where the intermediate holder 5 is sandwiched between the first holder 3 and the second holder 4 from both sides. Is pressed against the end face 42 of the holder 4 and elastically deformed.

  The intermediate holder 5 shown in FIG. 5 has a plurality of cylindrical batteries 1 arranged in a bale-stacked state, and an insertion hole arranged at a central portion excluding an insertion hole 51 through which the cylindrical battery 1 arranged on the outer periphery is inserted. As for the hole 51, six elastically deforming convex portions 6 are arranged at equal intervals along the opening edge of the insertion hole 51. The intermediate holder 5 uniformly covers the surface of the cylindrical battery 1 arranged in the insertion hole 51 from the surrounding six directions in a state where each elastically deforming convex portion 6 is elastically deformed by being pressed by the second holder 4. By pressing the cylindrical battery 1, the cylindrical battery 1 can be held in a well-balanced and reliable manner, and the displacement of the cylindrical battery 1 can be ideally prevented, and rotation can be prevented and suppressed.

  The elastically deforming convex portion 6 is formed in a shape protruding from the opening end face 52 of the insertion hole 51 toward the opposing second holder 4. The elastic deformation convex portion 6 shown in the figure has a truncated pyramid shape in appearance, a shape having a tapered surface or a curved surface on the side surface, and a shape in which the cross-sectional area gradually decreases toward the front end, and the front end surface has a planar shape. And The elastically deforming convex portion 6 of this shape can reliably press the end face of the second holder 4 while bringing the flat end face into surface contact with the end face 42 of the opposing second holder 4 to reduce the contact pressure. . The elastic deformation projections shown in the figure have a truncated pyramid shape, but the shape of the elastic deformation projection 6 is not specified as a truncated pyramid shape. The intermediate holder 5 'shown in FIG. 7 has an elastically deforming convex portion 6' having a truncated cone shape with a tapered or curved side surface. However, the elastically deforming convex portion may have a hemispherical shape or a semi-elliptical spherical shape.

  The intermediate holder 5 described above is sandwiched in a pressed state between the first holder 3 and the second holder 4 stacked on both sides, and as shown in FIGS. The elastically deforming convex portion 6 pressed by the end face 42 of the second holder 4 elastically deforms and deforms the insertion hole 51 to press the surface of the cylindrical battery 1. That is, the elastic deformation convex portion 6 is crushed by the end face 42 of the second holder 4 and elastically deformed, thereby elastically deforming the opening edge 53 of the insertion hole 51 and deforming the inner shape of the insertion hole 51. To press the surface of the cylindrical battery 1.

  As shown in FIG. 8 (c), the elastically deforming convex portion 6 that is elastically deformed causes the opening portion 53 of the insertion hole 51 to be elastically deformed toward the cylindrical battery 1 by moving the meat portion due to the deformation. The deformed portion 53a presses the surface of the cylindrical battery 1 inserted inside the insertion hole 51. As described above, the deformed portion 53a of the insertion hole 51 that is deformed is pressed against the surface of the cylindrical battery 1, thereby preventing the cylindrical battery 1 from being displaced and preventing and suppressing rotation. This is because the frictional resistance between the inner peripheral surface of the insertion hole 51 and the cylindrical battery 1 increases. As described above, the intermediate holder 5 is elastically deformed by the elastic deformation convex portion 6 protruding from the opening end surface 52 being pressed by the end surface 42 of the second holder 4 to elastically deform the shape of the insertion hole 51, and The deformable deforming portion 53a is pressed against the surface of the cylindrical battery 1 to prevent the cylindrical battery 1 from shifting or rotating. As described above, the structure in which the elastic deformation convex portion 6 of the intermediate holder 5 formed of the rubber-like elastic body is elastically deformed and pressed against the surface of the cylindrical battery 1 is formed by the rubber-like elastic body having a large frictional resistance. The feature that the displacement of the battery 1 can be reliably prevented and the rotation can be prevented or suppressed is realized.

  Further, the elastically deforming convex portion 6 shown in FIGS. 5 and 6 has an outer shape having a protruding portion 6a protruding toward the opposed cylindrical battery 1 in plan view. FIG. 5 is a partially enlarged perspective view of the elastic deformation projection 6 provided on the intermediate holder 5. The elastically deforming convex portion 6 shown in FIG. 5 has a projection 6 a that elastically deforms while being pressed by the end face 42 of the second holder 4 and elastically deforms the opening edge 53 of the insertion hole 51. The outer shape protrudes in the direction of the battery 1.

  The protruding portion 6 a smoothly elastically deforms the opening edge 53 of the opposed cylindrical battery 1 to deform the inner shape of the insertion hole 51 in a state where the elastically deforming convex portion 6 is crushed. The shape is such that the surface of the cylindrical battery 1 protrudes toward the opposed cylindrical battery 1 so that the surface of the cylindrical battery 1 can be pressed by the deformed portion 53a that protrudes toward the cylindrical battery 1. The elastically deforming convex portion 6 shown in FIG. 6 is provided with a protrusion 6a provided on the outer periphery so that the opening edge 53 can be elastically deformed toward the opposed cylindrical battery 1 without fail. It is in a posture protruding toward. As shown in FIG. 6, the elastically deforming convex portion 6 provided with the protruding portion 6 a protruding toward the opposed cylindrical battery 1 effectively causes the opening edge 53 of the insertion hole 51 toward the surface of the cylindrical battery 1. Has the characteristic that it can be elastically deformed.

  Further, the intermediate holder 5 shown in FIGS. 5 and 6 is provided around the cylindrical battery 1 so that the opening edge 53 of the insertion hole 51 can be efficiently elastically deformed toward the plurality of opposed cylindrical batteries 1. The number and direction of the protruding portions 6a are changed according to the number of “1”. The intermediate holder 5 shown in FIGS. 5 and 6 has a first elastic deformation projection 6A having three projections 6a projecting in three directions, and a second elastic projection 6a having two projections 6a projecting in two directions. And a third elastic deformation projection 6C having one projection 6a projecting in one direction.

  The first elastically deforming convex portion 6A is located around the cylindrical battery 1 arranged at a central portion excluding the outer periphery among the plurality of cylindrical batteries 1 arranged in a bale-stacked state, and has three cylinders. It is arranged in a region surrounded by the battery 1. The first elastically deforming convex portion 6A shown in FIG. 6 has a triangular outer shape in plan view. The first elastically deforming convex portion 6A has a shape in which the top of the triangle is a protruding portion 6a and protrudes toward the cylindrical battery 1 arranged in a state facing in three directions. As shown by arrows in FIG. 6, the first elastically deforming convex portions 6A provided in the region surrounded by the three cylindrical batteries 1 are provided with three adjacent insertion holes of the intermediate holder 5 made of a rubber-like elastic body. The opening edges 53 of the holes 51 are elastically deformed in the directions of the cylindrical batteries 1 facing each other, and the surfaces of the three cylindrical batteries 1 are pressed.

  The second elastically deforming convex portion 6B is a cylindrical battery 1 arranged on the outer periphery among a plurality of cylindrical batteries 1 arranged in a bale-stacked state, and is a valley between two adjacent cylindrical batteries 1. Area. The second elastically deforming convex portion 6B shown in FIG. 6 has an outer shape having an isosceles trapezoidal shape in plan view. The 2nd elastic deformation convex part 6B is made into the shape which protrudes toward the cylindrical battery 1 arrange | positioned in the state which opposes in two directions with two apex corresponding to the acute angle of a trapezoid trapezoid as a protrusion part 6a. As shown by arrows in FIG. 6, the second elastically deforming convex portions 6B provided in the regions between the valleys of the two cylindrical batteries 1 are provided with two adjacent insertion holes 51 of the intermediate holder 5 made of a rubber-like elastic body. Are elastically deformed in the directions of the cylindrical batteries 1 facing each other to press the surfaces of the two cylindrical batteries 1.

  The third elastically deforming convex portion 6C is arranged in a region outside the cylindrical battery 1 arranged at a corner of the plurality of cylindrical batteries 1 arranged in a bale-stacked state. The third elastically deforming convex portion 6C shown in FIG. 6 has an outer shape that is a drop shape in plan view. As shown by the arrow in FIG. 6, the third elastically deformed convex portion 6B has a top portion corresponding to a drop-shaped tapered portion as a protruding portion 6a, and is formed on the cylindrical battery 1 arranged to face in one direction. It has a shape protruding toward.

  The above-described elastically deforming convex portions 6 have a truncated pyramid shape in appearance, and the number and direction of the protruding portions 6a are changed according to the number of cylindrical batteries 1 facing each other. As described above, the intermediate holder 5 specifies the number and direction of the plurality of elastically deforming convex portions 6 arranged along the periphery of the insertion hole 51 in accordance with the number of the cylindrical batteries 1 facing each other. Thereby, the surface of each cylindrical battery 1 can be effectively pressed from a plurality of locations around the cylindrical battery 1 to ideally prevent displacement of the cylindrical battery 1 and also prevent and suppress rotation.

  In the battery module 100 described above, the intermediate holder 5 is provided with the elastically deforming convex portion 6 on the opening end surface 52 facing the second holder 4, and the elastic deforming convex portion 6 is formed on the opposite end surface 42 of the second holder 4. The example which presses and elastically deforms is shown. However, in the battery module, the intermediate holder may be provided with an elastically deforming convex portion on the opening end surface on the side of the first holder, and the elastic deforming convex portion may be pressed by the end surface of the first holder to be elastically deformed. Alternatively, the battery module may be provided with elastic deformation projections on both surfaces of the intermediate holder and elastically deform the elastic deformation projections provided on both surfaces in a state where the first holder and the second holder are pressed from both surfaces. it can. As described above, the structure in which the elastically deforming convex portions are provided on both surfaces of the intermediate holder can press the cylindrical battery inserted into the insertion hole with a wider area, and can more reliably prevent the displacement and rotation of the cylindrical battery 1. There are features.

  Further, in the battery module 100 of the above-described embodiment, the holder 2 replaces the intermediate holder 5 laminated between the first holder 3 and the second holder 4 with the first holder 3 and the second holder 4. It has a structure that can be arranged in a fixed position. The holder 2 shown in FIGS. 2 to 4 is provided with a connection hole 54 in the intermediate holder 5 so that the intermediate holder 5 can be connected to a fixed position of the second holder 4. A positioning projection 44 inserted into the hole 54 is provided. The holder 2 in the figure is provided with a connection hole 54 and a positioning projection 44 at the center of two opposing sides. The positioning convex portion 44 is provided integrally with the second holder 4 as a cylindrical shape protruding from the end surface 42 of the second holder 4. As shown in FIG. 4, the positioning protrusion 44 projecting from the end face 42 of the second holder 4 is inserted into the connection hole 54 of the intermediate holder 5 so that the intermediate holder 5 Placed in place.

  Further, the holder 2 shown in FIGS. 1 to 4 holds the first holder 3 and the second holder 4 in a state where the intermediate holder 5 is held between the first holder 3 and the second holder 4 with a predetermined pressing force. The holder 4 is held in a connected state with each other, and the elastically deforming convex portion 6 of the intermediate holder 5 is held in a pressed state. In the holder 2 shown in the figure, the first holder 3 and the second holder 4 are connected to a fixed position by a locking mechanism. The first holder 3 shown in the figure is provided with a plurality of locking hooks 35 protruding toward the second holder 4 integrally formed along the outer peripheral surface. A locking hook 35 shown in the figure is extended from the side surface of the first holder 3 and has a plate-like elastic arm portion 35A intersecting with the side surface of the intermediate holder 5, and a hook portion provided at a distal end portion of the elastic arm portion 35A. 35B. The second holder 4 has a locking portion 45 for locking the hook portion 35B of the locking hook 35 on a side surface. The locking portion 45 shown in the figure is a concave portion that locks and connects the hook portion 35B. The first holder 3 and the second holder 4 are connected to each other via a locking mechanism by connecting the first holder 3 and the second holder 4 that hold the intermediate holder 5 from both sides. Can be held connected to each other at fixed positions.

  Further, the holder 2 in the figure is provided with a positioning groove 55 on the side surface of the intermediate holder 5 for guiding the elastic arm 35A of the locking hook 35 intersecting with the intermediate holder 5. The intermediate holder 5 shown in the figure has a plurality of rows of positioning grooves 55 provided in the thickness direction along the outer peripheral surface, and a plate-like elastic arm of a locking hook 35 extended from the side surface of the first holder 3. The structure is such that the portion 35A is fitted. The holder 2 can connect the intermediate holder 5 disposed on the end face 32 of the first holder 3 to a fixed position via a locking hook 35 provided along the outer peripheral surface of the first holder 3.

  Further, in the holder 2 shown in FIGS. 2 and 3, the first holder 3 and the second holder 4 laminated on both surfaces of the intermediate holder 5 are fixed at fixed positions via set screws 16. The holder 2 shown has a set screw 16 inserted into a through hole 36 provided on the outer peripheral portion of the first holder 3 and a through hole 56 provided on the outer peripheral portion of the intermediate holder. The second holder 4 is screwed into a female screw hole 46 provided on the outer peripheral portion of the second holder 4 and fixed in a state of being stacked on each other. As a result, the first holder 3 and the second holder 4 are held in a state of clamping the intermediate holder 5 with a predetermined pressing force, and the plurality of built-in cylindrical batteries 1 are kept in a fixed position for a long period of time. Can hold.

(Embodiment 2)
9 to 13 show a battery module 200 according to Embodiment 2 of the present invention. In the battery module 200, the second holder 24 and the intermediate holder 25 have a different structure from the battery module 100 of the first embodiment. Specifically, in the battery module 100 of Embodiment 1 described above, the intermediate holder 5 has the elastically deforming convex portion 6 that is elastically deformed by being pressed by the end surface 42 of the second holder 4 on the opening end surface 52 of the insertion hole 51. The end surface 42 of the second holder 4 presses the elastically deforming convex portion 6 of the intermediate holder 5 to elastically deform the opening edge 53 of the insertion hole 51 and presses the surface of the cylindrical battery 1. In the battery module 200 of the second embodiment, the second holder 24 is provided with the pressing protrusion 7 for pressing the intermediate holder 25 on the end surface 42 facing the intermediate holder 25, and the intermediate holder 25 is When pressed, the opening edge 53 of the insertion hole 51 is elastically deformed to press the surface of the cylindrical battery 1.
Hereinafter, the battery module 200 according to the second embodiment will be described in detail with reference to FIGS. 9 to 13. However, the same components as those of the battery module 100 according to the above-described first embodiment will be denoted by the same reference numerals and will be described in detail. Is omitted.

  The battery module 200 shown in FIGS. 9 to 12 stores a plurality of cylindrical batteries 1 in a holder 22 in a parallel posture. The holder 22 includes a first holder 23 having a holding space 31 for inserting one end of the cylindrical battery 1 and a second holder 24 having a holding space 41 for inserting the other end of the cylindrical battery 1. And an intermediate holder 25 laminated between the first holder 23 and the second holder 24 and holding an intermediate portion of the cylindrical battery.

(Second holder 24)
The second holder 24 has, on the opening end face of the holding space 41, the end face 42 facing the intermediate holder 25, a pressing projection 7 that locally presses the opening end face 52 of the insertion hole 51. The second holder 24 in the figure is provided with a plurality of pressing protrusions 7 for pressing the facing end surface 52 of the intermediate holder 25 along the opening edge of the holding space 41 opened in a column shape. The second holder 24 shown in FIGS. 10 and 11 is provided with a plurality of pressing projections 7 protruding from the end face 42. The pressing protrusion 7 shown in the figure is integrally formed of plastic, and the opening end face 52 of the intermediate holder 25 is held in a state where the intermediate holder 25 is sandwiched between the first holder 23 and the second holder 24 from both sides. The opening edge 53 of the insertion hole 51 is elastically deformed by being pressed locally.

  The second holder 24 shown in FIG. 10 is arranged at a central portion of the plurality of cylindrical batteries 1 arranged in a bale-stacked state, excluding a holding space 41 into which the cylindrical batteries 1 arranged on the outer periphery are inserted. As for the holding space 41, six pressing projections 7 are arranged at equal intervals along the opening edge of the holding space 41. The second holder 24 uniformly presses the surface of the cylindrical battery 1 arranged in the holding space 41 from the surrounding six directions in a state where each pressing convex portion 7 elastically deforms by pressing the intermediate holder 25. By doing so, the cylindrical battery 1 can be held in a well-balanced and reliable manner, and the displacement of the cylindrical battery 1 can be ideally prevented, and rotation can be prevented and suppressed.

  The pressing protrusion 7 is formed in a shape protruding from the end surface 42 of the holding space 41 toward the facing intermediate holder 25. The pressing projection 7 shown in the figure has a truncated pyramid shape in appearance, a shape having a tapered surface or a curved surface on the side surface, and a shape having a gradually decreasing cross-sectional area toward the tip, and a flat tip surface. I have. The pressing convex portion 7 of this shape can be reliably pushed into the inside of the intermediate holder 25 while reducing the contact pressure by bringing the flat distal end surface into surface contact with the opening end 52 of the intermediate holder 25 facing the same.

  Further, the pressing convex portion 7 shown in FIG. 12 has an outer shape having a protruding portion 7a protruding toward the opposed cylindrical battery 1 in a plan view. FIG. 12 is an enlarged bottom view of the pressing protrusion 7 provided on the end surface 42 of the second holder 24. The pressing convex portion 7 shown in FIG. 12 is a protrusion that presses the opening end surface 52 of the intermediate holder 25 locally while being pressed by the end surface 42 of the second holder 24 to elastically deform the opening edge of the insertion hole 51. The portion 7a has an outer shape protruding in the direction of the cylindrical battery 1 facing the same.

  The projecting portion 7 a deforms the inner shape of the insertion hole 51 by smoothly elastically deforming the opening edge 53 of the opposed cylindrical battery 1 in a state where the pressing projection 7 is pushed into the opening end surface 52 of the intermediate holder 25. The shape is such that the surface of the cylindrical battery 1 protrudes toward the opposing cylindrical battery 1 so that the surface of the cylindrical battery 1 can be pressed by the deformed portion 53a protruding toward the cylindrical battery 1. The pressing projection 7 shown in FIG. 12 has a projection 7 a provided on the outer periphery at the center of the opposed cylindrical battery 1 so that the opening edge 53 can be elastically deformed toward the opposed cylindrical battery 1. It is in a posture protruding toward. As shown in FIG. 12, the pressing convex portion 7 including the protruding portion 7 a protruding toward the opposed cylindrical battery 1 effectively causes the opening edge 53 of the insertion hole 51 to face the surface of the cylindrical battery 1. It has the feature that it can be elastically deformed.

  Further, the second holder 24 shown in FIG. 12 is provided around the cylindrical battery 1 so that the opening edge 53 of the insertion hole 51 can be efficiently elastically deformed toward the plurality of cylindrical batteries 1 facing each other. The number and direction of the protruding portions 7a are changed according to the number. The second holder 24 shown in FIG. 12 has a first pressing projection 7A having three projections 7a projecting in three directions, and a second pressing having two projections 7a projecting in two directions. It has a projection 7B and a third pressing projection 7C having one projection 7a projecting in one direction.

  The first pressing protrusion 7A is located around the cylindrical battery 1 arranged at the central portion excluding the outer periphery of the plurality of cylindrical batteries 1 arranged in a bale-stacked state, and has three cylindrical batteries. It is arranged in a region surrounded by the battery 1. The first pressing projection 7A shown in FIG. 12 has an outer shape that is triangular in plan view. The first pressing protrusion 7A has a shape in which the top of the triangle is a protrusion 7a and protrudes toward the cylindrical battery 1 arranged in a state facing the three directions. As shown in FIG. 13C, the first pressing protrusion 7A provided in the region surrounded by the three cylindrical batteries 1 is pressed into the opening end face 52 of the intermediate holder 25 made of a rubber-like elastic body. Then, the opening edges 53 of the three adjacent insertion holes 51 are elastically deformed in the directions of the opposed cylindrical batteries 1 respectively, and the surfaces of the three cylindrical batteries 1 are pressed.

  The second pressing convex portion 7B is a cylindrical battery 1 arranged on the outer periphery among a plurality of cylindrical batteries 1 arranged in a bale stack state, and is a valley between two adjacent cylindrical batteries 1. Located in the area. The second pressing convex portion 7B shown in FIG. 12 has an outer shape having an isosceles trapezoidal shape in plan view. The second pressing convex portion 7B has a shape in which two apexes corresponding to acute angles of an equilateral trapezoid are formed as protruding portions 7a and protrude toward the cylindrical battery 1 arranged in a state of facing in two directions. The second pressing protrusion 7B provided in the region between the valleys of the two cylindrical batteries 1 has a cylindrical shape that faces the opening edges 53 of two adjacent insertion holes 51 of the intermediate holder 25 made of a rubber-like elastic body. The surfaces of the two cylindrical batteries 1 are pressed by being elastically deformed in the direction of the batteries 1.

  The third pressing protrusion 7C is arranged in a region outside the cylindrical battery 1 arranged at a corner of the plurality of cylindrical batteries 1 arranged in a bale-stacked state. The third pressing projection 7C shown in FIG. 12 has an outer shape that is a drop shape in plan view. The third pressing convex portion 7B has a shape corresponding to a top portion corresponding to a drop-shaped tapered portion as a protruding portion 7a, and has a shape protruding toward the cylindrical battery 1 arranged to face in one direction.

  The above-mentioned pressing convex part 7 has a truncated pyramid shape in appearance, and changes the number and direction of the protruding parts 7 a according to the number of the cylindrical batteries 1 facing each other. As described above, the second holder 24 determines the number and the direction of the plurality of pressing protrusions 7 arranged along the periphery of the holding space 41 according to the number of the cylindrical batteries 1 facing each other. By doing so, the surface of each cylindrical battery 1 can be effectively pressed from a plurality of surrounding locations to ideally prevent displacement of the cylindrical battery 1 and prevent / suppress rotation. The pressing projection 7 shown in the figure has a truncated pyramid shape, but the pressing projection 7 does not specify its shape as a truncated pyramid. Although not shown, the pressing convex portion 7 can be formed into various shapes capable of pressing the opening end surface of the intermediate holder in a directional manner.

(Intermediate holder 25)
As shown in FIGS. 9 and 10, the intermediate holder 25 is a rubber-like holder formed by molding a rubber-like elastic body into a plate having a predetermined thickness. The intermediate holder 25, which is a rubber-like holder, has a plurality of insertion holes 51 through which the cylindrical battery 1 is inserted. Further, in the illustrated intermediate holder 25, an open end face facing the end faces of the first holder 23 and the second holder 24 has a planar shape. As shown in FIG. 13, the intermediate holder 25 is pushed into the opening end face while the flat opening end face 52 is locally pressed by the pressing protrusion 7 provided on the second holder 24, and is inserted. The opening edge of the hole is elastically deformed to press the surface of the cylindrical battery 1.

  The intermediate holder 25 described above is sandwiched in a pressed state between the first holder 23 and the second holder 24 laminated on both sides, as shown in FIGS. The opening end face 52 of the intermediate holder 25 is locally pressed by the pressing projection 7 of the second holder 24, and the insertion hole 51 is deformed to press the surface of the cylindrical battery 1. That is, when the pressing projection 7 is pushed into the opening end face 52 of the intermediate holder 25, the opening edge 53 of the insertion hole 51 is elastically deformed, and the inner shape of the insertion hole 51 is deformed, so that the surface of the cylindrical battery 1 is deformed. Press.

  As shown in FIG. 8 (c), the elastically deformed intermediate holder 25 causes the opening portion 53 of the insertion hole 51 to elastically deform toward the cylindrical battery 1 as a result of the movement of the meat portion due to the deformation. 53 a presses the surface of the cylindrical battery 1 inserted through the insertion hole 51. As described above, the deformed portion 53a of the insertion hole 51 that is deformed is pressed against the surface of the cylindrical battery 1, thereby preventing the cylindrical battery 1 from being displaced and preventing and suppressing rotation. As described above, the structure in which the intermediate holder 25 formed of the rubber-like elastic body is elastically deformed by the pressing convex portion 7 and pressed against the surface of the cylindrical battery 1 is constituted by the rubber-like elastic body having a large frictional resistance. This realizes a feature that the displacement of the first position can be reliably prevented, and the rotation can be prevented or suppressed.

  In the battery module 200 described above, the second holder 24 is provided with the pressing convex portion 7 on the end surface 42 facing the intermediate holder 25, and the pressing convex portion 7 locally presses the opening end surface 52 facing the intermediate holder 25. In this case, the elastic deformation is performed. However, in the battery module, the first holder may be provided with a pressing protrusion on the end surface, and the pressing protrusion of the first holder may press the opening end surface of the intermediate holder on the first holder side to be elastically deformed. . Alternatively, in the battery module, pressing projections are provided on both end surfaces of the first holder and the second holder, and both surfaces of the intermediate holder are locally pressed by pressing the first holder and the second holder from both surfaces. It can also be elastically deformed by pressing it. As described above, the structure in which both surfaces of the intermediate holder are elastically deformed by the pressing protrusions presses the cylindrical battery inserted through the insertion hole with a wider area, thereby more reliably preventing the displacement and rotation of the cylindrical battery 1. it can.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used as a battery module in which a cylindrical battery is arranged at a fixed position by a holder, and particularly, a battery module capable of preventing displacement and rotation of the cylindrical battery.

100, 200 ... Battery module 1 ... Cylindrical battery 2, 22 ... Holder 3, 23 ... First holder 4, 24 ... Second holder 5, 5 ', 25 ... Intermediate holder 6, 6' ... Elastic deformation convex part 6A 1st elastic deformation convex part 6B 2nd elastic deformable convex part 6C 3rd elastic deformable convex part 6a ... protruding part 7 ... pressing convex part 7A ... first pressing convex part 7B ... second pressing Projecting portion 7C Third pressing projecting portion 7a Projecting portion 11 Bus bar 12 Lead wire 16 Set screw 31 Holding space 32 End face 33 Electrode window 35 Locking hook 35A Elastic arm portion 35B Hook portion 36 ... through hole 41 ... holding space 42 ... end face 43 ... electrode window 44 ... positioning convex part 45 ... locking part 46 ... female screw hole 51 ... insertion hole 52 ... opening end face 53 ... opening edge 53a ... deformation part 54 ... connection Hole 55: Positioning groove 56: Through hole

Claims (12)

A plurality of cylindrical batteries,
A battery module comprising: a holder in which each cylindrical battery is arranged in a parallel posture;
The holder is
A first holder having a holding space into which one end of the cylindrical battery is inserted;
A second holder having a holding space for inserting the other end of the cylindrical battery;
An intermediate holder stacked between the first holder and the second holder to hold an intermediate portion of the cylindrical battery;
The intermediate holder is a rubber-like holder formed by molding a rubber-like elastic body, and has a plurality of insertion holes through which the cylindrical battery is inserted. An elastic deformation convex portion pressed by an end face of the first holder or the second holder;
With the first holder and the second holder sandwiching the intermediate holder from both sides, the insertion hole is elastically deformed through the elastically deforming convex portion which elastically deforms the surface of the cylindrical battery. A battery module to be pressed.   2. The battery module according to claim 1, wherein the elastic deformation convex portion has any one of a truncated pyramid shape, a truncated cone shape, a hemispherical shape, and a semi-elliptical spherical shape. 3.   3. The battery module according to claim 1, wherein the intermediate holder is provided with a plurality of the elastic deformation protrusions at regular intervals along an opening edge of the insertion hole. 4.   4. The battery module according to claim 1, wherein the elastically deforming convex portion has an outer shape having a protruding portion that protrudes toward the opposed cylindrical battery in plan view. 5. The holder disposes a plurality of cylindrical batteries in a bale-stacked state, and inserts the holding space and the insertion space in an arrangement where the cylindrical batteries in an adjacent row are arranged between valleys of the cylindrical batteries arranged in the same row. With a hole,
The intermediate holder is provided with the elastically deforming convex portion having a triangular shape in a plan view in a region surrounded by three cylindrical batteries arranged in adjacent rows,
The elastically deforming convex portion elastically deforms an inner shape of the insertion hole toward the opposed cylindrical battery as the projecting portion that projects a triangular apex toward the opposed cylindrical battery. The battery module according to claim 4. A plurality of cylindrical batteries,
A battery module comprising: a holder in which each cylindrical battery is arranged in a parallel posture;
The holder is
A first holder having a holding space into which one end of the cylindrical battery is inserted;
A second holder having a holding space for inserting the other end of the cylindrical battery;
An intermediate holder stacked between the first holder and the second holder to hold an intermediate portion of the cylindrical battery;
The intermediate holder is a rubber-like holder formed by molding a rubber-like elastic body, and has a plurality of insertion holes through which the cylindrical battery is inserted,
Either or both of the first holder and the second holder are provided with a pressing protrusion for locally pressing the opening end surface of the insertion hole on an end surface facing the intermediate holder,
The pressing projection has an outer shape having a projection projecting toward the opposed cylindrical battery in plan view,
In a state in which the first holder and the second holder sandwich the intermediate holder from both sides, the pressing convex portion presses the intermediate holder, elastically deforms the insertion hole, and causes the cylindrical battery to be deformed. A battery module configured to press the surface.   The battery module according to claim 6, wherein the first holder or the second holder is provided with a plurality of the pressing protrusions at equal intervals along an opening edge of the holding space. The holder disposes a plurality of cylindrical batteries in a bale-stacked state, and inserts the holding space and the insertion space in an arrangement where the cylindrical batteries in an adjacent row are arranged between valleys of the cylindrical batteries arranged in the same row. With a hole,
Either or both of the first holder and the second holder are provided with the pressing protrusion having a triangular shape in a plan view in a region surrounded by three cylindrical batteries arranged in adjacent rows. Has been established,
9. The battery module according to claim 7, wherein the pressing projection elastically deforms an inner shape of the insertion hole toward the opposed cylindrical battery, using a triangular top as the projection. 10. The inner surface of the holding space and the insertion hole has a cylindrical shape along the surface of the cylindrical battery,
The battery module according to any one of claims 1 to 8, wherein an opening edge of the insertion hole is elastically deformed and pressed against a surface of the cylindrical battery. The first holder or the second holder includes a positioning protrusion that connects the intermediate holder to a fixed position,
The intermediate holder includes a connection hole for guiding the positioning projection,
The said positioning convex part is inserted in the said connection hole, The said 1st holder or the said 2nd holder provided with the positioning convex part, and the said intermediate holder are connected at a fixed position. 10. The battery module according to any one of 1 to 9. The first holder and the second holder are connected to each other via a locking mechanism,
The locking mechanism,
A locking hook extending from one side of the first holder and the second holder toward the other side of the first holder and the second holder;
A locking portion provided on one of the other side surfaces of the first holder and the second holder, wherein the locking hook is locked.
11. The device according to claim 1, wherein the locking hook is locked to the locking portion, and the first holder and the second holder hold the intermediate holder in a fixed position. Battery module. The locking hook includes an elastic arm portion extending from one of the side surfaces of the first holder and the second holder, and a hook portion provided at a distal end portion of the elastic arm portion,
The elastic arm portion is arranged in a posture intersecting with a side surface of the intermediate holder,
The battery module according to claim 11, wherein the intermediate holder has a positioning groove formed on a side surface for guiding the elastic arm.

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