JP6016030B2 - Power storage module - Google Patents

Description

  The present invention relates to a power storage module.

  Conventionally, a power storage module configured by stacking a plurality of flat storage devices is known.

  In Patent Document 1, secondary batteries having a thickness that is thin in the vertical direction with respect to the width dimension in the horizontal direction are stacked vertically, and the tabs of the stacked secondary batteries are welded to the bus bar of the side holder. Thus, a plurality of secondary batteries are connected.

JP2013-12458A

  By the way, in Patent Document 1, the plurality of power storage elements are stacked in the vertical direction, which is the thickness direction in which the dimensions are small, but unlike this, it is also possible to arrange the plurality of power storage elements side by side in the width direction in which the dimensions are large. It is done.

  Here, when the power storage elements are arranged side by side, the degree of freedom of movement of the power storage elements is likely to increase compared to the case where the power storage elements are stacked one above the other. If the power storage element is displaced, there is a concern that the power storage element may be rattled or stress may be generated at the connection portion of the terminals of each power storage element, resulting in poor connection.

  The present invention has been completed based on the above-described circumstances, and an object thereof is to prevent the displacement of a storage element.

The power storage module of the present invention includes a plurality of flat storage elements, a heat dissipation member in which a flat surface of each storage element is placed in a predetermined region different for each storage element, and each storage element A holding member that holds the heat dissipation member in the predetermined region, and a plurality of power storage units in which the plurality of power storage elements placed on the heat dissipation member are held by the holding member are stacked, The holding member includes a restricting piece that protrudes toward the adjacent power storage unit and restricts the displacement of the power storage element in the adjacent power storage unit.

For each power storage element, if the flat surface of the power storage element is placed in a different region of the heat dissipation member, the heat of the power storage element can be dissipated through the heat dissipation member. Then, since the degree of freedom of movement of the power storage element is likely to be greater than in the case where the power storage elements are stacked, there is a concern that the power storage element may be displaced. According to this configuration, even if the configuration is such that the displacement of the storage element is likely to occur, the storage element can be held in a predetermined region by the holding member, so that the displacement of the storage element can be prevented. become.
Moreover, the positional deviation of the electrical storage element of an adjacent electrical storage unit can be prevented by the restriction piece of the holding member.

It is preferable to have the following configuration as an embodiment of the above configuration.
The holding member includes a holding wall in which the power storage element is fitted and held inside, and the heat dissipation member of the adjacent power storage unit is stacked on the power storage element in the power storage unit.
-The base end part of the said control piece is formed in the said holding wall.
If it does in this way, the electrical storage element of an adjacent electrical storage unit can be hold | maintained using the holding wall for hold | maintaining an electrical storage element.
The holding member includes a positioning portion that positions the heat radiating member in a direction along the flat surface.
In this case, the holding member can be positioned in the direction along the flat surface with respect to the heat radiating member by the positioning portion. Therefore, the storage element held by the holding member also in the direction along the flat surface with respect to the heat radiating member It becomes possible to position to.

The holding member includes a locking piece that is locked to the heat radiating member and restricts movement of the heat radiating member in the separation direction.
In this way, since the movement of the radiating member in the detaching direction is restricted by the retaining piece of the holding member, the power storage element held by the holding member can be positioned with respect to the radiating member in the detaching direction of the radiating member. It becomes possible.

A bus bar connected to each of the positive electrode terminal and the negative electrode terminal of the power storage element is provided, and the holding member holds the bus bar.
In this way, the power storage element and the bus bar can be integrally held by the holding member, so that it is possible to further prevent stress from being generated at the connection portion between the terminal of the power storage element and the bus bar.

  According to the present invention, it is possible to prevent displacement of the storage element.

The perspective view which shows the electrical storage module of Embodiment 1. Perspective view showing the laminate Plan view showing a laminate AA sectional view of FIG. The perspective view which shows the state by which the lower side 2 layer electrical storage unit was laminated | stacked Perspective view showing the lowermost power storage unit Top view showing a state in which the lead cover is removed from the lowermost power storage unit The perspective view which shows the state by which the side separator and the holding member were assembled | attached to the heat radiating member. Bottom view showing a state in which the side separator and the holding member are assembled to the heat dissipation member The perspective view which shows an electrical storage element A perspective view showing the first bus bar A perspective view showing the second bus bar A perspective view showing a heat dissipation member Top view showing heat dissipation member Right side view showing heat dissipation member The perspective view which shows a holding member The perspective view which shows a holding member from the direction different from FIG. Plan view showing holding member Rear view showing the holding member Right side view showing the holding member Perspective view showing the lead cover Bottom view showing the lead cover A perspective view showing the first side separator The perspective view which shows a 1st side separator from the direction different from FIG. Plan view showing the first side separator Front view showing the first side separator Side view showing the first side separator A perspective view showing the second side separator The perspective view which shows a 2nd side separator from the direction different from FIG. Plan view showing the second side separator Front view showing the second side separator Left side view showing the second side separator The perspective view which shows the state by which the 1st and 2nd side separator was assembled | attached to the heat radiating member. The perspective view which shows the state by which the 1st and 2nd side separator was assembled | attached to the heat radiating member from the direction different from FIG. The top view which shows the state by which the 1st and 2nd side separator was assembled | attached to the thermal radiation member.

<Embodiment 1>
The first embodiment will be described with reference to FIGS.
The power storage module 10 according to the present embodiment is used for an integrated starter generator (ISG) of a vehicle such as an automobile. In the following description, the lower part of FIG. 7 is assumed to be the front, the upper part is assumed to be the rear, the right and left direction is described with reference to the direction of FIG.

(Power storage module 10)
As illustrated in FIG. 1, the power storage module 10 includes a stacked body 20 in which a plurality of (six layers in the embodiment) power storage units 21 </ b> A to 21 </ b> F are stacked in a substantially rectangular parallelepiped case 11. Terminals 24A and 25A penetrate the case 11 and are led out.
(Case 11)
The case 11 includes a cylindrical case main body 12 that surrounds the stacked body 20, and a closing member 17 that closes left and right openings of the case main body 12.
The case body 12 is made of metal, and includes a box-shaped lower case 13A in which the stacked body 20 is accommodated, and an upper case 13B that covers the lower case 13A.

The lower case 13A is open at the top and front and partly open at the rear.
A fastening hole (not shown) for penetrating and fastening the bolt 15A through which the laminated body 20 is penetrated is formed through the peripheral edge of the bottom surface of the lower case 13A.
The upper case 13B has a substantially rectangular shape, and a heat radiating surface 14 that is recessed inside the case 11 is formed at the center thereof. The power storage element in the power storage unit 21F in the uppermost layer is the inner surface of the heat radiating surface 14. The heat of the electricity storage element 22 is dissipated to the outside through the heat radiating surface 14 by contacting with 22.

A retaining hole for fastening with a bolt 15A and a nut 15B is formed through the peripheral edge of the upper case 13B.
A locking hole 16 for locking the closing member 17 is formed at the left end of the upper case 13B.
The closing member 17 is made of synthetic resin and has a shape that fits into the left and right openings of the case 11. The left side closing member 17 (the right closing member 17 is not shown) has a terminal 24 </ b> A. , 25A is led through to the outside of the case 11 so as to penetrate therethrough. On the upper surface of the blocking member 17, a locking projection that is locked to the hole edge of the locking hole 16 and holds the closed state of the blocking member 17 is fitted into the locking hole 16.

(Laminated body 20)
As illustrated in FIG. 2, the stacked body 20 is configured by stacking a plurality of (in this embodiment, six layers) power storage units 21 </ b> A to 21 </ b> F vertically.
The direction of each power storage unit 21A to 21F is alternately changed so that the front and rear directions of the adjacent power storage units 21A to 21F are opposite, and the six layers of power storage units 21A to 21F are connected in series. .
Since each of the power storage units 21A to 21F constitutes a parallel circuit and has a similar configuration, the following description will mainly focus on the lowermost power storage unit 21A and description of the other power storage units 21B to 21F. Omitted.

(Power storage unit 21A)
As shown in FIG. 7, each power storage unit 21 </ b> A is connected to a plurality (three in this embodiment) of power storage elements 22 having positive and negative terminals 23 </ b> A and 23 </ b> B, and terminals 23 </ b> A and 23 </ b> B of each power storage element 22. Bus bars 24 and 25, and each storage element 22 mounted thereon, a heat radiating member 28 that dissipates heat of the power storage element 22 to the outside, and a synthetic resin that holds each power storage element 22 in different predetermined areas on the heat dissipation member 28 A holding member 32 made of metal, and side separators 56 and 57 disposed on the left and right sides of the heat radiating member 28 and the holding member 32 and holding the bus bars 24 and 25, respectively.

(Storage element 22)
The plurality of power storage elements 22 have the same configuration, and are flat-type laminated batteries as shown in FIG.
Each power storage element 22 has power storage elements (not shown) accommodated in the upper and lower laminate films and welded at the ends, and positive and negative terminals 23A and 23B (lead terminals) are outward from the end of the laminate film. It protrudes.

  The laminate film has a resin layer laminated on the outside of the metal foil. Examples of the metal foil include aluminum foil, and examples of the resin layer include polyethylene terephthalate and nylon. A heat welding layer made of polyethylene, polypropylene, or the like is provided inside the metal foil (on the electricity storage element side).

The welded side end of the laminate film is bent inward.
The pair of terminals 23A and 23B are led out from between the upper and lower laminate films so as to overlap the upper surface of the lower laminate film.
The plurality of power storage elements 22 are arranged in a line on the heat dissipation member 28 (in a direction along the upper and lower flat surfaces of the power storage elements 22).

(Bus bar 24, 25)
As shown in FIG. 7, the bus bars 24 and 25 have a first bus bar 24 extending to the left side (one side in the arrangement direction of the storage elements 22) and a right side (the other side in the arrangement direction of the storage elements 22). The second bus bar 25 extends.
As shown in FIGS. 11 and 12, the bus bars 24 and 25 have a plurality (three places) of tab portions 26 </ b> A connected to the terminals 23 </ b> A and 23 </ b> B of the power storage element 22 in the extending direction of the bus bars 24 and 25. It protrudes in the direction orthogonal to the edge.

The bus bars 24 and 25 are bent at a bent portion 26B so that the side where the tab portions 26A are continuous is lowered, and the first bus bar 24 and the second bus bar 25 are overlapped on the lower portion. An insulating material (not shown) is superimposed on the bus bars 24 and 25 at the portions where the bus bars 24 and 25 overlap.
The bus bars 24 and 25 are formed with a voltage detector 26 </ b> C to which an electric wire (not shown) for detecting the voltage of the storage element 22 is electrically connected.
The bus bars 24 and 25 are formed by punching a metal plate material and bending it, and are made of a conductive material such as pure aluminum, aluminum alloy, copper, or copper alloy, for example.

Regarding the lowermost power storage unit 21A, the left end portion of the first bus bar 24 is used as a positive terminal 24A of the entire power storage module 10, and is connected to a terminal (not shown) of an external electric wire terminal.
In addition, about the electrical storage units 21B-21F, the 1st bus bar 24 is connected with the 2nd bus bar 25 of electrical storage units 21A-21D adjacent up and down, and the connection of the 1st bus bar 24 and the 2nd bus bar 25 at this time is A connection terminal 27 formed by bending a thin metal plate (copper plate or the like) into a crank shape is ultrasonically welded to the first bus bar 24 and the second bus bar 25 (see FIG. 5), so that the adjacent power storage units 21A to 21F The bus bars 24 and 25 are electrically connected.

The second bus bar 25 of the uppermost power storage unit 21F serves as the negative terminal 25A of the entire power storage module 10 and is connected to a terminal (not shown) of an external electric wire terminal.
About each electrical storage unit 21A-21F, the 1st bus bar 24, the several electrical storage element 22, and the 2nd bus bar 25 are connected, and the parallel circuit where the several electrical storage elements 22 were connected in parallel is comprised.

(Heat dissipation member 28)
As shown in FIG. 13, the heat dissipation member 28 has a rectangular shape, and has a flat raised surface portion 28 </ b> A in which a region including a portion on which the power storage element 22 is placed is higher than the front end portion and the rear end portion.
Both side edges of the raised surface portion 28A are slightly bent downward.
On the front side of the raised surface portion 28A, rectangular connection holes 29 for ultrasonically connecting the terminals 23A and 23B and the tab portion 26A are provided side by side.
A plurality (four in this embodiment) of circular positioning holes 31 for positioning the holding member 32 are formed through the end of the heat radiating member 28 in the width direction.

Further, between the positioning holes 31 on the rear side, a plurality of (three in this embodiment) through-holes 30 that are long in the left-right direction are provided side by side.
The through hole 30 is a groove-like through hole, and a regulating piece 35 of a holding member 32 described later is inserted therethrough.

A plurality (four in this embodiment) of connecting and connecting pieces 46 for connecting the side separators 56 and 57 project laterally from the side edge of the heat radiating member 28.
The connection connecting piece 46 is provided on both side edges of the front end portion and the rear end portion of the heat dissipation member 28. The front connection connecting piece 46 protrudes laterally flush with the plate surface of the heat radiating member 28, and the rear connection connecting piece 46 formed on the raised surface portion 28 </ b> A is bent at the base end in a step shape. And extend to the same height as the connecting connecting piece 46 on the front side.
Each connection connecting piece 46 is formed with a rectangular through hole 46A that is long in the front-rear direction.

A plurality of heat transfer portions 28 </ b> B that are in contact with the case 11 and transmit heat to the case 11 are set up at the front and rear edges of the heat radiating member 28 with a space left and right.
The heat dissipation member 28 can be formed, for example, by punching and bending a metal plate material, which is a heat conductive material made of aluminum or aluminum alloy, using a press machine.

(Holding member 32)
The holding member 32 is made of an insulating synthetic resin, and as shown in FIGS. 7 and 8, is disposed on the heat radiating member 28 to hold the power storage element 22 and the bus bars 24, 25. It is formed in a size that can be placed on the upper surface of the member 28.
As shown in FIGS. 16 and 17, the holding member 32 includes a power storage element holding portion 33 that holds the power storage element 22 in different predetermined regions of the heat dissipation member 28, and a bus bar holding portion 41 that holds the bus bars 24 and 25. In addition, the storage element holding part 33 and the bus bar holding part 41 are integrally provided with a connection part 47 connected to the terminals 23A and 23B of the storage element 22 and the bus bars 24 and 25. In the present embodiment, the same shape is used for the holding members 32 of the six layers of the power storage units 21A to 21F.

The power storage element holding portion 33 is provided with a rectangular frame-shaped holding wall 34 having three openings 33 </ b> A large enough to fit a plurality (three in this embodiment) of power storage elements 22 side by side. .
The holding wall 34 is formed to be thick in the vertical direction and partitions the adjacent power storage elements 22.

The front wall of the holding wall 34 is so low that the terminals 23 </ b> A and 23 </ b> B of the electricity storage element 22 pass through it.
On the rear wall of the holding wall 34, a regulation piece 35 that regulates the positional deviation of the power storage elements 22 arranged in the lower power storage units 21A to 21E is formed to protrude downward.
The restriction piece 35 extends downward with the holding wall 34 as a base end by providing a notch 36 in which the lower end side of the holding wall 34 is cut out in a slit shape.
The restricting piece 35 is formed with a thickness that allows the front end side to be elastically deformed in the front-rear direction. As shown in FIG. 4, the front end portion has a protruding portion 35 </ b> A protruding in a step shape on the front side. Yes.
The protruding portion 35A has an inclined surface that decreases the protruding dimension in an inclined manner toward the distal end side.
The length of the restricting piece 35 is set such that the front end thereof does not exceed the bottom surfaces of the front end portion and the rear end portion, which are lower than the raised surface portion 28 </ b> A of the heat radiating member 28.

When the holding member 32 is attached to the heat radiating member 28, the inclined surface of the projection 35 </ b> A contacts the edge of the through hole 30 of the heat radiating member 28, so that the regulating piece 35 is bent and deformed, and the projection 35 </ b> A is inserted into the through hole. After 30, the restricting piece 35 is restored and deformed.
Then, when the power storage units 21A to 21F are alternately stacked and stacked, the leading end portion of the regulation piece 35 in each of the power storage units 21B to 21F contacts the front end of the power storage element 22 in the lower power storage units 21A to 21E. It is arranged at a position that is close to or slightly spaced. Thereby, about the electrical storage element 22 of electrical storage unit 21B-21F, the position shift to the front side is controlled.

As shown in FIGS. 16 and 17, the front end portion of the power storage element holding portion 33 (the front end portion of the holding member 32) has a position fixing portion 37 whose position is fixed with respect to the side separators 56 and 57 and the heat radiating member 28. Has been.
The position fixing portion 37 extends in a band shape on the left and right sides of the holding wall 34, and the thickness in the vertical direction is formed to be thinner than the thickness of the holding wall 34.

Side fixing portions 38 project in a rectangular shape on the left and right at the end in the width direction of the position fixing portion 37.
The side fixing portion 38 is formed with a circular positioning hole 38A.
On the back surface of the position fixing portion 37, a plurality of concave portions 39 are formed from the back surface side, and a positioning portion 40 is formed inside the side fixing portion 38.

The positioning portion 40 protrudes downward in a circular shape, and the periphery of the tip is rounded. The positioning portion 40 is also formed at the front end portion on the left and right end portions of the back surface of the bus bar holding portion 41.
The positioning part 40 is formed at a position relatively close to the position where the power storage element 22 is held on the back surface of the holding member 32.

The bus bar holding portion 41 has a plate shape extending left and right, and a rear end portion (rear end portion of the holding member 32) is formed with an upright wall 42 raised upward in an L shape.
A locking piece 43 that locks to the heat radiating member 28 is formed on the standing wall 42 so as to protrude downward.
The locking piece 43 extends downward with the upright wall 42 as a base end by providing a notch 44 in which the lower end side of the upright wall 42 is cut out in a slit shape.
The locking piece 43 is formed with a protrusion 43A protruding in a step shape on the front side at the tip (see FIG. 4). The projecting portion 43A has an inclined surface that reduces the projecting dimension in an inclined manner toward the tip side.

On the front side of the bus bar holding portion 41, a bus bar holding piece 45 stands upward.
The bus bar holding piece 45 has a shape in which a tip portion projects rearward in a step shape and a tip side thereof tapers in an inclined shape.
The bus bars 24 and 25 are held by the bus bar holding portion 41 together with the insulating material overlapped with the bus bar 25 at the step portion of the bus bar holding piece 45.

The connection portion 47 is provided with rectangular connection holes 48 arranged side by side to connect the terminals 23A and 23B and the tab portion 26A.
A partition wall 49 is erected between the adjacent connection holes 48.

A plurality of partition walls 49 near the left and right sides are formed with claw portions 50 that hold and hold the tab portions 26A of the bus bars 24, 25.
Side fixing portions 51 for fixing to the side separators 56 and 57 together with the side fixing portion 38 project in the left and right direction at the left and right ends of the connecting portion 47.
The side fixing portion 51 has a circular positioning hole 51A formed therethrough.
A long lead cover 52 is placed on the connecting portion 47 so as to cover the terminals 23A and 23B.

As shown in FIG. 22, the lead cover 52 is formed with six convex portions 53 arranged in the left and right sides on the bottom surface thereof.
On the bottom surface of the lead cover 52, a plurality of cover locking portions 54 that are locked to the holding member 32 and hold the lead cover 52 in a closed state are formed.
The claw-like tip of the cover locking portion 54 is locked to the hole edge of the locking hole 49A of the partition wall 49 (see FIG. 16).

(Side separators 56, 57)
The side separators 56 and 57 are made of insulating synthetic resin, and are connected to the left and right of the heat radiating member 28 as shown in FIGS. 33 to 35, and to the left of the heat radiating member 28 (one in the left and right direction). A first side separator 56 that is continuous and holds the first bus bar 24, and a second side separator 57 that is connected to the right side (the other in the left-right direction) of the heat dissipation member 28 and holds the second bus bar 25. Regarding the six layers of power storage units 21A to 21F, the side separators 56 and 57 have the same functions but slightly different shapes depending on the layers. Hereinafter, the side separators 56 and 57 of the lowermost power storage unit 21A will be described, and description of the side separators 56 and 57 of the other power storage units 21B to 21F will be omitted.

As shown in FIGS. 23 and 28, the side separators 56 and 57 both have a bus bar mounting portion 58 on which the bus bars 24 and 25 are mounted.
A peripheral wall 59 into which the bus bars 24 and 25 are fitted protrudes from the periphery of the bus bar mounting portion 58, and a bus bar locking portion 60 that locks the bus bars 24 and 25 so as not to be detached from the bus bar mounting portion 58. .

  The bus bar engaging portion 60 is an elastically deformable U-shaped bending piece, and has a claw portion protruding in a step shape on the front end portion on the bus bar 24, 25 side, and the claw portion is tapered on the front end side. Have an inclined surface. When the bus bars 24 and 25 are placed on the bus bar placing portion 58, the bus bar engaging portion 60 abuts against the bus bars 24 and 25 and elastically deforms, and when the bus bars 24 and 25 are placed, the bus bars 24 and 25 are restored and deformed. Thus, the bus bars 24 and 25 are locked so as not to be detached from the bus bar mounting portion 58.

At the front and rear ends of the side separator 57, an interlayer connection piece 66 that is engaged with the connection recess 65 (see FIG. 2) of the side separator 56 in the power storage units 21 </ b> B to 21 </ b> F of the adjacent layers on the upper side protrudes upward. . The interlayer connection piece 66 has a claw portion protruding in a step shape at a tip portion thereof, and the claw portion has an inclined surface whose tip side is inclined in a tapered shape.
The interlayer connection piece 66 is also provided in the first holding member 56 of the power storage units 21B to 21E, and the power storage units 21B to 21E have a first holding in the power storage units 21A to 21E in the next lower layer. An interlayer connection piece 66 that is engaged with the connection recess 65 of the member 56 is provided.

Positioning convex portions 61 that are fitted into the positioning holes 51A of the side fixing portions 51 and fix the holding members 56, 57 and the connecting member 32 in a connected state at the end portions of the side separators 56, 57 on the heat radiating member 28 side. Protrudes upward in a cylindrical shape.
The positioning convex portions 61 are provided at two locations on the side of the heat radiating member 28 for each of the side separators 56 and 57, and one of the protruding portions 61 protrudes from the edge of each of the side separators 56 and 57 to the side of the heat radiating member 28. The other is formed inside the end edges of the side separators 56 and 57.
At the end of each side separator 56, 57 on the side of the heat radiating member 28, there is provided a connection receiving portion 62 into which the heat radiating member 28 is fitted to hold the heat radiating member 28 and the side separators 56, 57 in a connected state.

The connection receiving portions 62 are provided on the front end side and the rear end side of the end portions of the side separators 56 and 57 on the heat radiating member 28 side, and the connection connecting pieces 46 are inserted as shown in FIGS. The insertion recess 62 </ b> A is connected to the connecting connection piece 46.
The connection locking piece 62B can be bent and deformed in the vertical direction, and a locking protrusion 63 protruding downward is formed at the tip.

The locking projection 63 protrudes downward in a step shape, and has an inclined surface that decreases the protruding dimension in an inclined manner toward the distal end side of the coupling locking piece 62B.
When the coupling locking piece 62B is inserted into the insertion recess 62A, only the movement of the coupling connecting piece 46 in the left-right direction (insertion direction) is allowed.
When the coupling connecting piece 46 of the heat radiating member 28 is inserted into the insertion recess 62A and the locking projection 63 reaches the position of the through hole 46A, the locking projection 63 is fitted into the through hole 46A and the coupling connecting piece 46 is properly connected. The side separators 56 and 57 are held in a state of being connected to the end portions of the heat radiating member 28.

Next, a method for assembling the power storage unit 21A will be described.
The connection connecting piece 46 of the heat radiating member 28 is inserted into the connection receiving portion 62 of the side separators 56 and 57 to connect the side separators 56 and 57 to the heat radiating member 28 (FIG. 33).
Then, the holding member 32 is mounted on the heat radiating member 28 to which the side separators 56 and 57 are connected (FIGS. 8 and 9). Specifically, the positioning holes 38A and 51A of the side fixing portions 38 and 51 of the holding member 32 are fitted into the positioning convex portions 61 of the side separators 56 and 57, and the positioning of the holding member 32 is positioned in the positioning hole 31 of the heat dissipation member 28. The part 40 is inserted.
As a result, the heat radiating member 28, the side separators 56 and 57, and the holding member 32 are positioned relative to each other.
Next, the power storage element 22A is formed by fitting the power storage element 22 into the power storage element holding portion 33 of the holding member 32, ultrasonically connecting the terminals 23A and 23B and the tab portion 26A, and covering the lead cover 52 (FIG. 6).
When the power storage units 21B to 21F are formed in the same procedure and the power storage units 21A to 21F are alternately stacked by changing the direction by 180 degrees, a stacked body 20 is formed (FIG. 2), and the stacked body 20 is accommodated in the case 11. Thereby, the electrical storage module 10 is formed (FIG. 1).

According to this embodiment, the following operations and effects are achieved.
According to the present embodiment, if the flat surface of each power storage element 22 is placed in a different region of the heat dissipation member 28 for each power storage element 22, the heat of the power storage element 22 can be dissipated through the heat dissipation member 28. Although it becomes possible, if the storage elements 22 are arranged side by side in this way, the degree of freedom of movement of the storage elements 22 is likely to be greater than when the storage elements 22 are stacked one above the other. It is feared that this will occur. According to the present embodiment, since the power storage element 22 can be held in a predetermined region by the holding member 32 even in a configuration in which such a position shift of the power storage element 22 is likely to occur, the position shift of the power storage element 22 is reduced. It becomes possible to prevent.

The holding member 32 includes a positioning portion 40 that positions the heat dissipation member 28 in a direction along a flat surface.
In this way, since the holding member 32 can be positioned in the direction along the flat surface with respect to the heat radiating member 28 by the positioning portion 40, the electric storage element 22 held by the holding member 32 is also in relation to the heat radiating member 28. Thus, it is possible to position in a direction along the flat surface.

The holding member 32 includes a locking piece 43 that is locked to the heat radiating member 28 and restricts movement of the heat radiating member 28 in the separation direction.
In this way, the movement of the heat radiating member 28 in the detaching direction is restricted by the locking piece 43 of the holding member 32, so that the power storage element 22 held by the holding member 32 is moved with respect to the heat radiating member 28. Positioning in the direction of separation becomes possible.

Bus bars 24 and 25 connected to the positive and negative terminals 23A and 23B of the storage element 22, respectively, and the holding member 32 holds the bus bars 24 and 25.
In this way, the power storage element 22 and the bus bars 24 and 25 can be integrally held by the holding member 32. Therefore, stress is further applied to the connection portion between the terminal of the power storage element 22 and the bus bars 24 and 25. Can be prevented.

A plurality of power storage units 21A to 21F in which a plurality of power storage elements 22 placed on the heat dissipation member 28 are held by a holding member 32 are stacked, and the holding member 32 protrudes to the adjacent power storage units 21A to 21E side. A regulation piece 35 that regulates the displacement of the electricity storage element 22 in the adjacent electricity storage units 21A to 21E is provided.
If it does in this way, position shift of the electrical storage element 22 of adjacent electrical storage unit 21A-21E can be prevented by the regulation piece 35 of the holding member 32. FIG.

The holding member 32 includes a holding wall 34 in which the power storage element 22 is fitted and held, and a base end portion of the regulation piece 35 is formed on the holding wall 34.
If it does in this way, the electrical storage element 22 of the adjacent electrical storage units 21A-21E can be hold | maintained using the holding wall 34 for hold | maintaining the electrical storage element 22. FIG.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the example in which the power storage element 22 is a battery has been described, but the power storage element 22 may be a capacitor or the like.
(2) In the above embodiment, the ISG power storage module 10 is used, but the power storage module may be used for other purposes.
(3) The number of power storage elements 22 in each of the power storage units 21A to 21F is not limited to three in the above embodiment, and may be two or four or more. The shape of the holding member can also be appropriately changed according to the number of power storage elements 22.
(4) In the above embodiment, the holding members 32 of the six layers of power storage units 21A to 21F are all the same shape, but may be different shapes.
(5) In the above embodiment, the holding wall 34 has a rectangular frame shape into which the entire circumference of the power storage element 22 is fitted. However, the holding wall 34 is not limited to this as long as the position of the power storage element 22 can be held. For example, the holding wall may be partially divided.

DESCRIPTION OF SYMBOLS 10 ... Power storage module 11 ... Case 20 ... Laminated body 21A-21F ... Power storage unit 22 ... Power storage element 23A, 23B ... Terminal 24 ... 1st bus bar (bus bar)
25. Second bus bar (bus bar)
28 ... Heat dissipation member 30 ... Through hole 31 ... Positioning hole 32 ... Holding member 34 ... Holding wall 35 ... Regulating piece 37 ... Position fixing part 38 ... Side fixing part 38A ... Positioning hole 40 ... Positioning portion 41 ... Busbar holding portion 42 ... Standing wall 43 ... Locking piece 46 ... Connection connecting piece 56 ... First side separator 57 ... .Second side separator 61 ... Positioning convex part 62 ... Connection receiving part 66 ... Interlayer connection piece

Claims (6)

A plurality of flat storage elements,
A heat dissipating member placed in a predetermined region where the flat surface of each power storage element is different for each power storage element;
A holding member that holds each power storage element in the predetermined region of the heat dissipation member ,
A plurality of power storage units in which the plurality of power storage elements placed on the heat dissipation member are held by the holding member are stacked,
The said holding member is an electrical storage module provided with the control piece which protrudes in the said adjacent electrical storage unit side, and controls the position shift of the said electrical storage element in the said adjacent electrical storage unit . The power storage module according to claim 1, wherein the holding member includes a holding wall in which the power storage element is fitted and held, and the heat dissipation member of an adjacent power storage unit is stacked on the power storage element in the power storage unit. . The power storage module according to claim 2 , wherein a base end portion of the restriction piece is formed on the holding wall . The power storage module according to any one of claims 1 to 3, wherein the holding member includes a positioning portion that positions the heat dissipation member in a direction along the flat surface . 5. The power storage module according to claim 1 , wherein the holding member includes a locking piece that is locked to the heat radiating member to restrict movement of the heat radiating member in a separating direction . The power storage module according to any one of claims 1 to 5 , further comprising a bus bar connected to each of a positive electrode terminal and a negative electrode terminal of the power storage element, wherein the holding member holds the bus bar .

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