JP2021061204A - Manufacturing apparatus, manufacturing method and housing body - Google Patents

Abstract

To provide a manufacturing apparatus, etc. capable of manufacturing a housing body for a power storage device that match circumstances of a product on which the power storage device is installed.SOLUTION: A manufacturing apparatus is configured to manufacture a housing body for a power storage device by forming a packaging material 20. The manufacturing apparatus includes a female die 110, a press plate 130, and a male die 120. The female die has a first recessed portion. The press plate has a hole formed at a position where it overlaps with the first recessed portion in plan view. The male die is configured to penetrate the hole and be inserted into the first recessed portion. The packaging material is sandwiched by the female die and the press plate. The first recessed portion includes a first recessed region having a first depth, and a second recessed region which has a second depth deeper than the first depth and is adjacent to the first recessed region. The male die includes a first portion which is located in the first recessed region and sandwiches the packaging material between the first portion and the female die in a state where insertion of the male die into the first recessed portion is completed, and a second portion which is located in the second recessed region, inserted into a deeper position of the first recessed portion than the first portion, and does not sandwich the packaging material between the second portion and the female die.SELECTED DRAWING: Figure 2

Description

The present invention relates to a manufacturing apparatus, a manufacturing method and an accommodating body.

International Publication No. 2015/156327 (Patent Document 1) discloses an embossed type exterior material for a power storage device. In this embossed type exterior material, a recess (molded portion) for accommodating the battery element is formed. This recess is formed by arranging an exterior material on the opening of the die die and allowing the punch die to enter the opening (see Patent Document 1).

International Publication No. 2015/156327

The shape of the molded portion in the housing for the power storage device may not be a rectangular parallelepiped shape, for example, depending on the circumstances of the product on which the power storage device is mounted. However, Patent Document 1 only discloses a method for forming a rectangular parallelepiped molded portion.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a manufacturing apparatus or the like capable of manufacturing an accommodating body for a power storage device suitable for the circumstances of the product on which the power storage device is mounted. To provide.

A manufacturing apparatus according to a certain aspect of the present invention provides an accommodating body for a power storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order. It is configured to be manufactured. The manufacturing apparatus includes a female mold, a holding plate, and a male mold. The female mold has a first recess. The holding plate has a hole formed at a position overlapping the first recess in a plan view. The male mold is configured to penetrate the hole and enter the first recess. The packaging material is sandwiched between the female mold and the presser plate. The first concave portion includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region. The male mold is located in the first concave region and sandwiches the packaging material with the female mold in the state where the entry into the first concave portion is completed, and is located in the second concave region and from the first portion. Also includes a second portion that penetrates deep into the first recess and does not sandwich the packaging material with the female mold.

In this manufacturing apparatus, in a state where the male mold has completely entered the first concave portion, the first portion of the male mold is located in the first concave region and the packaging material is sandwiched between the male mold and the female mold, and the second male mold has a second portion. The portion is located in the second concave region and enters a position deeper in the first recess than the first portion so that the packaging material is not sandwiched between the female mold and the female mold. Therefore, according to this manufacturing apparatus, since the depth of entry in the first recess differs between the first portion and the second portion, the housing (the product on which the power storage device is mounted) having a complicated shape having different depths depending on the position It is possible to manufacture an accommodating body for a power storage device suitable for the above circumstances. Further, according to this manufacturing apparatus, since the second portion does not sandwich the packaging material with the female mold, for example, even if a foreign substance is present on the female mold, wrinkles are formed on the packaging material due to the foreign substance. The situation that occurs can be suppressed.

The female mold includes a female mold body having a second recess and a insert piece that is detachably arranged in the second recess and has a length in the height direction shorter than the second depth, and includes a first concave region. Is formed between the opening end of the female mold and the insert piece, and the second concave region may be formed in the region of the second concave portion where the insert piece is not arranged.

In this manufacturing apparatus, the insert piece is removable. Therefore, according to this manufacturing apparatus, it is possible to manufacture accommodating bodies having various shapes by changing the shape of the insert piece.

The first part may include an advancing / retreating mechanism configured to advance / retreat in the male traveling direction.

In this manufacturing apparatus, after the first part sandwiches the packaging material with the female mold, the first part retracts relatively compared to the second part, and the second part is at a deeper position of the first recess. Enter up to. That is, in this manufacturing apparatus, a shallow molded portion in the container is molded when the first portion sandwiches the packaging material with the female mold, and the second portion enters the deeper position of the first recess. The deep molded part in the container is molded with. Therefore, according to this manufacturing apparatus, since the shallow molded portion and the deep molded portion of the accommodating body are formed stepwise, the accommodating body is compared with the case where the shallow molded portion and the deep molded portion are formed at the same time. It is possible to suppress the load applied to the packaging material at the time of manufacturing.

The insert piece may include an advancing / retreating mechanism configured to advance / retreat in the male traveling direction.

In this manufacturing apparatus, the insert piece retracts after the first portion sandwiches the packaging material with the female mold, and the first portion and the second portion enter deeper into the first recess. That is, in this manufacturing apparatus, a deep molded portion in the container is molded when the first portion sandwiches the packaging material with the female mold, and the first portion and the second portion are located at deeper positions in the first recess. At the stage of entering, a shallow molded portion in the housing is formed. Therefore, according to this manufacturing apparatus, since the shallow molded portion and the deep molded portion of the accommodating body are formed stepwise, the accommodating body is compared with the case where the shallow molded portion and the deep molded portion are formed at the same time. It is possible to suppress the load applied to the packaging material at the time of manufacturing.

The advancing / retreating mechanism may be composed of a spring.

The spring constant of the spring may be 3.6 N / mm or more and 20.4 N / mm or less.

A manufacturing method according to another aspect of the present invention is a housing for a power storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order. Is a method for manufacturing. The manufacturing method includes a step of sandwiching the packaging material between the female mold and the presser plate. The female mold has a recess. The holding plate has a hole formed at a position overlapping the recess in a plan view. The recess includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region. The manufacturing method includes a step of penetrating the hole and allowing the male mold to enter the recess, a step of locating the first portion of the male mold in the first concave region and sandwiching the packaging material between the first portion and the female mold, and a second. It further includes a step of locating the second portion of the male mold in the concave region and allowing the second portion to enter deeper into the recess than the first portion so that the packaging material is not sandwiched between the second portion and the female mold.

In this manufacturing method, in a state where the male mold has completely entered the first concave portion, the first portion of the male mold is located in the first concave region and the packaging material is sandwiched between the male mold and the female mold, and the second male mold is formed. The portion is located in the second concave region and enters a position deeper in the first recess than the first portion so that the packaging material is not sandwiched between the female mold and the female mold. Therefore, according to this manufacturing method, since the depth of entry in the first recess differs between the first portion and the second portion, it is possible to manufacture an accommodating body having a complicated shape having different depths depending on the position. Further, according to this manufacturing method, since the second portion does not sandwich the packaging material with the female mold, for example, even if a foreign substance is present on the female mold, wrinkles are formed on the packaging material due to the foreign substance. The situation that occurs can be suppressed.

A container according to another aspect of the present invention is manufactured by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer and a thermosetting resin layer in this order by a manufacturing apparatus. It is a housing for a power storage device. The manufacturing apparatus includes a female mold, a holding plate, and a male mold. The female mold has a recess. The holding plate has a hole formed at a position overlapping the recess in a plan view. The male mold is configured to penetrate the hole and enter the recess. The packaging material is sandwiched between the female mold and the presser plate. The recess includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region. The male mold is located in the first concave region and sandwiches the packaging material with the female mold in the state where the entry into the concave portion is completed, and is located in the second concave region and is the first portion than the first portion. 1 Includes a second part that penetrates deep into the recess and does not sandwich the packaging material with the female mold.

According to the present invention, it is possible to provide a manufacturing apparatus or the like capable of manufacturing an accommodating body for a power storage device suitable for the circumstances of the product on which the power storage device is mounted.

It is a figure which shows the outline of the manufacturing apparatus according to Embodiment 1. It is a figure which shows the outline of the molding unit. It is a figure which shows the outline of the state which the female type was seen from below. FIG. 3 is a sectional view taken along line IV-IV of FIG. It is a figure which shows the outline of the state which the holding plate and the male form were seen from above. FIG. 5 is a sectional view taken along line VI-VI of FIG. It is a figure which shows the state which the male type does not enter a hole of a female type when a female type does not include a insertion piece. It is a figure which shows the state in which a male type is in the process of entering a hole of a female type when a female type does not include a insertion piece. It is a figure which shows the state which the male type has completed entry into the hole of a female type when the female type does not include a insertion piece. It is a figure which shows the state which a male type does not enter a hole of a female type. It is a figure which shows the state in which a male type is entering a hole of a female type. It is a figure which shows the state which the male type has completed entry into the female type hole. It is a figure which shows the molded article manufactured by a manufacturing apparatus. It is a figure which shows the outline of the state which the holding plate and the male mold were seen from above in Embodiment 2. FIG. FIG. 10 is a cross-sectional view taken along the line XI-XI of FIG. It is a figure which shows the state which the male type does not enter a hole of a female type in Embodiment 2. In the second embodiment, it is a figure which shows the state in which a male type is entering a hole of a female type. FIG. 2 is a diagram showing a state in which the male type has completed entry into the female type hole in the second embodiment. It is a figure which shows the outline of the state which the female mold was seen from below in Embodiment 3. It is a cross-sectional view of XIV-XIV of FIG. FIG. 3 is a diagram showing a state in which the male type does not enter the hole of the female type in the third embodiment. FIG. 3 is a diagram showing a state in which the male type is in the process of entering the hole of the female type in the third embodiment. FIG. 3 is a diagram showing a state in which the male type has completed entry into the female type hole in the third embodiment. It is the figure which looked at the female hole from the bottom. It is a figure which shows the shape of the molded article in the modification 1. It is a figure which shows the shape of the molded article in the modification 2. It is a figure which shows the shape of the molded article in the modification 3. It is a figure which shows the shape of the molded article in the modification 4. It is a figure which shows the shape of the molded article in the modification 5. It is a figure which shows the shape of the molded article in the modification 6. It is a figure which shows the shape of the molded article in the modification 7. It is a figure which shows the 1st arrangement example of the electrode tab in a power storage device. It is a figure which shows the 2nd arrangement example of the electrode tab in a power storage device. It is a figure which shows the 3rd arrangement example of the electrode tab in a power storage device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and the description thereof will not be repeated.

[1. Embodiment 1]
<1-1. Overview of manufacturing equipment>
FIG. 1 is a diagram showing an outline of a manufacturing apparatus 10 according to the first embodiment. The manufacturing apparatus 10 uses a method in which the packaging material 20 is unwound from the take-up body attached to the reel 30 described later, the packaging material 20 is molded by the molding unit 100 on the downstream side, and the packaging material 20 is cut in the width direction. For example, it is configured to manufacture an accommodating body for a power storage device. The directions indicated by the arrows UDLRFB (up / down / left / right / front / rear) in FIG. 1 are common to each drawing.

As shown in FIG. 1, the manufacturing apparatus 10 includes a reel 30, a transfer unit 40, servo mechanisms 200 and 300, and a molding unit 100.

The reel 30 is configured to feed out the sheet-shaped packaging material 20. The packaging material 20 is a so-called laminated film, and is composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order.

The base material layer contained in the packaging material 20 is a layer for imparting heat resistance to the packaging material 20 and suppressing the occurrence of pinholes that may occur during processing or distribution. The base material layer is composed of, for example, at least one layer of a stretched polyester resin layer and a stretched polyamide resin layer. For example, when the base material layer contains at least one layer of the stretched polyester resin layer and the stretched polyamide resin layer, the barrier layer can be protected during the molding process of the packaging material 20 and the breakage of the packaging material 20 can be suppressed. Further, from the viewpoint of increasing the tensile elongation of the packaging material 20, the stretched polyester resin layer is preferably a biaxially stretched polyester resin layer, and the stretched polyamide resin layer is preferably a biaxially stretched polyamide resin layer. Further, from the viewpoint of excellent piercing strength or impact strength, the stretched polyester resin layer is more preferably a biaxially stretched polyethylene terephthalate (PET) film, and the stretched polyamide resin layer is preferably a biaxially stretched nylon (ONy) film. More preferable. The base material layer may be composed of both a stretched polyester resin layer and a stretched polyamide resin layer.

Further, the barrier layer contained in the packaging material 20 is made of, for example, aluminum foil in terms of processability such as moisture resistance and ductility and cost. The aluminum foil preferably contains iron from the viewpoint of excellent pinhole resistance and ductility during molding. The iron content in the aluminum foil is preferably 0.5 to 5.0% by mass, more preferably 0.7 to 2.0% by mass. When the iron content is 0.5% by mass or more, excellent pinhole resistance and ductility of the packaging material 20 can be obtained. Further, when the iron content is 5.0% by mass or less, excellent flexibility of the packaging material 20 can be obtained.

The thickness of the barrier layer is preferably, for example, 30 to 60 μm, and more preferably 40 to 60 μm from the viewpoint of barrier property, pinhole resistance, and moldability. When the thickness of the barrier layer is 30 μm or more, it is difficult to break even if stress is applied by the molding process. When the thickness of the barrier layer is 60 μm or less, the increase in mass of the packaging material 20 can be reduced, and the decrease in weight energy density of the power storage device can be suppressed.

The thermosetting resin layer contained in the packaging material 20 is a layer that imparts sealing properties to the packaging material 20 by heat sealing. Examples of the heat-sealing resin layer include a resin film made of a polyolefin resin or an acid-modified polyolefin resin obtained by graft-modifying a polyolefin resin with an acid such as maleic anhydride.

The transport unit 40 is configured to transport the packaging material 20 from the upstream side to the downstream side of the manufacturing apparatus 10. Each of the servo mechanisms 200 and 300 is configured to control the drive of the molding unit 100. The molding unit 100 is configured to mold the packaging material 20 by receiving driving force from each of the servo mechanisms 200 and 300. When the molding by the molding unit 100 is completed, the molded product 50 (accommodating body) is completed.

<1-2. Molding unit configuration>
FIG. 2 is a diagram showing an outline of the molding unit 100. As shown in FIG. 2, the molding unit 100 includes a base 102, a female mold 110, a base 104, a plurality of air cylinders 132, a holding plate 130, a male mold 120, and a plurality of pillars 106. Includes.

A female mold 110 is attached below the base 102 (in the direction of arrow D). The base 102 is movable in the vertical direction with respect to each pillar 106. The base 102 moves in the vertical direction by the driving force supplied from the servo mechanism 200.

FIG. 3 is a diagram showing an outline of a state in which the female mold 110 is viewed from below. FIG. 4 is a sectional view taken along line IV-IV of FIG. As shown in FIGS. 3 and 4, the female mold 110 has a rectangular shape in a plan view, and includes a female mold main body 112 and a plurality (two) insert pieces 114. A hole H1 is formed on the lower surface of the female main body 112, and a plurality of insertion pieces 114 are detachably arranged in the hole H1.

Specifically, one insertion piece 114 is arranged at the end of the hole H1 in the direction of the arrow F, and the other insertion piece 114 is arranged at the end of the hole H1 in the direction of the arrow B. Further, each insert piece 114 is fixed to the female main body 112 by a fixing member such as a screw. The length of each insert piece 114 in the height direction (arrow UD direction) is shorter than the depth of the deepest position of the hole H1. As a result, in the hole H1, a first concave region T1 having a first depth (a region below the insertion piece 114) and a second concave region T2 having a second depth deeper than the first depth. (Area on the side of each insert piece 114) is formed.

A cutting blade (not shown) is provided on the downstream side (in the direction of arrow R) of the hole H1. In the female mold 110, the hole H1 only needs to be formed with a recess, and does not necessarily have to penetrate the hole H1. In the present invention, the "recess" does not simply mean a recess, but also includes a through hole. At the time of molding the packaging material 20, the base 102 (FIG. 2) is lowered, and the lower surface of the female mold 110 comes into contact with the upper surface (base material layer (outermost layer)) of the packaging material 20.

With reference to FIG. 2 again, a holding plate 130 is attached above the base 104 (in the direction of arrow U) via a plurality of air cylinders 132. The presser plate 130 can move in the vertical direction by the driving force supplied from the air cylinder 132. At the time of molding the packaging material 20, the pressing plate 130 is further pressed upward with the packaging material 20 sandwiched between the female mold 110 and the pressing plate 130. That is, at the time of molding the packaging material 20, the upper surface of the pressing plate 130 comes into contact with the lower surface of the packaging material 20 (thermosetting resin layer (innermost layer)).

FIG. 5 is a diagram showing an outline of a state in which the presser plate 130 and the male type 120 are viewed from above. As shown in FIG. 5, the presser plate 130 has a rectangular shape in a plan view, and a through hole H2 is formed on the upper surface of the presser plate 130. The position of the hole H2 in the molding unit 100 is a position that overlaps with the hole H1 (FIGS. 2 and 3) in a plan view. An air cylinder 132 is arranged below each of the four corners of the presser plate 130.

With reference to FIG. 2 again, the male mold 120 can move in the vertical direction through the hole H2 formed in the holding plate 130. The male type 120 moves in the vertical direction by the driving force supplied from the servo mechanism 300. As the male 120 moves upward, the male 120 enters the hole H1 formed in the female 110. The packaging material 20 is formed by the male mold 120 entering the hole H1 while the packaging material 20 is sandwiched between the female mold 110 and the holding plate 130, and the female mold 110 is formed on the downstream side of the hole H1. The packaging material 20 is cut in the width direction (arrow FB direction) by a cutting blade (not shown) provided in the (arrow R direction).

With reference to FIG. 5 again, the shape of the male 120 in plan view is rectangular and has long and short sides. The length of the long side is, for example, 150 mm or more, and the length of the short side is, for example, 50 mm or more. Further, a groove G1 for allowing air to escape during molding of the packaging material 20 is formed on the upper surface of the male mold 120.

FIG. 6 is a sectional view taken along line VI-VI of FIG. As shown in FIG. 6, the male type 120 has two types of portions having different lengths in the height direction (arrow UD direction). Specifically, the male type 120 has a first portion P1 (two places) having a length in the first height direction and a length in the second height direction longer than the length in the first height direction. It has a second portion P2 having a height.

One first portion P1 extends in the direction of arrow B from the end of the second portion P2 in the direction of arrow B, and the other first portion P1 extends in the direction of arrow F from the end of the second portion P2 in the direction of arrow F. There is. The first portion P1 and the second portion P2 are integrally formed, and the lower surfaces of the first portion P1 and the second portion P2 are flush with each other. That is, the second portion P2 extends upward from the first portion P1. When the male type 120 enters the hole H1 (FIGS. 2 and 3), the first portion P1 enters the first concave region T1 (FIG. 4) and the second portion P2 enters the second concave region T2.

<1-3. Reasons for placing pieces>
As described above, the manufacturing apparatus 10 is configured to manufacture an accommodating body (molded product 50) for a power storage device. In such an accommodating body, a molded portion for accommodating the battery element is formed. The shape of the molded portion may not be a rectangular parallelepiped shape, for example, depending on the circumstances of the product on which the power storage device is mounted.

For example, when the product on which the power storage device is mounted is a small electronic device, it is necessary to accommodate the power storage device in a limited space. Since the limited space is not necessarily a rectangular parallelepiped shape, if various shapes can be realized as the shape of the molded portion, it can contribute to the miniaturization of electronic devices.

Further, for example, a power storage device mounted on an electric vehicle is required to have a high volumetric energy density. Since the area occupied by the member accommodated in the power storage device is not necessarily a rectangular parallelepiped shape, the volumetric energy density of the power storage device can be further increased if various shapes can be realized as the shape of the molded portion.

Further, for example, it may be preferable that the shape of the molded portion is not a rectangular parallelepiped shape in relation to other parts mounted on the product. For example, molding of an accommodating body to secure a place for placing an electronic circuit (for example, an ECU (Electronic Control Unit)), a water cooling circuit for cooling a power storage device, or a heat radiation sheet for heat dissipation of the power storage device. It may be preferable that the shape of the portion is not a rectangular parallelepiped shape. In such a case, if various shapes can be realized as the shape of the molded portion, the internal space of the product can be utilized more effectively.

In the manufacturing apparatus 10 according to the first embodiment, the insert piece 114 is arranged in the female mold main body 112 in order to manufacture the molded product 50 in which the molded portion has two types of regions having different depths. First, what kind of molded product is manufactured when the insert piece 114 is not arranged in the female mold main body 112 will be described.

FIG. 7A is a diagram showing a state in which the male type 120 does not enter the hole (recess) of the female type 110X when the female type 110X does not include the insertion piece 114. As shown in FIG. 7A, the packaging material 20 is sandwiched between the pressing plate 130 and the female mold 110X.

FIG. 7B is a diagram showing a state in which the male type 120 is in the process of entering the hole of the female type 110X when the female type 110X does not include the insertion piece 114. As shown in FIG. 7B, when the male mold 120 starts to enter the hole of the female mold 110X, the molded portion starts to be molded in the packaging material 20.

FIG. 7C is a diagram showing a state in which the male type 120 has completely entered the hole of the female type 110X when the female type 110X does not include the insertion piece 114. As shown in FIG. 7C, when the male mold 120 has entered the hole of the female mold 110X, the molding of the molded portion is completed. In the molded portion molded by such a method, the stepped portion at the boundary between the first portion P1 (FIG. 6) of the male mold 120 and the second portion P2 of the male mold 120 is clearly formed on the packaging material 20. Not. That is, it is not possible to obtain a container having a desired shape by such a method.

Next, in the manufacturing apparatus 10 according to the first embodiment, what kind of molded product is manufactured when the female mold 110 includes the insert piece 114 will be described.

FIG. 8A is a diagram showing a state in which the male type 120 does not enter the hole H1 (FIGS. 2 and 3) of the female type 110. As shown in FIG. 8A, the packaging material 20 is sandwiched between the pressing plate 130 and the female mold 110.

FIG. 8B is a diagram showing a state in which the male type 120 is in the process of entering the hole H1 of the female type 110. As shown in FIG. 8B, when the male mold 120 starts to enter the hole H1 of the female mold 110, the molded portion starts to be molded in the packaging material 20.

FIG. 8C is a diagram showing a state in which the male type 120 has completed the entry into the hole H1 of the female type 110. As shown in FIG. 8C, when the male mold 120 has entered the hole H1 of the female mold 110, the molding of the molded portion is completed. In this state, the first portion P1 (FIG. 6) of the male mold 120 is located in the first concave region T1 (FIG. 4) in the hole H1 and sandwiches the packaging material 20 with the insertion piece 114. Further, the second portion P2 (FIG. 6) is located in the second concave region T2 (FIG. 4) in the hole H1 and enters a position deeper in the hole H1 than the first portion P1 and is between the female main body 112. The packaging material 20 is not sandwiched.

FIG. 9 is a diagram showing a molded product 50 manufactured by the manufacturing apparatus 10 according to the first embodiment. With reference to FIG. 9, the upper part shows a plan view of the molded product 50, and the lower part shows a side view of the molded product 50. As shown in FIG. 9, the molded product 50 includes a flange portion 53, a molded portion 51 that rises upward from the flange portion 53, and a molded portion 52 that rises further above the molded portion 51. That is, in the molded portion of the molded product 50 manufactured by the manufacturing apparatus 10 according to the first embodiment, the stage of the boundary between the first portion P1 (FIG. 6) of the male mold 120 and the second portion P2 of the male mold 120. A portion (a step portion at the boundary between the molded portion 51 and the molded portion 52) is clearly formed on the packaging material 20. That is, according to the manufacturing apparatus 10 according to the first embodiment, since the female mold 110 includes the insert piece 114, an accommodating body having a desired shape can be obtained.

<1-4. Features>
As described above, in the manufacturing apparatus 10 according to the first embodiment, the first portion P1 of the male mold 120 is in the first concave region T1 in a state where the male mold 120 has completely entered the hole H1 of the female mold 110. The packaging material 20 is sandwiched between the female mold 110 (insertion piece 114), and the second portion P2 of the male mold 120 is located in the second concave region T2 and is deeper than the first portion P1 in the hole H1. Do not enter and sandwich the packaging material 20 with the female mold 110. Therefore, according to the manufacturing apparatus 10, since the depth of entry in the hole H1 differs between the first portion P1 and the second portion P2, an accommodating body (storage device) having a complicated shape having different depths depending on the position is mounted. It is possible to manufacture an accommodating body for a power storage device that suits the circumstances of the product. Further, according to the manufacturing apparatus 10, since the second portion P2 does not sandwich the packaging material 20 with the female mold 110, for example, even if a foreign substance is present on the packaging material 20, the packaging material is caused by the foreign substance. It is possible to suppress the situation where wrinkles are formed on the top 20.

Further, in the manufacturing apparatus 10, the insert piece 114 is removable. Therefore, according to the manufacturing apparatus 10, by changing the shape of the insert piece 114, an accommodating body (molded product 50) having various shapes can be manufactured.

[2. Embodiment 2]
In the manufacturing apparatus 10 according to the first embodiment, the molding portion 51 and the molding portion 52 were molded substantially at the same time. However, when the molded portion 51 and the molded portion 52 are molded substantially at the same time, the load applied to the packaging material 20 is not necessarily small. In the manufacturing apparatus according to the second embodiment, the configuration of the male mold 120A is changed as compared with the first embodiment in order to make the molding timings of the molding section 51 and the molding section 52 different. Hereinafter, the points common to the first embodiment will not be repeated, and the points different from the first embodiment will be mainly described.

<2-1. Molding unit configuration>
FIG. 10 is a diagram showing an outline of a state in which the presser plate 130 and the male type 120A are viewed from above in the second embodiment. With reference to FIG. 10, the male type 120A can move in the vertical direction through the hole H2 formed in the holding plate 130.

FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. As shown in FIG. 11, the male type 120A includes a male type main body 121A, a plurality (two) movable portions 123A, and a plurality of springs 122A. The male body 121A has two types of portions having different lengths in the height direction (arrow UD direction). From the lower end of the portion having a long length in the height direction, a portion having a short length in the height direction extends in each of the arrow BF directions.

A movable portion 123A is attached to each of the portions of the male main body 121A having a short length in the height direction via a plurality of springs 122A. Since each movable portion 123A is attached to the male mold main body 121A via a spring 122A, it is possible to advance and retreat in the traveling direction of the male mold 120. The spring constant of each spring 122A is, for example, 3.6 N / mm or more and 20.4 N / mm or less.

<2-2. Operation>
FIG. 12A is a diagram showing a state in which the male type 120A does not enter the hole H1 (FIGS. 2 and 3) of the female type 110 in the second embodiment. FIG. 12B is a diagram showing a state in which the male type 120A is in the process of entering the hole H1 of the female type 110. FIG. 12C is a diagram showing a state in which the male type 120A has completed the entry into the hole H1 of the female type 110. Hereinafter, the operation of the manufacturing apparatus according to the second embodiment will be described with reference to FIGS. 12A-12C.

As shown in FIG. 12A, the packaging material 20 is sandwiched between the pressing plate 130 and the female mold 110.

As shown in FIG. 12B, when the male mold 120A starts to enter the hole H1 of the female mold 110, the molded portion starts to be molded in the packaging material 20. Then, the entry of each movable portion 123A into the first concave region T1 (FIG. 4) is completed, and the packaging material 20 is sandwiched between the movable portion 123A and the insertion piece 114. That is, at this stage, the molded portion 51 of the molded product 50 (FIG. 9) is molded.

As shown in FIG. 12C, when the male type 120A further enters the hole H1 from the state shown in FIG. 12B, the male type main body 121A enters to a deeper position of the hole H1 and each spring 122A contracts and is movable. The portion 123A recedes relative to the male body 121A. As a result, the molded portion 52 of the molded product 50 is molded. In this state, the movable portion 123A of the male type 120A is located in the first concave region T1 (FIG. 4) in the hole H1 and sandwiches the packaging material 20 with the insertion piece 114. Further, the male main body 121A is located in the second concave region T2 (FIG. 4) in the hole H1 and enters a position deeper in the hole H1 than the movable portion 123 to sandwich the packaging material 20 with the female main body 112. Not. As a result, the molded product 50 shown in FIG. 9 is manufactured.

<2-3. Features>
As described above, in the manufacturing apparatus according to the second embodiment, after the movable portion 123A sandwiches the packaging material 20 with the female mold 110 (insertion piece 114), the movable portion 123A is compared with the male mold main body 121A. The male body 121A enters the deeper position of the hole H1. That is, in this manufacturing apparatus, a shallow molded portion (molded portion 51 (FIG. 9)) in the accommodating body is formed when the movable portion 123A sandwiches the packaging material 20 with the female mold 110 (insert piece 114). When the male body 121A has entered the deeper position of the hole H1, the deep molded portion (molded portion 52) in the accommodating body is formed. Therefore, according to this manufacturing apparatus, since the shallow molded portion and the deep molded portion of the accommodating body are formed stepwise, the accommodating body is compared with the case where the shallow molded portion and the deep molded portion are formed at the same time. It is possible to suppress the load applied to the packaging material 20 at the time of manufacturing.

[3. Embodiment 3]
In the second embodiment, the male type 120A includes a spring 122A. However, it does not necessarily have to be male to include the spring. In the third embodiment, the female type 110B includes a spring. In the following, the points common to the first embodiment will not be repeated, and the points different from the first embodiment will be mainly described.

<3-1. Molding unit configuration>
FIG. 13 is a diagram showing an outline of a state in which the female mold 110B is viewed from below in the third embodiment. FIG. 14 is a cross-sectional view taken along the line XIV-XIV of FIG. As shown in FIGS. 13 and 14, the female mold 110B includes the female mold main body 112, the insert piece 114B, and the spring 116B.

One insert piece 114B is attached to the female body 112 via a spring 116B at the end of the hole H1B in the arrow F direction, and the other insert piece 114B is attached to the female body 112 via a spring 116B at the end of the hole H1B in the arrow B direction. It is attached to the female body 112. Further, the lower end of each insertion piece 114B (the end in the arrow D direction) is flush with the lower end of the female main body 112.

<3-2. Operation>
FIG. 15A is a diagram showing a state in which the male type 120 does not enter the hole H1B (FIG. 13) of the female type 110B in the third embodiment. FIG. 15B is a diagram showing a state in which the male type 120 is in the process of entering the hole H1B of the female type 110B. FIG. 15C is a diagram showing a state in which the male type 120 has completed the entry of the male type 120 into the hole H1B of the female type 110B. Hereinafter, the operation of the manufacturing apparatus according to the third embodiment will be described with reference to FIGS. 15A-15C.

As shown in FIG. 15A, the packaging material 20 is sandwiched between the pressing plate 130 and the female mold 110B.

As shown in FIG. 15B, when the male mold 120 starts to enter the hole H1B of the female mold 110B, the molding portion starts to be molded in the packaging material 20. Then, when the packaging material 20 is sandwiched between the first portion P1 (FIG. 6) and the insert piece 114B, the molding portion 52 (FIG. 9) is formed.

As shown in FIG. 15C, when the male type 120 further enters the hole H1B from the state shown in FIG. 15B, the male type 120 enters the hole H1B to a deeper position, and each spring 116B contracts and each insert. Piece 114B retreats. As a result, the molded portion 51 of the molded product 50 is molded. In this state, the first portion P1 of the male mold 120 is located at a position corresponding to the first concave region T1 (FIG. 4) in the hole H1B, and sandwiches the packaging material 20 with the insertion piece 114B. Further, the second portion P2 of the male mold 120 is located at a position corresponding to the second concave region T2 (FIG. 4) in the hole H1B and enters a position deeper in the hole H1B than the first portion P1 to enter the female mold main body 112. The packaging material 20 is not sandwiched between and. As a result, the molded product 50 shown in FIG. 9 is manufactured.

<3-3. Features>
As described above, in the manufacturing apparatus according to the third embodiment, the insert piece 114B retracts after the first portion P1 sandwiches the packaging material 20 with the female mold 110B (insertion piece 114B), and the first portion P1 and the second portion P2 enter deeper into the hole H1B. That is, in this manufacturing apparatus, when the first portion P1 sandwiches the packaging material 20 with the female mold 110B (insertion piece 114B), the deep molding portion (molding portion 52 (FIG. 9)) in the container is molded. Then, when the first portion P1 and the second portion P2 have entered the deeper position of the hole H1B, a shallow molded portion (molded portion 51) in the accommodating body is formed. Therefore, according to this manufacturing apparatus, since the shallow molded portion and the deep molded portion of the accommodating body are formed stepwise, the accommodating body is compared with the case where the shallow molded portion and the deep molded portion are simultaneously molded. It is possible to suppress the load applied to the packaging material at the time of manufacturing.

[4. Modification example]
Although the first and third embodiments have been described above, the present invention is not limited to the first and third embodiments, and various modifications can be made without departing from the spirit of the present invention. Hereinafter, a modified example will be described.

<4-1>
In the second embodiment, the movable portion 123A is attached to the male main body 121A via the spring 122A, and in the third embodiment, the insert piece 114B is attached to the female main body 112 via the spring 116B. However, these do not necessarily have to be springs. For example, it may be an elastic body such as rubber. That is, the movable portion 123A may be attached to the male main body 121A via an elastic body such as rubber, or the insert piece 114B may be attached to the female main body 112 via an elastic body such as rubber.

Further, for example, a mechanism including a servomotor and a ball screw may be provided between them. That is, the movable portion 123A may be attached to the male main body 121A via the mechanism, or the insert piece 114B may be attached to the female main body 112 via the mechanism. In this case, a program for driving the servomotor at a required timing is executed in the manufacturing apparatus.

<4-2>
Further, in the above-described first embodiment, the molded product 50 (FIG. 9) was manufactured. However, the molded product produced is not necessarily limited to the molded product 50. That is, the placement locations of the insertion pieces 114 and 114B are not limited to the above-described first and third embodiments. For example, by changing the arrangement of the insert pieces 114 and 114B, molded products having various shapes can be manufactured.

FIG. 16 is a view of the hole H1 of the female mold 110 as viewed from below. With reference to FIG. 16, for example, the insert pieces 114 are arranged in any or a plurality of regions S1-region S11, and molded products having various shapes are manufactured by using a male mold corresponding to the shape of the arranged insert pieces. be able to.

FIG. 17A is a diagram showing the shape of the molded product 50A in the first modification. As shown in FIG. 17A, in the molded product 50A, a step between the molded portion 51A and the molded portion 52A is formed on only one side. The molded product 50A is manufactured, for example, in a state where the insert pieces are arranged in the region S3.

FIG. 17B is a diagram showing the shape of the molded product 50B in the modified example 2. As shown in FIG. 17B, in the molded product 50B, a step between the molded portion 51B and the molded portion 52B is formed in an L shape. The molded product 50B is manufactured, for example, in a state where insert pieces are arranged in the regions S3 and S6.

FIG. 17C is a diagram showing the shape of the molded product 50C in the modified example 3. As shown in FIG. 17C, in the molded product 50C, a step between the molded portion 51C and the molded portion 52C is formed in a U shape. The molded product 50C is manufactured, for example, in a state where insert pieces are arranged in the regions S1, the region S3, and the region S5.

FIG. 17D is a diagram showing the shape of the molded product 50D in the modified example 4. As shown in FIG. 17D, in the molded product 50D, steps between the molded portion 51D and the molded portion 52D are formed on all four sides (entire circumference). The molded product 50D is manufactured, for example, in a state where insert pieces are arranged in the regions S1, the region S3, the region S5, and the region S6.

FIG. 17E is a diagram showing the shape of the molded product 50E in the modified example 5. As shown in FIG. 17E, in the molded product 50E, in addition to the step between the molded portion 51E and the molded portion 52E, a step between the molded portion 52E and the molded portion 54E is formed. The molded product 50E is manufactured, for example, in a state where insert pieces are arranged in the regions S1, the region S2, the region S3, and the region S4. In this case, the height of the insert pieces arranged in the areas S2 and S4 is shorter than the height of the insert pieces arranged in the areas S1 and S3.

FIG. 17F is a diagram showing the shape of the molded product 50F in the modified example 6. As shown in FIG. 17F, in the molded product 50F, the molded portion 51F does not extend over the entire side but is divided at one side. The molded product 50F is manufactured, for example, in a state where insert pieces are arranged in the area S7, the area S8, the area S9, and the area S10.

FIG. 17G is a diagram showing the shape of the molded product 50G in the modified example 7. As shown in FIG. 17G, in the molded product 50G, a recess is formed in the molded portion 52G. The molded product 50G is manufactured, for example, in a state where insert pieces are arranged in the regions S1, the region S3, and the region S11.

<4-3>
Further, when the power storage device is manufactured using the molded product 50 manufactured in the above-described first embodiment, the electrode tab may be arranged at any place.

FIG. 18A is a diagram showing a first arrangement example of the electrode tab 61A in the power storage device 60A. FIG. 18B is a diagram showing a second arrangement example of the electrode tab 61B in the power storage device 60B. FIG. 18C is a diagram showing a third arrangement example of the electrode tab 61C in the power storage device 60C.

As shown in FIG. 18A, each electrode tab 61A is arranged on each side of the power storage device 60A where a step (a step between the molded portion 51 and the molded portion 52) is formed. In this case, the positive electrode, the negative electrode and the separator are housed in the molding section 52, and the current collector foil connecting each of the positive electrode and the negative electrode and the electrode tab 61A is housed in the molding section 51. Since the current collector foil does not have a thickness as compared with the positive electrode, the negative electrode and the separator, such an arrangement can reduce the dead space in the housing.

Further, as shown in FIG. 18B, each electrode tab 61B may be provided on the same long side in the power storage device 60B, or as shown in FIG. 18C, each electrode tab 61C has a different length in the power storage device 60C. It may be provided on the side.

<4-4>
Further, the molded product 50 manufactured in the above-described first to third embodiments was used as an accommodating body for the power storage device. That is, the molded product 50 contains a battery element (including a capacitor, a capacitor, etc.) such as a lithium ion battery, and constitutes a laminated battery. A laminated battery in which a secondary battery such as a lithium ion battery is housed is an example of a power storage device, and either a primary battery or a secondary battery may be housed in the house. Preferably, a secondary battery is housed in the containment body. The type of secondary battery housed in the container is not particularly limited, and for example, a lithium ion battery, a lithium ion polymer battery, an all-solid battery, a lead storage battery, a nickel / hydrogen storage battery, a nickel / cadmium storage battery, and a nickel / iron. Examples thereof include storage batteries, nickel / zinc storage batteries, silver oxide / zinc storage batteries, metal air batteries, polyvalent cation batteries, capacitors, and capacitors.

10 Manufacturing equipment, 20 packaging materials, 30 reels, 40 transport units, 50, 50A-50G molded products, 51, 51A-51G, 52, 52A-52G, 54E molded parts, 53, 53A-53G flange parts, 60A-60C Power storage device, 61A-61C electrode tab, 100 molding unit, 102,104 base, 106 pillars, 110, 110X, 110B female type, 112 female type body, 114, 114B insert piece, 116B, 122A spring, 120, 120A male Mold, 121A male body, 123A movable part, 130 presser plate, 132 air cylinder, 200,300 servo mechanism, G1 groove, H1, H2 hole, P1 first part, P2 second part, S1-S11 area, T1 first 1 concave area, T2 2nd concave area.

The present invention relates to a manufacturing apparatus, a manufacturing method and an accommodating body.

International Publication No. 2015/156327 (Patent Document 1) discloses an embossed type exterior material for a power storage device. In this embossed type exterior material, a recess (molded portion) for accommodating the battery element is formed. This recess is formed by arranging an exterior material on the opening of the die die and allowing the punch die to enter the opening (see Patent Document 1).

International Publication No. 2015/156327

The shape of the molded portion in the housing for the power storage device may not be a rectangular parallelepiped shape, for example, depending on the circumstances of the product on which the power storage device is mounted. However, Patent Document 1 only discloses a method for forming a rectangular parallelepiped molded portion.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a manufacturing apparatus or the like capable of manufacturing an accommodating body for a power storage device suitable for the circumstances of the product on which the power storage device is mounted. To provide.

A manufacturing apparatus according to a certain aspect of the present invention provides an accommodating body for a power storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order. It is configured to be manufactured. The manufacturing apparatus includes a female mold, a holding plate, and a male mold. The female mold has a first recess. The holding plate has a hole formed at a position overlapping the first recess in a plan view. The male mold is configured to penetrate the hole and enter the first recess. The packaging material is sandwiched between the female mold and the presser plate. The first concave portion includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region. The male mold is located in the first concave region and sandwiches the packaging material with the female mold in the state where the entry into the first concave portion is completed, and is located in the second concave region and from the first portion. Also includes a second portion that penetrates deep into the first recess and does not sandwich the packaging material with the female mold.

In this manufacturing apparatus, in a state where the male mold has completely entered the first concave portion, the first portion of the male mold is located in the first concave region and the packaging material is sandwiched between the male mold and the female mold, and the second male mold is formed. The portion is located in the second concave region and enters a position deeper in the first recess than the first portion so that the packaging material is not sandwiched between the female mold and the female mold. Therefore, according to this manufacturing apparatus, since the depth of entry in the first recess differs between the first portion and the second portion, the housing (the product on which the power storage device is mounted) having a complicated shape having different depths depending on the position It is possible to manufacture an accommodating body for a power storage device suitable for the above circumstances. Further, according to this manufacturing apparatus, since the second portion does not sandwich the packaging material with the female mold, for example, even if a foreign substance is present on the female mold, wrinkles are formed on the packaging material due to the foreign substance. The situation that occurs can be suppressed.

The female mold includes a female mold body having a second recess and a insert piece that is detachably arranged in the second recess and has a length in the height direction shorter than the second depth, and includes a first concave region. Is formed between the opening end of the female mold and the insert piece, and the second concave region may be formed in the region of the second concave portion where the insert piece is not arranged.

In this manufacturing apparatus, the insert piece is removable. Therefore, according to this manufacturing apparatus, it is possible to manufacture accommodating bodies having various shapes by changing the shape of the insert piece.

The first part may include an advancing / retreating mechanism configured to advance / retreat in the male traveling direction.

In this manufacturing apparatus, after the first part sandwiches the packaging material with the female mold, the first part retracts relatively compared to the second part, and the second part is at a deeper position of the first recess. Enter up to. That is, in this manufacturing apparatus, a shallow molded portion in the container is molded when the first portion sandwiches the packaging material with the female mold, and the second portion enters the deeper position of the first recess. The deep molded part in the container is molded with. Therefore, according to this manufacturing apparatus, since the shallow molded portion and the deep molded portion of the accommodating body are formed stepwise, the accommodating body is compared with the case where the shallow molded portion and the deep molded portion are formed at the same time. It is possible to suppress the load applied to the packaging material at the time of manufacturing.

The insert piece may include an advancing / retreating mechanism configured to advance / retreat in the male traveling direction.

In this manufacturing apparatus, the insert piece retracts after the first portion sandwiches the packaging material with the female mold, and the first portion and the second portion enter deeper into the first recess. That is, in this manufacturing apparatus, a deep molded portion in the container is molded when the first portion sandwiches the packaging material with the female mold, and the first portion and the second portion are located at deeper positions in the first recess. At the stage of entering, a shallow molded portion in the housing is formed. Therefore, according to this manufacturing apparatus, since the shallow molded portion and the deep molded portion of the accommodating body are formed stepwise, the accommodating body is compared with the case where the shallow molded portion and the deep molded portion are formed at the same time. It is possible to suppress the load applied to the packaging material at the time of manufacturing.

The advancing / retreating mechanism may be composed of a spring.

The spring constant of the spring may be 3.6 N / mm or more and 20.4 N / mm or less.

A manufacturing method according to another aspect of the present invention is a housing for a power storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order. Is a method for manufacturing. The manufacturing method includes a step of sandwiching the packaging material between the female mold and the presser plate. The female mold has a recess. The holding plate has a hole formed at a position overlapping the recess in a plan view. The recess includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region. The manufacturing method includes a step of penetrating the hole and allowing the male mold to enter the recess, a step of locating the first portion of the male mold in the first concave region and sandwiching the packaging material between the first portion and the female mold, and a second. It further includes a step of locating the second portion of the male mold in the concave region and allowing the second portion to enter deeper into the recess than the first portion so that the packaging material is not sandwiched between the second portion and the female mold.

In this manufacturing method, in a state where the male mold has completely entered the first concave portion, the first portion of the male mold is located in the first concave region and the packaging material is sandwiched between the male mold and the female mold, so that the second male mold has a second portion. The portion is located in the second concave region and enters a position deeper in the first recess than the first portion so that the packaging material is not sandwiched between the female mold and the female mold. Therefore, according to this manufacturing method, since the depth of entry in the first recess differs between the first portion and the second portion, it is possible to manufacture an accommodating body having a complicated shape having different depths depending on the position. Further, according to this manufacturing method, since the second portion does not sandwich the packaging material with the female mold, for example, even if a foreign substance is present on the female mold, wrinkles are formed on the packaging material due to the foreign substance. The situation that occurs can be suppressed.

A container according to another aspect of the present invention is manufactured by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer and a thermosetting resin layer in this order by a manufacturing apparatus. It is a housing for a power storage device. The manufacturing apparatus includes a female mold, a holding plate, and a male mold. The female mold has a recess. The holding plate has a hole formed at a position overlapping the recess in a plan view. The male mold is configured to penetrate the hole and enter the recess. The packaging material is sandwiched between the female mold and the presser plate. The recess includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region. The male mold is located in the first concave region and sandwiches the packaging material with the female mold in the state where the entry into the concave portion is completed, and is located in the second concave region and is the first portion than the first portion. 1 Includes a second part that penetrates deep into the recess and does not sandwich the packaging material with the female mold.

According to the present invention, it is possible to provide a manufacturing apparatus or the like capable of manufacturing an accommodating body for a power storage device suitable for the circumstances of the product on which the power storage device is mounted.

It is a figure which shows the outline of the manufacturing apparatus according to Embodiment 1. It is a figure which shows the outline of the molding unit. It is a figure which shows the outline of the state which the female type was seen from below. FIG. 3 is a sectional view taken along line IV-IV of FIG. It is a figure which shows the outline of the state which the holding plate and the male form were seen from above. FIG. 5 is a sectional view taken along line VI-VI of FIG. It is a figure which shows the state which the male type does not enter a hole of a female type when a female type does not include a insertion piece. It is a figure which shows the state in which a male type is in the process of entering a hole of a female type when a female type does not include a insertion piece. It is a figure which shows the state which the male type has completed entry into the hole of a female type when the female type does not include a insertion piece. It is a figure which shows the state which a male type does not enter a hole of a female type. It is a figure which shows the state in which a male type is entering a hole of a female type. It is a figure which shows the state which the male type has completed entry into the female type hole. It is a figure which shows the molded article manufactured by a manufacturing apparatus. It is a figure which shows the outline of the state which the holding plate and the male mold were seen from above in Embodiment 2. FIG. FIG. 10 is a cross-sectional view taken along the line XI-XI of FIG. It is a figure which shows the state which the male type does not enter a hole of a female type in Embodiment 2. In the second embodiment, it is a figure which shows the state in which a male type is entering a hole of a female type. FIG. 2 is a diagram showing a state in which the male type has completed entry into the female type hole in the second embodiment. It is a figure which shows the outline of the state which the female mold was seen from below in Embodiment 3. It is a cross-sectional view of XIV-XIV of FIG. FIG. 3 is a diagram showing a state in which the male type does not enter the hole of the female type in the third embodiment. FIG. 3 is a diagram showing a state in which the male type is in the process of entering the hole of the female type in the third embodiment. FIG. 3 is a diagram showing a state in which the male type has completed entry into the female type hole in the third embodiment. It is the figure which looked at the female hole from the bottom. It is a figure which shows the shape of the molded article in the modification 1. It is a figure which shows the shape of the molded article in the modification 2. It is a figure which shows the shape of the molded article in the modification 3. It is a figure which shows the shape of the molded article in the modification 4. It is a figure which shows the shape of the molded article in the modification 5. It is a figure which shows the shape of the molded article in the modification 6. It is a figure which shows the shape of the molded article in the modification 7. It is a figure which shows the 1st arrangement example of the electrode tab in a power storage device. It is a figure which shows the 2nd arrangement example of the electrode tab in a power storage device. It is a figure which shows the 3rd arrangement example of the electrode tab in a power storage device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and the description thereof will not be repeated.

[1. Embodiment 1]
<1-1. Overview of manufacturing equipment>
FIG. 1 is a diagram showing an outline of a manufacturing apparatus 10 according to the first embodiment. The manufacturing apparatus 10 uses a method in which the packaging material 20 is unwound from the take-up body attached to the reel 30 described later, the packaging material 20 is molded by the molding unit 100 on the downstream side, and the packaging material 20 is cut in the width direction. For example, it is configured to manufacture an accommodating body for a power storage device. The directions indicated by the arrows UDLRFB (up / down / left / right / front / rear) in FIG. 1 are common to each drawing.

As shown in FIG. 1, the manufacturing apparatus 10 includes a reel 30, a transfer unit 40, servo mechanisms 200 and 300, and a molding unit 100.

The reel 30 is configured to feed out the sheet-shaped packaging material 20. The packaging material 20 is a so-called laminated film, and is composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order.

The base material layer contained in the packaging material 20 is a layer for imparting heat resistance to the packaging material 20 and suppressing the occurrence of pinholes that may occur during processing or distribution. The base material layer is composed of, for example, at least one layer of a stretched polyester resin layer and a stretched polyamide resin layer. For example, when the base material layer contains at least one layer of the stretched polyester resin layer and the stretched polyamide resin layer , the barrier layer can be protected during the molding process of the packaging material 20 and the breakage of the packaging material 20 can be suppressed. Further, from the viewpoint of increasing the tensile elongation of the packaging material 20, the stretched polyester resin layer is preferably a biaxially stretched polyester resin layer, and the stretched polyamide resin layer is preferably a biaxially stretched polyamide resin layer. Further, from the viewpoint of excellent piercing strength or impact strength, the stretched polyester resin layer is more preferably a biaxially stretched polyethylene terephthalate (PET) film, and the stretched polyamide resin layer is preferably a biaxially stretched nylon (ONy) film. More preferable. The base material layer may be composed of both a stretched polyester resin layer and a stretched polyamide resin layer.

Further, the barrier layer contained in the packaging material 20 is made of, for example, aluminum foil in terms of processability such as moisture resistance and ductility and cost. The aluminum foil preferably contains iron from the viewpoint of excellent pinhole resistance and ductility during molding. The iron content in the aluminum foil is preferably 0.5 to 5.0% by mass, more preferably 0.7 to 2.0% by mass. When the iron content is 0.5% by mass or more, excellent pinhole resistance and ductility of the packaging material 20 can be obtained. Further, when the iron content is 5.0% by mass or less, excellent flexibility of the packaging material 20 can be obtained.

The thickness of the barrier layer is preferably, for example, 30 to 60 μm, and more preferably 40 to 60 μm from the viewpoint of barrier property, pinhole resistance and molding processability. When the thickness of the barrier layer is 30 μm or more, it is difficult to break even if stress is applied by the molding process. When the thickness of the barrier layer is 60 μm or less, the increase in mass of the packaging material 20 can be reduced, and the decrease in weight energy density of the power storage device can be suppressed.

The thermosetting resin layer contained in the packaging material 20 is a layer that imparts sealing properties to the packaging material 20 by heat sealing. Examples of the heat-sealing resin layer include a resin film made of a polyolefin resin or an acid-modified polyolefin resin obtained by graft-modifying a polyolefin resin with an acid such as maleic anhydride.

The transport unit 40 is configured to transport the packaging material 20 from the upstream side to the downstream side of the manufacturing apparatus 10. Each of the servo mechanisms 200 and 300 is configured to control the drive of the molding unit 100. The molding unit 100 is configured to mold the packaging material 20 by receiving driving force from each of the servo mechanisms 200 and 300. When the molding by the molding unit 100 is completed, the molded product 50 (accommodating body) is completed.

<1-2. Molding unit configuration>
FIG. 2 is a diagram showing an outline of the molding unit 100. As shown in FIG. 2, the molding unit 100 includes a base 102, a female mold 110, a base 104, a plurality of air cylinders 132, a holding plate 130, a male mold 120, and a plurality of pillars 106. Includes.

A female mold 110 is attached below the base 102 (in the direction of arrow D). The base 102 is movable in the vertical direction with respect to each pillar 106. The base 102 moves in the vertical direction by the driving force supplied from the servo mechanism 200.

FIG. 3 is a diagram showing an outline of a state in which the female mold 110 is viewed from below. FIG. 4 is a sectional view taken along line IV-IV of FIG. As shown in FIGS. 3 and 4, the female mold 110 has a rectangular shape in a plan view, and includes a female mold main body 112 and a plurality (two) insert pieces 114. A hole H1 is formed on the lower surface of the female main body 112, and a plurality of insertion pieces 114 are detachably arranged in the hole H1.

Specifically, one insertion piece 114 is arranged at the end of the hole H1 in the direction of the arrow F, and the other insertion piece 114 is arranged at the end of the hole H1 in the direction of the arrow B. Further, each insert piece 114 is fixed to the female main body 112 by a fixing member such as a screw. The length of each insert piece 114 in the height direction (arrow UD direction) is shorter than the depth of the deepest position of the hole H1. As a result, in the hole H1, a first concave region T1 having a first depth (a region below the insertion piece 114) and a second concave region T2 having a second depth deeper than the first depth. (Area on the side of each insert piece 114) is formed.

A cutting blade (not shown) is provided on the downstream side (in the direction of arrow R) of the hole H1. In the female mold 110, the hole H1 only needs to be formed with a recess, and does not necessarily have to penetrate the hole H1. In the present invention, the "recess" does not simply mean a recess, but also includes a through hole. At the time of molding the packaging material 20, the base 102 (FIG. 2) is lowered, and the lower surface of the female mold 110 comes into contact with the upper surface (base material layer (outermost layer)) of the packaging material 20.

With reference to FIG. 2 again, a holding plate 130 is attached above the base 104 (in the direction of arrow U) via a plurality of air cylinders 132. The presser plate 130 can move in the vertical direction by the driving force supplied from the air cylinder 132. At the time of molding the packaging material 20, the pressing plate 130 is further pressed upward with the packaging material 20 sandwiched between the female mold 110 and the pressing plate 130. That is, at the time of molding the packaging material 20, the upper surface of the pressing plate 130 comes into contact with the lower surface of the packaging material 20 (thermosetting resin layer (innermost layer)).

FIG. 5 is a diagram showing an outline of a state in which the presser plate 130 and the male type 120 are viewed from above. As shown in FIG. 5, the presser plate 130 has a rectangular shape in a plan view, and a through hole H2 is formed on the upper surface of the presser plate 130. The position of the hole H2 in the molding unit 100 is a position that overlaps with the hole H1 (FIGS. 2 and 3) in a plan view. An air cylinder 132 is arranged below each of the four corners of the presser plate 130.

With reference to FIG. 2 again, the male mold 120 can move in the vertical direction through the hole H2 formed in the holding plate 130. The male type 120 moves in the vertical direction by the driving force supplied from the servo mechanism 300. As the male 120 moves upward, the male 120 enters the hole H1 formed in the female 110. The packaging material 20 is formed by the male mold 120 entering the hole H1 while the packaging material 20 is sandwiched between the female mold 110 and the holding plate 130, and the female mold 110 is formed on the downstream side of the hole H1. The packaging material 20 is cut in the width direction (arrow FB direction) by a cutting blade (not shown) provided in the (arrow R direction).

With reference to FIG. 5 again, the shape of the male 120 in plan view is rectangular and has long and short sides. The length of the long side is, for example, 150 mm or more, and the length of the short side is, for example, 50 mm or more. Further, a groove G1 for allowing air to escape during molding of the packaging material 20 is formed on the upper surface of the male mold 120.

FIG. 6 is a sectional view taken along line VI-VI of FIG. As shown in FIG. 6, the male type 120 has two types of portions having different lengths in the height direction (arrow UD direction). Specifically, the male type 120 has a first portion P1 (two places) having a length in the first height direction and a length in the second height direction longer than the length in the first height direction. It has a second portion P2 having a height.

One first portion P1 extends in the direction of arrow B from the end of the second portion P2 in the direction of arrow B, and the other first portion P1 extends in the direction of arrow F from the end of the second portion P2 in the direction of arrow F. There is. The first portion P1 and the second portion P2 are integrally formed, and the lower surfaces of the first portion P1 and the second portion P2 are flush with each other. That is, the second portion P2 extends upward from the first portion P1. When the male type 120 enters the hole H1 (FIGS. 2 and 3), the first portion P1 enters the first concave region T1 (FIG. 4) and the second portion P2 enters the second concave region T2.

<1-3. Reasons for placing pieces>
As described above, the manufacturing apparatus 10 is configured to manufacture an accommodating body (molded product 50) for a power storage device. In such an accommodating body, a molded portion for accommodating the battery element is formed. The shape of the molded portion may not be a rectangular parallelepiped shape, for example, depending on the circumstances of the product on which the power storage device is mounted.

For example, when the product on which the power storage device is mounted is a small electronic device, it is necessary to accommodate the power storage device in a limited space. Since the limited space is not necessarily a rectangular parallelepiped shape, if various shapes can be realized as the shape of the molded portion, it can contribute to the miniaturization of electronic devices.

Further, for example, a power storage device mounted on an electric vehicle is required to have a high volumetric energy density. Since the area occupied by the member accommodated in the power storage device is not necessarily a rectangular parallelepiped shape, the volumetric energy density of the power storage device can be further increased if various shapes can be realized as the shape of the molded portion.

Further, for example, it may be preferable that the shape of the molded portion is not a rectangular parallelepiped shape in relation to other parts mounted on the product. For example, molding of an accommodating body to secure a place for placing an electronic circuit (for example, an ECU (Electronic Control Unit)), a water cooling circuit for cooling a power storage device, or a heat radiation sheet for heat dissipation of the power storage device. It may be preferable that the shape of the portion is not a rectangular parallelepiped shape. In such a case, if various shapes can be realized as the shape of the molded portion, the internal space of the product can be utilized more effectively.

In the manufacturing apparatus 10 according to the first embodiment, the insert piece 114 is arranged in the female mold main body 112 in order to manufacture the molded product 50 in which the molded portion has two types of regions having different depths. First, what kind of molded product is manufactured when the insert piece 114 is not arranged in the female mold main body 112 will be described.

FIG. 7A is a diagram showing a state in which the male type 120 does not enter the hole (recess) of the female type 110X when the female type 110X does not include the insertion piece 114. As shown in FIG. 7A, the packaging material 20 is sandwiched between the pressing plate 130 and the female mold 110X.

FIG. 7B is a diagram showing a state in which the male type 120 is in the process of entering the hole of the female type 110X when the female type 110X does not include the insertion piece 114. As shown in FIG. 7B, when the male mold 120 starts to enter the hole of the female mold 110X, the molded portion starts to be molded in the packaging material 20.

FIG. 7C is a diagram showing a state in which the male type 120 has completely entered the hole of the female type 110X when the female type 110X does not include the insertion piece 114. As shown in FIG. 7C, when the male mold 120 has entered the hole of the female mold 110X, the molding of the molded portion is completed. In the molded portion molded by such a method, the stepped portion at the boundary between the first portion P1 (FIG. 6) of the male mold 120 and the second portion P2 of the male mold 120 is clearly formed on the packaging material 20. Not. That is, it is not possible to obtain a container having a desired shape by such a method.

Next, in the manufacturing apparatus 10 according to the first embodiment, what kind of molded product is manufactured when the female mold 110 includes the insert piece 114 will be described.

FIG. 8A is a diagram showing a state in which the male type 120 does not enter the hole H1 (FIGS. 2 and 3) of the female type 110. As shown in FIG. 8A, the packaging material 20 is sandwiched between the pressing plate 130 and the female mold 110.

FIG. 8B is a diagram showing a state in which the male type 120 is in the process of entering the hole H1 of the female type 110. As shown in FIG. 8B, when the male mold 120 starts to enter the hole H1 of the female mold 110, the molded portion starts to be molded in the packaging material 20.

FIG. 8C is a diagram showing a state in which the male type 120 has completed the entry into the hole H1 of the female type 110. As shown in FIG. 8C, when the male mold 120 has entered the hole H1 of the female mold 110, the molding of the molded portion is completed. In this state, the first portion P1 (FIG. 6) of the male mold 120 is located in the first concave region T1 (FIG. 4) in the hole H1 and sandwiches the packaging material 20 with the insertion piece 114. Further, the second portion P2 (FIG. 6) is located in the second concave region T2 (FIG. 4) in the hole H1 and enters a position deeper in the hole H1 than the first portion P1 and is between the female main body 112. The packaging material 20 is not sandwiched.

FIG. 9 is a diagram showing a molded product 50 manufactured by the manufacturing apparatus 10 according to the first embodiment. With reference to FIG. 9, the upper part shows a plan view of the molded product 50, and the lower part shows a side view of the molded product 50. As shown in FIG. 9, the molded product 50 includes a flange portion 53, a molded portion 51 that rises upward from the flange portion 53, and a molded portion 52 that rises further above the molded portion 51. That is, in the molded portion of the molded product 50 manufactured by the manufacturing apparatus 10 according to the first embodiment, the stage of the boundary between the first portion P1 (FIG. 6) of the male mold 120 and the second portion P2 of the male mold 120. A portion (a step portion at the boundary between the molded portion 51 and the molded portion 52) is clearly formed on the packaging material 20. That is, according to the manufacturing apparatus 10 according to the first embodiment, since the female mold 110 includes the insert piece 114, an accommodating body having a desired shape can be obtained.

<1-4. Features>
As described above, in the manufacturing apparatus 10 according to the first embodiment, the first portion P1 of the male mold 120 is in the first concave region T1 in a state where the male mold 120 has completely entered the hole H1 of the female mold 110. The packaging material 20 is sandwiched between the female mold 110 (insertion piece 114), and the second portion P2 of the male mold 120 is located in the second concave region T2 and is deeper than the first portion P1 in the hole H1. Do not enter and sandwich the packaging material 20 with the female mold 110. Therefore, according to the manufacturing apparatus 10, since the depth of entry in the hole H1 differs between the first portion P1 and the second portion P2, an accommodating body (storage device) having a complicated shape having different depths depending on the position is mounted. It is possible to manufacture an accommodating body for a power storage device that suits the circumstances of the product. Further, according to the manufacturing apparatus 10, since the second portion P2 does not sandwich the packaging material 20 with the female mold 110, for example, even if a foreign substance is present on the packaging material 20, the packaging material is caused by the foreign substance. It is possible to suppress the situation where wrinkles are formed on the top 20.

Further, in the manufacturing apparatus 10, the insert piece 114 is removable. Therefore, according to the manufacturing apparatus 10, by changing the shape of the insert piece 114, an accommodating body (molded product 50) having various shapes can be manufactured.

[2. Embodiment 2]
In the manufacturing apparatus 10 according to the first embodiment, the molding portion 51 and the molding portion 52 were molded substantially at the same time. However, when the molded portion 51 and the molded portion 52 are molded substantially at the same time, the load applied to the packaging material 20 is not necessarily small. In the manufacturing apparatus according to the second embodiment, the configuration of the male mold 120A is changed as compared with the first embodiment in order to make the molding timings of the molding section 51 and the molding section 52 different. Hereinafter, the points common to the first embodiment will not be repeated, and the points different from the first embodiment will be mainly described.

<2-1. Molding unit configuration>
FIG. 10 is a diagram showing an outline of a state in which the presser plate 130 and the male type 120A are viewed from above in the second embodiment. With reference to FIG. 10, the male type 120A can move in the vertical direction through the hole H2 formed in the holding plate 130.

FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. As shown in FIG. 11, the male type 120A includes a male type main body 121A, a plurality (two) movable portions 123A, and a plurality of springs 122A. The male body 121A has two types of portions having different lengths in the height direction (arrow UD direction). From the lower end of the portion having a long length in the height direction, a portion having a short length in the height direction extends in each of the arrow BF directions.

A movable portion 123A is attached to each of the portions of the male main body 121A having a short length in the height direction via a plurality of springs 122A. Since each movable portion 123A is attached to the male mold main body 121A via a spring 122A, it is possible to advance and retreat in the traveling direction of the male mold 120. The spring constant of each spring 122A is, for example, 3.6 N / mm or more and 20.4 N / mm or less.

<2-2. Operation>
FIG. 12A is a diagram showing a state in which the male type 120A does not enter the hole H1 (FIGS. 2 and 3) of the female type 110 in the second embodiment. FIG. 12B is a diagram showing a state in which the male type 120A is in the process of entering the hole H1 of the female type 110. FIG. 12C is a diagram showing a state in which the male type 120A has completed the entry into the hole H1 of the female type 110. Hereinafter, the operation of the manufacturing apparatus according to the second embodiment will be described with reference to FIGS. 12A-12C.

As shown in FIG. 12A, the packaging material 20 is sandwiched between the pressing plate 130 and the female mold 110.

As shown in FIG. 12B, when the male mold 120A starts to enter the hole H1 of the female mold 110, the molded portion starts to be molded in the packaging material 20. Then, the entry of each movable portion 123A into the first concave region T1 (FIG. 4) is completed, and the packaging material 20 is sandwiched between the movable portion 123A and the insertion piece 114. That is, at this stage, the molded portion 51 of the molded product 50 (FIG. 9) is molded.

As shown in FIG. 12C, when the male type 120A further enters the hole H1 from the state shown in FIG. 12B, the male type main body 121A enters to a deeper position of the hole H1 and each spring 122A contracts and is movable. The portion 123A recedes relative to the male body 121A. As a result, the molded portion 52 of the molded product 50 is molded. In this state, the movable portion 123A of the male type 120A is located in the first concave region T1 (FIG. 4) in the hole H1 and sandwiches the packaging material 20 with the insertion piece 114. Further, the male main body 121A is located in the second concave region T2 (FIG. 4) in the hole H1 and enters a position deeper in the hole H1 than the movable portion 123 to sandwich the packaging material 20 with the female main body 112. Not. As a result, the molded product 50 shown in FIG. 9 is manufactured.

<2-3. Features>
As described above, in the manufacturing apparatus according to the second embodiment, after the movable portion 123A sandwiches the packaging material 20 with the female mold 110 (insertion piece 114), the movable portion 123A is compared with the male mold main body 121A. The male body 121A enters the deeper position of the hole H1. That is, in this manufacturing apparatus, a shallow molded portion (molded portion 51 (FIG. 9)) in the accommodating body is formed when the movable portion 123A sandwiches the packaging material 20 with the female mold 110 (insert piece 114). When the male body 121A has entered the deeper position of the hole H1, the deep molded portion (molded portion 52) in the accommodating body is formed. Therefore, according to this manufacturing apparatus, since the shallow molded portion and the deep molded portion of the accommodating body are formed stepwise, the accommodating body is compared with the case where the shallow molded portion and the deep molded portion are formed at the same time. It is possible to suppress the load applied to the packaging material 20 at the time of manufacturing.

[3. Embodiment 3]
In the second embodiment, the male type 120A includes a spring 122A. However, it does not necessarily have to be male to include the spring. In the third embodiment, the female type 110B includes a spring. In the following, the points common to the first embodiment will not be repeated, and the points different from the first embodiment will be mainly described.

<3-1. Molding unit configuration>
FIG. 13 is a diagram showing an outline of a state in which the female mold 110B is viewed from below in the third embodiment. FIG. 14 is a cross-sectional view taken along the line XIV-XIV of FIG. As shown in FIGS. 13 and 14, the female mold 110B includes the female mold main body 112, the insert piece 114B, and the spring 116B.

One insert piece 114B is attached to the female body 112 via a spring 116B at the end of the hole H1B in the arrow F direction, and the other insert piece 114B is attached to the female body 112 via a spring 116B at the end of the hole H1B in the arrow B direction. It is attached to the female body 112. Further, the lower end of each insertion piece 114B (the end in the arrow D direction) is flush with the lower end of the female main body 112.

<3-2. Operation>
FIG. 15A is a diagram showing a state in which the male type 120 does not enter the hole H1B (FIG. 13) of the female type 110B in the third embodiment. FIG. 15B is a diagram showing a state in which the male type 120 is in the process of entering the hole H1B of the female type 110B. FIG. 15C is a diagram showing a state in which the male type 120 has completed the entry of the male type 120 into the hole H1B of the female type 110B. Hereinafter, the operation of the manufacturing apparatus according to the third embodiment will be described with reference to FIGS. 15A-15C.

As shown in FIG. 15A, the packaging material 20 is sandwiched between the pressing plate 130 and the female mold 110B.

As shown in FIG. 15B, when the male mold 120 starts to enter the hole H1B of the female mold 110B, the molding portion starts to be molded in the packaging material 20. Then, when the packaging material 20 is sandwiched between the first portion P1 (FIG. 6) and the insert piece 114B, the molding portion 52 (FIG. 9) is formed.

As shown in FIG. 15C, when the male type 120 further enters the hole H1B from the state shown in FIG. 15B, the male type 120 enters the hole H1B to a deeper position, and each spring 116B contracts and each insert. Piece 114B retreats. As a result, the molded portion 51 of the molded product 50 is molded. In this state, the first portion P1 of the male mold 120 is located at a position corresponding to the first concave region T1 (FIG. 4) in the hole H1B, and sandwiches the packaging material 20 with the insertion piece 114B. Further, the second portion P2 of the male mold 120 is located at a position corresponding to the second concave region T2 (FIG. 4) in the hole H1B and enters a position deeper in the hole H1B than the first portion P1 to enter the female mold main body 112. The packaging material 20 is not sandwiched between and. As a result, the molded product 50 shown in FIG. 9 is manufactured.

<3-3. Features>
As described above, in the manufacturing apparatus according to the third embodiment, the insert piece 114B retracts after the first portion P1 sandwiches the packaging material 20 with the female mold 110B (insertion piece 114B), and the first portion P1 and the second portion P2 enter deeper into the hole H1B. That is, in this manufacturing apparatus, when the first portion P1 sandwiches the packaging material 20 with the female mold 110B (insertion piece 114B), the deep molding portion (molding portion 52 (FIG. 9)) in the container is molded. Then, when the first portion P1 and the second portion P2 have entered the deeper position of the hole H1B, a shallow molded portion (molded portion 51) in the accommodating body is formed. Therefore, according to this manufacturing apparatus, since the shallow molded portion and the deep molded portion of the accommodating body are formed stepwise, the accommodating body is compared with the case where the shallow molded portion and the deep molded portion are simultaneously molded. It is possible to suppress the load applied to the packaging material at the time of manufacturing.

[4. Modification example]
Although the first and third embodiments have been described above, the present invention is not limited to the first and third embodiments, and various modifications can be made without departing from the spirit of the present invention. Hereinafter, a modified example will be described.

<4-1>
In the second embodiment, the movable portion 123A is attached to the male main body 121A via the spring 122A, and in the third embodiment, the insert piece 114B is attached to the female main body 112 via the spring 116B. However, these do not necessarily have to be springs. For example, it may be an elastic body such as rubber. That is, the movable portion 123A may be attached to the male main body 121A via an elastic body such as rubber, or the insert piece 114B may be attached to the female main body 112 via an elastic body such as rubber.

Further, for example, a mechanism including a servomotor and a ball screw may be provided between them. That is, the movable portion 123A may be attached to the male main body 121A via the mechanism, or the insert piece 114B may be attached to the female main body 112 via the mechanism. In this case, a program for driving the servomotor at a required timing is executed in the manufacturing apparatus.

<4-2>
Further, in the above-described first embodiment, the molded product 50 (FIG. 9) was manufactured. However, the molded product produced is not necessarily limited to the molded product 50. That is, the placement locations of the insertion pieces 114 and 114B are not limited to the above-described first and third embodiments. For example, by changing the arrangement of the insert pieces 114 and 114B, molded products having various shapes can be manufactured.

FIG. 16 is a view of the hole H1 of the female mold 110 as viewed from below. With reference to FIG. 16, for example, the insert pieces 114 are arranged in any or a plurality of regions S1-region S11, and molded products having various shapes are manufactured by using a male mold corresponding to the shape of the arranged insert pieces. be able to.

FIG. 17A is a diagram showing the shape of the molded product 50A in the first modification. As shown in FIG. 17A, in the molded product 50A, a step between the molded portion 51A and the molded portion 52A is formed on only one side. The molded product 50A is manufactured, for example, in a state where the insert pieces are arranged in the region S3.

FIG. 17B is a diagram showing the shape of the molded product 50B in the modified example 2. As shown in FIG. 17B, in the molded product 50B, a step between the molded portion 51B and the molded portion 52B is formed in an L shape. The molded product 50B is manufactured, for example, in a state where insert pieces are arranged in the regions S3 and S6.

FIG. 17C is a diagram showing the shape of the molded product 50C in the modified example 3. As shown in FIG. 17C, in the molded product 50C, a step between the molded portion 51C and the molded portion 52C is formed in a U shape. The molded product 50C is manufactured, for example, in a state where insert pieces are arranged in the regions S1, the region S3, and the region S5.

FIG. 17D is a diagram showing the shape of the molded product 50D in the modified example 4. As shown in FIG. 17D, in the molded product 50D, steps between the molded portion 51D and the molded portion 52D are formed on all four sides (entire circumference). The molded product 50D is manufactured, for example, in a state where insert pieces are arranged in the regions S1, the region S3, the region S5, and the region S6.

FIG. 17E is a diagram showing the shape of the molded product 50E in the modified example 5. As shown in FIG. 17E, in the molded product 50E, in addition to the step between the molded portion 51E and the molded portion 52E, a step between the molded portion 52E and the molded portion 54E is formed. The molded product 50E is manufactured, for example, in a state where insert pieces are arranged in the regions S1, the region S2, the region S3, and the region S4. In this case, the height of the insert pieces arranged in the areas S2 and S4 is shorter than the height of the insert pieces arranged in the areas S1 and S3.

FIG. 17F is a diagram showing the shape of the molded product 50F in the modified example 6. As shown in FIG. 17F, in the molded product 50F, the molded portion 51F does not extend over the entire side but is divided at one side. The molded product 50F is manufactured, for example, in a state where insert pieces are arranged in the area S7, the area S8, the area S9, and the area S10.

FIG. 17G is a diagram showing the shape of the molded product 50G in the modified example 7. As shown in FIG. 17G, in the molded product 50G, a recess is formed in the molded portion 52G. The molded product 50G is manufactured, for example, in a state where insert pieces are arranged in the regions S1, the region S3, and the region S11.

<4-3>
Further, when the power storage device is manufactured using the molded product 50 manufactured in the above-described first embodiment, the electrode tab may be arranged at any place.

FIG. 18A is a diagram showing a first arrangement example of the electrode tab 61A in the power storage device 60A. FIG. 18B is a diagram showing a second arrangement example of the electrode tab 61B in the power storage device 60B. FIG. 18C is a diagram showing a third arrangement example of the electrode tab 61C in the power storage device 60C.

As shown in FIG. 18A, each electrode tab 61A is arranged on each side of the power storage device 60A where a step (a step between the molded portion 51 and the molded portion 52) is formed. In this case, the positive electrode, the negative electrode and the separator are housed in the molding section 52, and the current collector foil connecting each of the positive electrode and the negative electrode and the electrode tab 61A is housed in the molding section 51. Since the current collector foil does not have a thickness as compared with the positive electrode, the negative electrode and the separator, such an arrangement can reduce the dead space in the housing.

Further, as shown in FIG. 18B, each electrode tab 61B may be provided on the same long side in the power storage device 60B, or as shown in FIG. 18C, each electrode tab 61C has a different length in the power storage device 60C. It may be provided on the side.

<4-4>
Further, the molded product 50 manufactured in the above-described first to third embodiments was used as an accommodating body for the power storage device. That is, the molded product 50 contains a battery element (including a capacitor, a capacitor, etc.) such as a lithium ion battery, and constitutes a laminated battery. A laminated battery in which a secondary battery such as a lithium ion battery is housed is an example of a power storage device, and either a primary battery or a secondary battery may be housed in the house. Preferably, a secondary battery is housed in the containment body. The type of secondary battery housed in the container is not particularly limited, and for example, a lithium ion battery, a lithium ion polymer battery, an all-solid battery, a lead storage battery, a nickel / hydrogen storage battery, a nickel / cadmium storage battery, and a nickel / iron. Examples thereof include storage batteries, nickel / zinc storage batteries, silver oxide / zinc storage batteries, metal air batteries, polyvalent cation batteries, capacitors, and capacitors.

10 Manufacturing equipment, 20 packaging materials, 30 reels, 40 transport units, 50, 50A-50G molded products, 51, 51A-51G, 52, 52A-52G, 54E molded parts, 53, 53A-53G flange parts, 60A-60C Power storage device, 61A-61C electrode tab, 100 molding unit, 102,104 base, 106 pillars, 110, 110X, 110B female type, 112 female type body, 114, 114B insert piece, 116B, 122A spring, 120, 120A male Mold, 121A male body, 123A movable part, 130 presser plate, 132 air cylinder, 200,300 servo mechanism, G1 groove, H1, H2 hole, P1 first part, P2 second part, S1-S11 area, T1 first 1 concave area, T2 2nd concave area.

Claims (8)

A manufacturing apparatus configured to manufacture an accommodating body for a power storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order. There,
A female mold with a first recess and
A holding plate having a hole formed at a position overlapping the first recess in a plan view,
It is provided with a male mold configured to penetrate the hole and enter the first recess.
The packaging material is sandwiched between the female mold and the holding plate, and is sandwiched between the female mold and the holding plate.
The first concave region includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region.
The male mold is located in the first concave region and is located in the first portion sandwiching the packaging material with the female mold and in the second concave region in a state where the entry into the first recess is completed. A manufacturing apparatus including a second portion that penetrates deeper into the first recess than the first portion and does not sandwich the packaging material with the female mold. The female type is
A female body with a second recess and
A piece that is detachably arranged in the second recess and has a length in the height direction shorter than the second depth is included.
The first concave region is formed between the opening end of the female mold and the insertion piece.
The manufacturing apparatus according to claim 1, wherein the second concave region is formed in a region of the second recess in which the insertion piece is not arranged. The manufacturing apparatus according to claim 1 or 2, wherein the first portion includes an advancing / retreating mechanism configured to advance / retreat in the direction of travel of the male type. The manufacturing apparatus according to claim 2, wherein the inserting piece includes an advancing / retreating mechanism configured to advance / retreat in the traveling direction of the male type. The manufacturing apparatus according to claim 3 or 4, wherein the advancing / retreating mechanism is composed of a spring. The manufacturing apparatus according to claim 5, wherein the spring constant of the spring is 3.6 N / mm or more and 20.4 N / mm or less. A manufacturing method for manufacturing an accommodating body for a power storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order.
Including the step of sandwiching the packaging material between the female mold and the presser plate,
The female mold has a recess and
The holding plate has a hole formed at a position overlapping the recess in a plan view.
The recess includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region.
The manufacturing method is
A step of penetrating the hole and allowing the male mold to enter the recess,
A step of positioning the first portion of the male mold in the first concave region and sandwiching the packaging material between the first portion and the female mold.
The second portion of the male mold is positioned in the second concave region, and the second portion is made to enter a position deeper than the first portion of the recess, and the packaging material is formed by the second portion and the female mold. A manufacturing method that further includes steps that do not pinch. An accommodating body for a power storage device manufactured by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer, and a thermosetting resin layer in this order by a manufacturing apparatus.
The manufacturing equipment
A female mold with a recess and
A holding plate having a hole formed at a position overlapping the recess in a plan view,
It is provided with a male mold configured to penetrate the hole and enter the recess.
The packaging material is sandwiched between the female mold and the holding plate, and is sandwiched between the female mold and the holding plate.
The recess includes a first concave region having a first depth and a second concave region having a second depth deeper than the first depth and adjacent to the first concave region.
The male mold is located in the first concave region, the first portion sandwiching the packaging material with the female mold, and the second concave region in a state where the entry into the recess is completed. An accommodating body including a second portion that penetrates deeper into the first recess than the first portion and does not sandwich the packaging material with the female mold.

Images