JP6680397B1 - Manufacturing apparatus, manufacturing method and container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing apparatus and the like capable of manufacturing a container for an electricity storage device, which suits the circumstances of a product in which the electricity storage device is mounted. A manufacturing apparatus is configured to manufacture a container for an electricity storage device by molding a packaging material 20. The manufacturing apparatus includes a female die 110, a holding plate 130, and a male die 120. The female mold has a first recess. The holding plate has a hole formed at a position overlapping the first recess in 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 holding plate. The first recess includes a first recessed region having a first depth and a second recessed region having a second depth deeper than the first depth and adjacent to the first recessed region. The male mold is located in the first recessed region and has the first part sandwiching the packaging material with the female mold in a state where the male mold is completely inserted into the first recessed part, and the male part is located in the second recessed region and is more than the first part. Also includes a second portion that penetrates deep into the first recess and does not sandwich the packaging material with the female mold. [Selection diagram] Figure 2

Description

  The present invention relates to a manufacturing apparatus, a manufacturing method and a container.

  WO 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 housing a battery element is formed. This recess is formed by disposing an exterior material on the opening of the die mold and inserting the punch mold into the opening (see Patent Document 1).

International Publication No. 2015/156327

  Depending on the circumstances of the product in which the electricity storage device is mounted, it may be preferable that the shape of the molded portion in the container for the electricity storage device is not a rectangular parallelepiped shape. However, in Patent Document 1 described above, only a method for forming a rectangular parallelepiped shaped portion is disclosed.

  The present invention has been made to solve such a problem, and an object thereof is to provide a manufacturing apparatus or the like that can manufacture a container for an electricity storage device that is suitable for the circumstances of a product in which the electricity storage device is mounted. Is to provide.

  A manufacturing apparatus according to an aspect of the present invention forms a container for an electricity storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer, and a heat-fusible resin layer in this order. Is configured to be manufactured. The manufacturing apparatus includes a female die, a holding plate, and a male die. The female mold has a first recess. The holding plate has a hole formed at a position overlapping the first recess in 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 holding plate. The first recess includes a first recessed region having a first depth and a second recessed region having a second depth deeper than the first depth and adjacent to the first recessed region. The male mold is located in the first recessed region and has the first part sandwiching the packaging material with the female mold in a state where the male mold is completely inserted into the first recessed part, and the male part is located in the second recessed region and is more than the first part. 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 the state where the male die has finished entering the first concave portion, the first portion of the male die is located in the first concave area and the packaging material is sandwiched between the male die and the female die. The portion is located in the second recessed region and enters the deeper portion of the first recessed portion than the first portion to prevent the packaging material from being sandwiched with the female mold. Therefore, according to this manufacturing apparatus, since the first part and the second part have different depths of penetration in the first recess, the container having a complicated shape having different depths depending on the position (the product in which the power storage device is mounted is It is possible to manufacture a container for an electricity storage device) that meets 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 matter is present on the female mold, the foreign matter causes wrinkles on the packaging material. The situation that occurs can be suppressed.

  The female die includes a female die main body having a second recess and a receiving piece that is removably disposed in the second recess and has a length in the height direction shorter than the second depth. May be formed between the opening end of the female mold and the insert piece, and the second recessed area may be formed in an area of the second recess in which the insert piece is not arranged.

  In this manufacturing apparatus, the insert piece can be attached and detached. Therefore, according to this manufacturing apparatus, it is possible to manufacture the containers of various shapes by changing the shape of the insert piece.

  The first portion 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 is relatively retracted as compared with the second part, and the second part is located deeper in the first recess. Approach to. That is, in this manufacturing apparatus, the shallow molding portion of 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 portion of the container is molded by. Therefore, according to this manufacturing apparatus, since the shallow forming portion and the deep forming portion of the container are formed in stages, the containing body is compared with the case where the shallow forming portion and the deep forming 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 advancing direction.

  In this manufacturing apparatus, after the first part sandwiches the packaging material with the female mold, the insert piece retracts, and the first part and the second part enter to a position deeper than the first recess. That is, in this manufacturing apparatus, the deep molding part of the container is molded at the stage where the first part sandwiches the packaging material with the female mold, and the first part and the second part are located deeper than the first recess. The shallow molding portion of the container is molded at the stage when the container has reached the point. Therefore, according to this manufacturing apparatus, since the shallow forming portion and the deep forming portion of the container are formed in stages, the containing body is compared with the case where the shallow forming portion and the deep forming 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 container for an electricity storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer and a heat-fusible 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 holding plate. The female mold has a recess. The holding plate has a hole formed at a position overlapping the concave portion in a plan view. The recess includes a first recessed region having a first depth and a second recessed region having a second depth deeper than the first depth and adjacent to the first recessed region. The manufacturing method includes a step of penetrating the hole to allow the male die to enter the concave portion, a step of positioning the male first portion in the first concave region and sandwiching the packaging material with the first portion and the female die, and The method further includes the step of locating the second male part in the recessed region and advancing the second part to a position deeper than the first part so that the packaging material is not sandwiched between the second part and the female mold.

  In this manufacturing method, in a state where the male die has finished entering the first concave portion, the first portion of the male die is located in the first concave area, and the packaging material is sandwiched between the male die and the female die. The portion is located in the second recessed region, and enters the deeper portion of the first recessed portion than the first portion, and does not sandwich the packaging material with the female mold. Therefore, according to this manufacturing method, since the first part and the second part have different depths of penetration in the first recess, it is possible to manufacture a container 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 matter is present on the female mold, the foreign matter causes wrinkles on the packaging material. 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 heat-fusible resin layer in this order by a manufacturing apparatus. It is a container for an electricity storage device. The manufacturing apparatus includes a female die, a holding plate, and a male die. The female mold has a recess. The holding plate has a hole formed at a position overlapping the concave portion 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 holding plate. The recess includes a first recessed region having a first depth and a second recessed region having a second depth deeper than the first depth and adjacent to the first recessed region. The male mold is located in the first concave region and has the first part sandwiching the packaging material with the female mold in a state where the male mold has completed the entry into the concave part, and the male part is located in the second concave region and is more than the first part. 1) a second part that penetrates to a deep position of 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 that can manufacture a container for an electricity storage device that is suitable for the circumstances of the product in which the electricity storage device is mounted.

FIG. 3 is a diagram showing an outline of a manufacturing apparatus according to the first embodiment. It is a figure which shows the outline of a molding unit. It is a figure which shows the outline of the state which looked at a female mold from below. FIG. 4 is a sectional view taken along line IV-IV of FIG. 3. It is a figure which shows the outline of the state which looked at a holding plate and a male mold from above. FIG. 6 is a VI-VI sectional view of FIG. 5. It is a figure which shows the state which a male mold has not penetrated into the hole of a female mold, when a female mold does not contain the insert piece. It is a figure which shows the state in the middle of the male mold | die entering the hole of a female mold | die, when a female mold | die does not include an insert piece. It is a figure which shows the state which the male mold's approach to the hole of a female mold was completed when a female mold does not contain a insert piece. It is a figure showing the state where a male type has not entered into a female type hole. It is a figure which shows the state in the middle of which the male type | mold is entering into the hole of a female type | mold. It is a figure which shows the state which the male type | mold entry into the female type | mold hole was completed. It is a figure which shows the molded product manufactured by the manufacturing apparatus. FIG. 9 is a diagram schematically showing a state in which a holding plate and a male mold are viewed from above in the second embodiment. FIG. 11 is a sectional view taken along line XI-XI in FIG. 10. FIG. 10 is a diagram showing a state in which a male mold has not entered a female hole in the second embodiment. In Embodiment 2, it is a figure which shows the state in the middle of which the male type | mold is entering into the female type | mold hole. In Embodiment 2, it is a figure which shows the state in which the male type | mold approached the female type | mold hole was completed. FIG. 16 is a diagram schematically showing a state where the female die is viewed from below in the third embodiment. FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 13. In Embodiment 3, it is a figure which shows the state which the male type has not entered into the female type hole. In Embodiment 3, it is a figure which shows the state in the middle of which the male type | mold is entering into the female type | mold hole. In Embodiment 3, it is a figure which shows the state in which the male type | mold entry into the female type | mold hole was completed. It is the figure which looked at the female hole from the lower part. FIG. 11 is a diagram showing a shape of a molded product in Modification 1. FIG. 11 is a diagram showing a shape of a molded product in Modification 2. FIG. 11 is a diagram showing the shape of a molded product in Modification 3; FIG. 11 is a diagram showing the shape of a molded product in Modification 4; FIG. 11 is a diagram showing the shape of a molded product in Modification 5. FIG. 11 is a diagram showing the shape of a molded product in Modification 6; FIG. 11 is a diagram showing the shape of a molded product in Modification 7. It is a figure which shows the 1st example of arrangement | positioning of the electrode tab in an electrical storage device. It is a figure which shows the 2nd example of arrangement | positioning of the electrode tab in an electrical storage device. It is a figure which shows the 3rd example of arrangement | positioning of the electrode tab in an electrical storage device.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that 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. Outline of manufacturing equipment>
FIG. 1 is a diagram schematically showing 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 a winding body attached to a reel 30 described later, the packaging material 20 is molded by a downstream molding unit 100, and the packaging material 20 is cut in the width direction. Thus, for example, it is configured to manufacture a container for an electricity storage device. Note that the directions indicated by the arrows UDLRFB (upper, lower, left, right, front, and 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 pay 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 heat-fusible resin layer in this order.

The base material layer included in the packaging material 20 is a layer for imparting heat resistance to the packaging material 20 and suppressing generation of pinholes that may occur during processing or distribution. The base material layer is configured to include at least one of a stretched polyester resin layer and a stretched polyamide resin layer, for example. For example, when the base material layer includes at least one 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. 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, the stretched polyester resin layer is more preferably a biaxially stretched polyethylene terephthalate (PET) film, and the stretched polyamide resin layer is a biaxially stretched nylon (ONy) film from the viewpoint of excellent puncture strength or impact strength. More preferable. The base material layer may include both layers of the stretched polyester resin layer and the stretched polyamide resin layer.

  The barrier layer included in the packaging material 20 is made of, for example, an aluminum foil in terms of workability such as moisture resistance and spreadability and cost. The aluminum foil preferably contains iron from the viewpoint of excellent pinhole resistance and spreadability during molding. The content of iron in the aluminum foil is preferably 0.5 to 5.0% by mass, and more preferably 0.7 to 2.0% by mass. When the iron content is 0.5% by mass or more, excellent pinhole resistance and spreadability of the packaging material 20 can be obtained. In addition, 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 properties, pinhole resistance, and moldability . When the barrier layer has a thickness of 30 μm or more, the barrier layer is unlikely to break even when stress is applied by molding . When the thickness of the barrier layer is 60 μm or less, an increase in mass of the packaging material 20 can be reduced and a decrease in weight energy density of the electricity storage device can be suppressed.

  The heat-fusible resin layer included in the packaging material 20 is a layer that imparts sealing property to the packaging material 20 by heat sealing. Examples of the heat-fusible 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 driving of the molding unit 100. The molding unit 100 is configured to mold the packaging material 20 by receiving a 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 (container) 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 die 110, a base 104, a plurality of air cylinders 132, a holding plate 130, a male die 120, and a plurality of columns 106. Is included.

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

  FIG. 3 is a diagram schematically showing a state where the female die 110 is viewed from below. FIG. 4 is a sectional view taken along line IV-IV in FIG. As shown in FIGS. 3 and 4, the female die 110 has a rectangular shape in plan view and includes a female die body 112 and a plurality (two) of insert pieces 114. A hole H1 is formed on the lower surface of the female main body 112, and a plurality of insert 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 arrow F direction, and the other insertion piece 114 is arranged at the end of the hole H1 in the arrow B direction. 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 recessed region T1 having a first depth (a region below the insert piece 114) and a second recessed region T2 having a second depth deeper than the first depth. (A region on the side of each insert piece 114) is formed.

  A cutting blade (not shown) is provided on the downstream side of the hole H1 (direction of arrow R). It should be noted that in the female mold 110, the hole H1 only needs to have a recess, and does not necessarily have to penetrate. In addition, in the present invention, the “recess” does not simply mean a dent, but is a concept that also includes a through hole. At the time of molding the packaging material 20, the base 102 (FIG. 2) descends, and the lower surface of the female die 110 contacts the upper surface (base material layer (outermost layer)) of the packaging material 20.

  Referring again to FIG. 2, a holding plate 130 is attached above the base 104 (in the direction of arrow U) via a plurality of air cylinders 132. The holding plate 130 can be moved in the vertical direction by the driving force supplied from the air cylinder 132. When the packaging material 20 is molded, the pressing plate 130 is further pressed upward while the packaging material 20 is sandwiched between the female die 110 and the pressing plate 130. That is, when the packaging material 20 is molded, the upper surface of the pressing plate 130 contacts the lower surface (the heat-fusible resin layer (innermost layer)) of the packaging material 20.

  FIG. 5 is a diagram showing an outline of a state where the pressing plate 130 and the male die 120 are viewed from above. As shown in FIG. 5, the holding plate 130 has a rectangular shape in a plan view, and a through hole H2 is formed in the upper surface of the holding plate 130. The position of the hole H2 in the molding unit 100 is a position overlapping the hole H1 (FIGS. 2 and 3) in a plan view. Air cylinders 132 are arranged below the four corners of the holding plate 130.

  Referring again to FIG. 2, the male die 120 penetrates the hole H2 formed in the holding plate 130 and is vertically movable. The male die 120 moves up and down by the driving force supplied from the servo mechanism 300. As the male die 120 moves upward, the male die 120 enters the hole H1 formed in the female die 110. While the packaging material 20 is sandwiched between the female die 110 and the pressing plate 130, the male die 120 enters the hole H1 to form the packaging material 20 and the downstream side of the hole H1 of the female die 110. The packaging material 20 is cut in the width direction (arrow FB direction) by a cutting blade (not shown) provided in (arrow R direction).

  Referring again to FIG. 5, the male die 120 has a rectangular shape in plan view, and has long sides 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, on the upper surface of the male die 120, a groove G1 for allowing air to escape when the packaging material 20 is formed is formed.

  FIG. 6 is a VI-VI sectional view of FIG. As shown in FIG. 6, the male die 120 has two types of portions having different lengths in the height direction (arrow UD direction). Specifically, the male mold 120 includes a first portion P1 (two locations) 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. And a second portion P2 having a thickness.

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

<1-3. Reasons for placing insert pieces>
As described above, the manufacturing apparatus 10 is configured to manufacture the container (molded product 50) for the electricity storage device. In such a container, a molded portion for housing the battery element is molded. Depending on the circumstances of the product in which the electricity storage device is mounted, for example, the shape of the molded portion may be preferably not a rectangular parallelepiped shape.

  For example, when the product in which the power storage device is mounted is a small electronic device, it is necessary to store 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 molding portion, it is possible to contribute to miniaturization of electronic devices.

  In addition, for example, a storage device mounted on an electric vehicle is required to have a high volume energy density. Since the region occupied by the member housed in the power storage device is not necessarily a rectangular parallelepiped shape, the volume 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, in some cases, it is preferable that the shape of the molding portion is not a rectangular parallelepiped because of the relationship with other components mounted on the product. For example, in order to secure a place for arranging an electronic circuit (for example, an ECU (Electronic Control Unit)), a water cooling circuit for cooling an electricity storage device, or a heat dissipation sheet for dissipating heat of the electricity storage device, a container is molded. It may be preferable that the shape of the part is not a rectangular parallelepiped. In such a case, if various shapes can be realized as the shape of the molding portion, the internal space of the product can be used more effectively.

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

  FIG. 7A is a diagram showing a state where the male die 120 has not entered the hole (recess) of the female die 110X when the female die 110X does not include the insert piece 114. As shown in FIG. 7A, the packaging material 20 is sandwiched by the holding plate 130 and the female mold 110X.

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

  FIG. 7C is a diagram showing a state in which the male die 120 has completely entered the hole of the female die 110X when the female die 110X does not include the insert piece 114. As shown in FIG. 7C, when the male die 120 is completely inserted into the hole of the female die 110X, the molding of the molding portion is completed. In the molded portion molded by such a method, the step portion at the boundary between the first portion P1 (FIG. 6) of the male die 120 and the second portion P2 of the male die 120 is clearly shaped on the packaging material 20. Not not. That is, with such a method, a container having a desired shape cannot be obtained.

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

  FIG. 8A is a diagram showing a state in which the male die 120 has not entered the hole H1 (FIGS. 2 and 3) of the female die 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 where the male die 120 is in the process of entering the hole H1 of the female die 110. As shown in FIG. 8B, when the male die 120 starts to enter the hole H1 of the female die 110, the molding portion of the packaging material 20 starts to be molded.

  FIG. 8C is a diagram showing a state where the male die 120 has completely entered the hole H1 of the female die 110. As shown in FIG. 8C, when the male die 120 is completely inserted into the hole H1 of the female die 110, the molding of the molding portion is completed. In this state, the first portion P1 (FIG. 6) of the male die 120 is located in the first recessed region T1 (FIG. 4) in the hole H1 and sandwiches the packaging material 20 with the insertion piece 114. In addition, the second portion P2 (FIG. 6) is located in the second recessed region T2 (FIG. 4) in the hole H1 and enters a position deeper in the hole H1 than the first portion P1 to form a gap with the female 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. Referring 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 bulges upward from the flange portion 53, and a molded portion 52 that bulges further above the molded portion 51. That is, in the molding part of the molded product 50 manufactured by the manufacturing apparatus 10 according to the first embodiment, the step at the boundary between the first portion P1 (FIG. 6) of the male die 120 and the second portion P2 of the male die 120. The portion (the stepped portion at the boundary between the molding portion 51 and the molding portion 52) is clearly shaped 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 insertion piece 114, it is possible to obtain a container having a desired shape.

<1-4. Features>
As described above, in the manufacturing apparatus 10 according to the first embodiment, the first portion P1 of the male die 120 is located in the first concave region T1 in a state where the male die 120 has completely entered the hole H1 of the female die 110. The packaging material 20 is sandwiched between the male die 120 and the female die 110 (the insert piece 114), and the second portion P2 of the male die 120 is located in the second recessed region T2 and the hole H1 is deeper than the first portion P1. The packaging material 20 is not sandwiched between it and the female mold 110. Therefore, according to the manufacturing apparatus 10, since the first portion P1 and the second portion P2 have different depths of penetration in the hole H1, the depth of the accommodation body having a complicated shape (the power storage device is mounted is different. It is possible to manufacture a container for an electricity storage device) that is suitable for 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 die 110, for example, even if a foreign matter exists on the packaging material 20, the packaging material 20 is caused by the foreign matter. It is possible to suppress the occurrence of wrinkles on the 20.

  Further, in the manufacturing apparatus 10, the insert piece 114 can be attached and detached. Therefore, according to the manufacturing apparatus 10, by changing the shape of the insert piece 114, it is possible to manufacture the container (molded product 50) having various shapes.

[2. Embodiment 2]
In manufacturing apparatus 10 according to the first embodiment, molding portion 51 and molding portion 52 are molded substantially at the same time. However, when the molding part 51 and the molding part 52 are molded at substantially 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 male mold 120A is changed as compared with the first embodiment in order to make the molding timings of molding portion 51 and molding portion 52 different from each other. Hereinafter, the description of 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 schematically showing a state in which the holding plate 130 and the male die 120A are viewed from above in the second embodiment. With reference to FIG. 10, the male die 120A penetrates the hole H2 formed in the holding plate 130 and is vertically movable.

  11 is a sectional view taken along line XI-XI of FIG. As shown in FIG. 11, the male die 120A includes a male body 121A, a plurality (two) of movable portions 123A, and a plurality of springs 122A. The male main 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 part 123A is attached to the male main body 121A via the spring 122A, it can be moved back and forth in the moving 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 where the male die 120A has not entered the hole H1 (FIGS. 2 and 3) of the female die 110 in the second embodiment. FIG. 12B is a diagram showing a state where the male die 120A is in the process of entering the hole H1 of the female die 110. FIG. 12C is a diagram showing a state in which the male die 120A has completely entered the hole H1 of the female die 110. The operation of the manufacturing apparatus according to the second embodiment will be described below 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 die 120A starts to enter the hole H1 of the female die 110, the molding portion of the packaging material 20 starts to be molded. 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 by the movable portion 123A and the insert piece 114. That is, at this stage, the molded part 51 of the molded product 50 (FIG. 9) is molded.

  As shown in FIG. 12C, when the male die 120A further enters into the hole H1 from the state shown in FIG. 12B, the male body 121A enters further into the hole H1 and each spring 122A contracts and moves. The part 123A retracts relatively to the male main body 121A. As a result, the molding part 52 of the molded product 50 is molded. In this state, the movable portion 123A of the male die 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 recessed region T2 (FIG. 4) in the hole H1, enters the deeper position of the hole H1 than the movable portion 123, and sandwiches the packaging material 20 with the female main body 112. Not at all. 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 die 110 (the insertion piece 114), the movable portion 123A is compared with the male body 121A. Relative to each other, and the male main body 121A enters a deeper position of the hole H1. That is, in this manufacturing apparatus, the shallow molding portion (molding portion 51 (FIG. 9)) of the container is molded at the stage when the movable portion 123A sandwiches the packaging material 20 with the female die 110 (inserting piece 114). The deep molding portion (molding portion 52) of the container is molded at the stage where the male mold body 121A has entered the deeper position of the hole H1. Therefore, according to this manufacturing apparatus, since the shallow forming portion and the deep forming portion of the container are formed in stages, the containing body is compared with the case where the shallow forming portion and the deep forming 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. Third Embodiment]
In the second embodiment, the male die 120A includes the spring 122A. However, the inclusion of the spring does not necessarily have to be male. In the third embodiment, the female die 110B includes a spring. Also in the following, the description of 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 schematically showing a state where the female die 110B is viewed from below in the third embodiment. 14 is a sectional view taken along line XIV-XIV of FIG. As shown in FIGS. 13 and 14, the female die 110B includes a female die body 112, a receiving piece 114B, and a 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 at the end of the hole H1B in the arrow B direction via the spring 116B. It is attached to the female main body 112. Further, the lower end (the end portion in the direction of arrow D) of each insert piece 114B is flush with the lower end of the female main body 112.

<3-2. Operation>
FIG. 15A is a diagram showing a state where the male die 120 has not entered the hole H1B (FIG. 13) of the female die 110B in the third embodiment. FIG. 15B is a diagram showing a state where the male die 120 is in the process of entering the hole H1B of the female die 110B. FIG. 15C is a diagram showing a state where the male die 120 has completely entered the hole H1B of the female die 110B. The operation of the manufacturing apparatus according to the third embodiment will be described below with reference to FIGS. 15A to 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 die 120 starts to enter the hole H1B of the female die 110B, the molding portion of the packaging material 20 starts to be molded. Then, the molding portion 52 (FIG. 9) is molded when the packaging material 20 is sandwiched between each first portion P1 (FIG. 6) and the insertion piece 114B.

  As shown in FIG. 15C, when the male die 120 further enters the hole H1B from the state shown in FIG. 15B, the male die 120 enters a deeper position of the hole H1B, and each spring 116B contracts to cause insertion. The piece 114B moves backward. As a result, the molding portion 51 of the molded product 50 is molded. In this state, the first portion P1 of the male die 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 insert piece 114B. In addition, the second portion P2 of the male die 120 is located at a position corresponding to the second recessed region T2 (FIG. 4) in the hole H1B, and enters the deeper portion of the hole H1B than the first portion P1 and the female 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, after the packaging material 20 is sandwiched between the first portion P1 and the female die 110B (the insertion piece 114B), the insertion piece 114B is retracted, and the first portion P1 and the second portion P2 enter into a deeper position of the hole H1B. That is, in this manufacturing apparatus, the deep molding portion (molding portion 52 (FIG. 9)) of the container is molded at the stage when the packaging material 20 is sandwiched between the first portion P1 and the female die 110B (inserting piece 114B). Then, the shallow molding portion (molding portion 51) of the container is molded at the stage where the first portion P1 and the second portion P2 have reached the deeper position of the hole H1B. Therefore, according to this manufacturing apparatus, since the shallow forming portion and the deep forming portion of the container are formed in stages, the containing body is compared with the case where the shallow forming portion and the deep forming portion are formed at the same time. It is possible to suppress the load applied to the packaging material at the time of manufacturing.

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

<4-1>
In the second embodiment, the movable part 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 need not necessarily 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 insertion 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 servo motor and a ball screw may be provided between them. That is, the movable portion 123A may be attached to the male die body 121A via the mechanism, or the insert piece 114B may be attached to the female die body 112 via the mechanism. In this case, the program for driving the servo motor at the required timing is executed in the manufacturing apparatus.

<4-2>
In addition, in the above-described first to third embodiments, the molded product 50 (Fig. 9) is manufactured. However, the manufactured molded product is not necessarily limited to the molded product 50. That is, the location of the insert pieces 114 and 114B is not limited to that in the above-described first to third embodiments. For example, molded articles having various shapes can be manufactured by changing the arrangement of the insert pieces 114 and 114B.

  FIG. 16 is a view of the hole H1 of the female die 110 as viewed from below. With reference to FIG. 16, for example, the insert pieces 114 are arranged in any one or a plurality of the areas S1 to S11, and a male mold corresponding to the shape of the arranged insert pieces is used to manufacture molded articles of various shapes. be able to.

  FIG. 17A is a diagram showing the shape of a molded product 50A according to Modification 1. As shown in FIG. 17A, in the molded product 50A, the 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 a molded product 50B according to Modification 2. As shown in FIG. 17B, in the molded product 50B, the 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, with the insert pieces arranged in the regions S3 and S6.

  FIG. 17C is a diagram showing the shape of a molded product 50C according to Modification 3. As shown in FIG. 17C, in the molded product 50C, the 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, S3, and S5.

  FIG. 17D is a diagram showing the shape of a molded product 50D according to Modification 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 four sides (entire circumference). The molded product 50D is manufactured, for example, with the insert pieces arranged in the regions S1, S3, S5, and S6.

  FIG. 17E is a diagram showing the shape of a molded product 50E according to Modification 5. As shown in FIG. 17E, in the molded product 50E, in addition to the step between the molding portion 51E and the molding portion 52E, a step between the molding portion 52E and the molding portion 54E is formed. The molded product 50E is manufactured, for example, in a state where insert pieces are arranged in the regions S1, S2, S3, and 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 a molded product 50F according to Modification 6. As shown in FIG. 17F, in the molded product 50F, the molding portion 51F does not extend over the entire one side and is divided at the one side. The molded product 50F is manufactured, for example, with the insert pieces arranged in the regions S7, S8, S9, and S10.

  FIG. 17G is a diagram showing the shape of a molded product 50G in Modification 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, S3, and S11.

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

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

  As shown in FIG. 18A, each electrode tab 61A is arranged on each side of the electricity storage device 60A where a step (a step between the molding portion 51 and the molding portion 52) is formed. In this case, the positive electrode, the negative electrode, and the separator are housed in the molding portion 52, and the current collector foils that connect the positive electrode and the negative electrode to the electrode tab 61A are housed in the molding portion 51. Since the current collector foil has no thickness as compared with the positive electrode, the negative electrode, and the separator, such an arrangement can reduce the dead space in the container.

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

<4-4>
Further, the molded product 50 manufactured in the above-mentioned first to third embodiments is used as a container for an electricity storage device. That is, the molded article 50 accommodates battery elements (including capacitors, capacitors, etc.) such as a lithium-ion battery to form a laminated battery. A laminated battery containing a secondary battery such as a lithium-ion battery is an example of an electricity storage device, and either a primary battery or a secondary battery may be housed in the housing. Preferably, the secondary battery is housed in the housing. The type of the secondary battery housed in the housing is not particularly limited, and examples thereof include a lithium-ion battery, a lithium-ion polymer battery, an all-solid-state battery, a lead storage battery, a nickel-hydrogen storage battery, a nickel-cadmium storage battery, and a nickel-iron battery. Examples 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 Conveying Units, 50, 50A-50G Molded Products, 51, 51A-51G, 52, 52A-52G, 54E Molded Parts, 53, 53A-53G Flange Parts, 60A-60C Electric storage device, 61A-61C electrode tab, 100 molding unit, 102, 104 base, 106 columns, 110, 110X, 110B female mold, 112 female body, 114, 114B insert piece, 116B, 122A spring, 120, 120A male Mold, 121A male main body, 123A movable part, 130 retainer plate, 132 air cylinder, 200,300 servo mechanism, G1 groove, H1, H2 hole, P1 first part, P2 second part, S1-S11 region, T1 second 1 concave area, T2 2nd concave area.

Claims (6)

A manufacturing apparatus configured to manufacture a container for an electricity storage device by molding a packaging material composed of a laminate having at least a base material layer, a barrier layer and a heat-fusible resin layer in this order. There
A female mold having a first recess,
A pressing plate having a hole formed at a position overlapping the first recess in plan view,
A male mold configured to penetrate the hole and enter the first recess,
The packaging material is sandwiched between the female mold and the pressing plate,
The first recess includes a first recessed region having a first depth and a second recessed region having a second depth deeper than the first depth and adjacent to the first recessed region,
The male mold is located in the first recessed region and is located in the second recessed region and a first portion which is located in the first recessed region and sandwiches the packaging material between the male mold and the female mold in a state in which the male mold is completely entered. look including a second portion not to pinch the packaging material between the female enters even the deep position in the first recess from the first portion as well as,
The female mold is
A female body having a second recess,
A detachable piece that is removably disposed in the second recess and has a length in the height direction shorter than the second depth;
The first recessed region is formed between the female opening end and the insertion piece,
The manufacturing apparatus , wherein the second recessed region is formed in a region of the second recessed portion where the insert piece is not arranged . The manufacturing apparatus according to claim 1, wherein the first portion includes an advancing / retreating mechanism configured to advance / retreat in the moving direction of the male die. The manufacturing apparatus according to claim 1 , wherein the insert piece includes an advancing / retreating mechanism configured to advance / retreat in the moving direction of the male die. The reciprocating mechanism is constituted by a spring manufacturing apparatus according to claim 2 or claim 3. The manufacturing apparatus according to claim 4 , wherein the spring constant of the spring is not less than 3.6 N / mm and not more than 20.4 N / mm. At least a base material layer, a barrier layer and a heat-fusible resin layer is a manufacturing method for manufacturing a container for an electricity storage device by molding a packaging material composed of a laminate having this order,
Including a step of sandwiching the packaging material by a female mold and a holding plate,
The female mold has a first recess,
The pressing plate has a hole formed at a position overlapping the first recess in plan view,
The first recess includes a first recessed region having a first depth and a second recessed region having a second depth deeper than the first depth and adjacent to the first recessed region,
The manufacturing method,
Advancing a male mold through the hole into the first recess;
Positioning the male first portion in the first recessed region and sandwiching the packaging material between the first portion and the female die;
The second portion of the male die is located in the second recessed region, the second portion is advanced to a position deeper in the first recess than the first portion, and the second portion and the female die are used to further look at including a step that does not pinch the packaging material,
The female mold is
A female body having a second recess,
A detachable piece that is removably disposed in the second recess and has a length in the height direction shorter than the second depth;
The first recessed region is formed between the female opening end and the insertion piece,
The manufacturing method , wherein the second recessed region is formed in a region of the second recessed portion where the insert piece is not arranged .