JP2013230870A - Tab lead packaging container and tab lead packaging product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tab lead packaging container capable of stably housing a plurality of tab leads stacked in the same direction.SOLUTION: Each of tab leads 10 is formed of an insulating resin film 12 fixed to longitudinal one part of a conductive tab lead body 11. On an upper surface 3a of a container body 2 of a container 1, a housing concave part 5 is formed which houses the plurality of tab leads 10 from the upper side, while being stacked in the same direction. The planar shape of an opening 5c of the housing concave part 5 parallel to the upper surface 3a of the container body 2 is formed in a shape corresponding to the planar shape of the tab lead 10. The housing concave part 5 has a bottom surface part 6 to be brought into contact with the lowest tab lead 10B of the plurality of tab leads 10 housed in the housing concave part 5. The bottom surface part 6 is inclined with respect to the upper surface 3a of the container body 2.

Description

  The present invention relates to a packaging container for accommodating a tab lead provided with an insulating resin film and a tab lead packaged product used for an electrochemical device (eg, lithium ion secondary battery, capacitor) and the like.

  As an electrochemical device, for example, a lithium ion secondary battery includes a battery element including a laminate of a positive electrode current collector, a negative electrode current collector, and a separator as an electrochemical element. The battery element is housed in an exterior body formed of a laminate film, and the opening edges corresponding to each other of the exterior body are sealed together by heat sealing to be enclosed in the exterior body.

  The tab lead on the positive electrode side or the negative electrode side in the lithium ion secondary battery includes a plate-like (including foil) tab lead body having conductivity. In a part of the length direction of the tab lead body, a strip-shaped insulating resin film for securing electrical insulation between the tab lead body and the exterior body extends in the width direction of the tab lead body and the width direction of the tab lead body. The both end portions of the insulating resin film are fixed to both sides of the tab lead main body in the width direction by welding or the like (see Patent Documents 1 to 7).

  Conventionally, this type of battery has been mainly used in portable devices such as mobile phones, but in recent years, it has also been used as a storage battery for electric vehicles (including hybrid vehicles).

  In a battery used in a portable device, the tab lead is packaged in a reel-like form in which the tab lead strip is fixed to a tape-shaped tab lead body with a plurality of insulating resin films fixed at predetermined intervals in the length direction. Have been stored and transported. Then, a tab lead strip wound in a reel shape is opened at a battery manufacturing site and the like, and a plurality of tab leads are collected from the tab lead strip by cutting the strip into strips having a predetermined length.

  In a battery used for an electric vehicle, the amount of current that flows during charging or discharging is increased, so that the thickness of the tab lead body of the tab lead is increased. For this reason, it is difficult to store and transport the tab lead strips wound in a reel shape. Therefore, in general, a plurality of tab leads obtained by cutting into strips in advance are stacked and stored and transported.

Japanese Patent Laid-Open No. 10-302756 JP 2010-165481 A JP 2010-170979 A JP 2010-245000 A JP 2006-202577 A Japanese Patent No. 3505905 JP 2011-78661 A

  Here, in order to facilitate the setting work when setting each tab lead to the battery assembly device after storage and transportation, storage and transportation are performed with a plurality of tab leads stacked in the same direction. Is desirable. However, the fixing position of the insulating resin film fixed to the tab lead body of each tab lead is not necessarily limited to the middle position in the length direction of the tab lead body, and is not limited to the middle position in the length direction of the tab lead body. In many cases, the position is shifted to one end side. Therefore, when a plurality of tab leads are stacked in the same direction, the insulating resin films adjacent to each other are in contact with each other, and the other ends of the tab lead bodies adjacent to each other are in contact with each other. When viewed from the side, the tab lead main body is stacked so that the opposite end side (that is, one end side) of the tab lead main body has a fan shape extending in the vertical direction. Therefore, a plurality of tab leads stacked during storage and transportation are likely to collapse. If the tab lead collapses, the tab lead may be deformed or damaged. Further, when the tab lead is set in the battery assembling apparatus, it is necessary to perform a troublesome operation of reloading the tab tab collapsed.

  The present invention has been made in view of the above-described technical background, and an object of the present invention is to provide a tab lead packing container that can stably store a plurality of tab leads stacked in the same direction, and a plurality of tab leads in the container. It is to provide a tab lead packaged product in which tab leads are packed.

  The present invention provides the following means.

[1] The insulating resin film extends in the width direction of the tab lead body on a part of the length direction of the tab lead body having conductivity, and both ends of the insulating resin film extend from both side edges in the width direction of the tab lead body. A packaging container for accommodating a plurality of tab leads fixed in a protruding state on both sides in the direction,
On the upper surface of the container body, there is formed an accommodation recess that accommodates a plurality of tab leads stacked from above in the same direction, from above.
The planar shape of the opening of the housing recess parallel to the upper surface of the container body is formed into a shape corresponding to the planar shape of the tab lead,
The housing recess has a bottom surface portion with which the lowest tab lead contacts among the plurality of tab leads housed in the housing recess, and the bottom surface portion is inclined with respect to the upper surface of the container body. Packing container.

  [2] The bottom surface portion of the housing recess is positioned with respect to the top surface of the container body such that the top surface of the tab lead body of the uppermost tab lead among the plurality of tab leads housed in the housing recess is substantially parallel to the top surface of the container body. 2. The tab lead packing container according to the preceding item 1, which is inclined.

  [3] On the upper surface of the container main body, an extraction operation concave portion for taking out a plurality of tab leads accommodated in the accommodating concave portion is formed to open to the upper surface of the container main body and the inner peripheral surface of the accommodating concave portion. The packaging container for tab leads according to the preceding item 1 or 2.

  [4] On the upper surface of the container main body, an extraction operation groove portion for extracting a plurality of tab leads accommodated in the accommodating recess passes from the outer peripheral side surface of the container main body through the upper end portion of the bottom surface portion of the accommodating recess, and the bottom surface portion. 4. The tab lead packaging container according to any one of the preceding items 1 to 3, which is formed to extend to at least an intermediate part of the above.

[5] A plurality of receiving recesses are formed side by side in the length direction of the receiving recesses on the upper surface of the container body,
On the upper surface of the container main body, an extraction operation groove for taking out a plurality of tab leads accommodated in the accommodating recesses is formed on the bottom surface of each receiving recess arranged in the length direction of the accommodating recess from the outer peripheral side surface of the container main body. 5. The tab lead packaging container according to any one of the preceding items 1 to 4, wherein the container is formed so as to sequentially pass through the upper end portion, the intermediate portion, and the lower end portion and to extend in the direction in which the plurality of receiving recesses are arranged.

  [6] The tab lead packaging container according to any one of the preceding items 1 to 5, wherein an inclination angle of the bottom surface of the housing recess with respect to the top surface of the container body is set in a range of 5 ° to 40 °.

  [7] The tab lead packaging container according to item 6 above, wherein the housing recess is housed from above in a state where 10 to 100 tab leads are stacked in the same direction as a plurality of tab leads.

[8] The insulating resin film is fixed to a position shifted to one end side with respect to an intermediate position in the length direction of the tab lead body.
The tab lead packaging container according to any one of the preceding items 1 to 7, wherein the plurality of tab leads are stacked so as to form a fan shape in which one end side extends in the vertical direction with the other end of the tab lead body as a center in a side view.

  [9] The tab lead packaging container according to any one of items 1 to 8, wherein the tab lead is used for an electrochemical device.

  [10] A tab lead packaged product in which a plurality of tab leads are accommodated in the accommodating recesses of the container according to any one of the preceding items 1 to 9 while being stacked in the same direction.

  The present invention has the following effects. In the following, a stack formed by stacking a plurality of tab leads is referred to as a “tab lead stack”.

  According to the container of the preceding item [1], the plurality of tab leads are accommodated in the accommodating recess from above in a state where they are stacked in the same direction. At this time, since the planar shape of the opening of the accommodating recess is parallel to the upper surface of the container body, the shape corresponding to the planar shape of the tab lead is formed, so that the plurality of tab leads are accommodated in the accommodating recess while being stacked. Therefore, the tab lead can be accommodated easily.

  Furthermore, the housing recess has a bottom surface portion with which the lowest tab lead contacts among the plurality of tab leads housed in the housing recess, and the bottom surface portion is inclined with respect to the top surface of the container body. Therefore, when a plurality of tab leads are stacked and stored in the receiving recess, the lowermost tab lead of these tab leads contacts the bottom surface of the receiving recess and the tab lead main body that extends in the vertical direction in the tab lead stack These tab leads can be accommodated so that one end side thereof does not protrude above the position of the upper surface of the container body, whereby a plurality of tab leads can be accommodated stably. Furthermore, the depth of the housing recess can be reduced compared to the housing recess in which the bottom surface portion is formed in parallel with the top surface of the container body, thereby making it possible to perform the tab lead housing operation more easily. The tab lead can be taken out easily.

  Of course, since the plurality of tab leads are stacked in the same direction and stored in the storage recess, the plurality of tab leads taken out from the storage recess after storage, transportation, etc. are aligned in the same direction. Therefore, when setting each tab lead to a predetermined assembling apparatus (for example, an assembling apparatus for electrochemical devices), the setting operation can be easily performed.

  According to the container of [2], the bottom surface portion of the housing recess is arranged such that the upper surface of the tab lead body of the uppermost tab lead among the plurality of tab leads housed in the housing recess is substantially parallel to the top surface of the container body. Inclined with respect to the upper surface of the container body. Thereby, a plurality of tab leads can be reliably and stably accommodated.

  According to the container of [3], the tab lead can be taken out more easily by inserting the take-out member and the like into the take-out operation recess when taking out a plurality of tab leads accommodated in the accommodation recess. .

  According to the container of [4], the take-out operation groove extends from the outer peripheral side surface of the container body. Therefore, when a plurality of tab leads are taken out, the take-out member or the like is inserted into the groove portion from the outside of the outer peripheral side surface of the container body, whereby the insertion operation into the groove portion such as the take-out member can be easily performed. Moreover, since the groove portion is formed so as to pass through the upper end portion of the bottom surface portion of the housing recess and extend to at least the middle portion of the bottom surface portion, the middle portion of the plurality of tab leads can be formed by the take-out member inserted in this way. By picking in the thickness direction, a plurality of tab leads can be picked up stably from the housing recess. Therefore, the tab lead can be taken out more easily.

  According to the container of [5], for the same reason as in [4], it is possible to easily perform the operation of inserting the take-out member or the like into the groove, and to pick up a plurality of tab leads stably from the housing recess. be able to.

  Moreover, the groove extends in the direction in which the plurality of receiving recesses are arranged so as to sequentially pass through the upper end portion, the intermediate portion, and the lower end portion of the bottom portion of each receiving recess portion. Therefore, a plurality of tab leads accommodated in the respective accommodating recesses can be sequentially taken out by a takeout member inserted into the groove. Therefore, the tab lead can be taken out even more easily.

  According to the container of the preceding item [6], the inclination angle of the bottom surface portion of the accommodating recess with respect to the upper surface of the container body is set in the range of 5 ° to 40 °, so that the tab lead accommodation workability and the removal workability are improved. Can be planned.

  According to the container of [7], the accommodating recess is accommodated from above in a state in which 10 to 100 tab leads are stacked in the same direction as a plurality of tab leads. Thus, it is possible to reliably improve the workability and the workability of taking out.

  In the preceding item [8], the insulating resin film is fixed to a position shifted to one end side with respect to the intermediate position in the length direction of the tab lead body, and the plurality of tab leads are arranged in the side view in addition to the tab lead body. It is stacked so that one end side extends in the vertical direction centering on the end. Even in the case of a plurality of tab leads stacked in this manner, according to the container described in [8], the tab lead can be stored and taken out easily and reliably.

  According to the container of the preceding item [9], it is possible to easily perform the storing operation and the extracting operation for a plurality of tab leads used in the electrochemical device.

  According to the tab lead package of the preceding item [10], the plurality of tab leads are stacked in the same direction and stored in the receiving recess of the container. Accordingly, when a plurality of tab leads are taken out from the housing recess after the tab lead package has been stored or transported, the tab leads are aligned in the same direction. Therefore, when setting each tab lead to a predetermined assembling apparatus (for example, an assembling apparatus for electrochemical devices), the setting operation can be easily performed.

FIG. 1 is a perspective view showing a tab lead packing container (container body) according to a first embodiment of the present invention together with a tab lead stack. FIG. 2 is a plan view of the container. FIG. 3 is a cross-sectional view taken along the line XX in FIG. 2 showing the container together with the tab lead stack. FIG. 4 is a cross-sectional view corresponding to FIG. 3, showing the container in a state in which the tab lead stack is accommodated in the accommodation recess. FIG. 5 is a perspective view showing the container in a state where the tab lead stack is accommodated in the accommodation recess. FIG. 6A is a plan view showing a first modification of the container. FIG. 6B is a plan view showing a second modification of the container. FIG. 6C is a plan view showing a third modification of the container. FIG. 6D is a plan view showing a fourth modification of the container. FIG. 7 is a perspective view showing a tab lead packing container (container body) according to a second embodiment of the present invention together with a tab lead stack. FIG. 8 is a plan view of the container. FIG. 9A is a cross-sectional view taken along line XX in FIG. 8 showing the same container together with a tab lead stack. 9B is a cross-sectional view taken along line YY in FIG. 9C is a cross-sectional view taken along the line ZZ in FIG. FIG. 10 is a perspective view showing the container in a state where the tab lead stack is accommodated in the accommodation recess. FIG. 11 is a cross-sectional view corresponding to FIG. 9A, showing the container in a state where the tab lead stack housed in the housing recess is being taken out.

  Next, several embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 to 5, the tab lead packaging container 1 according to the first embodiment of the present invention accommodates a plurality of tab leads 10 for storage, transportation, and the like. The container 1 includes a container body 2 and a cover body (not shown). The container 1 (detailed container body 2) is formed of a plastic molded product. Specifically, the container 1 is formed by heating and compressing a resin such as PET in a predetermined molding die. The wall thickness of the container 1 (in detail, the container body 2) is, for example, 0.5 to 2.0 mm, and the entire container body 2 is formed with a thickness in this range.

  The plurality of tab leads 10 accommodated in the container 1 (detailed container body 2) have the same shape and the same dimensions. Each tab lead 10 is used as a tab lead on the positive electrode side or the negative electrode side in a lithium ion secondary battery as an electrochemical device, and includes a tab lead body 11 having good conductivity and a strip-shaped insulating resin film 12. ing.

  The tab lead main body 11 has a plate shape (flat plate shape in detail) and is made of a metal such as aluminum or copper, and its planar shape is a square shape (in detail, a square or a rectangle). Either one of both end portions in the length direction of the tab lead body 11 is disposed in the outer package of the lithium ion secondary battery and is electrically connected to the current collector of the battery element (electrochemical element), and the other is packaged. It is arranged outside the body and is electrically connected to an external conductor such as a bus bar.

  The tab lead body 11 has a thickness of, for example, 0.1 to 1 mm, a length of, for example, 20 to 70 mm, and a width of, for example, 10 to 150 mm.

  The insulating resin film 12 is for ensuring electrical insulation between the tab lead main body 11 and the exterior body, and is made of an electrical insulating resin such as polyethylene or polypropylene. The insulating resin film 12 extends in the width direction of the tab lead body 11 in a state of covering the periphery of a part of the tab lead body 11 in the length direction and from both side edges of the tab lead body 11 in the width direction. Both end portions 12a and 12a are fixed to the tab lead main body 11 in a state protruding from both sides in the width direction by welding or the like.

  The position where the insulating resin film 12 is fixed to the tab lead main body 11 is a position corresponding to the seal portion of the exterior body in the tab lead main body 11, and in this embodiment, the intermediate position (center position) in the length direction of the tab lead main body 11. The position shifted to the one end 11a side.

  The thickness of the insulating resin film 12 is, for example, 0.08 to 0.4 mm, the length is slightly longer than the width dimension of the tab lead main body 11, for example, 12 to 160 mm, and the width is, for example, 5 to 20 mm.

  Here, as described above, since the insulating resin film 12 is fixed to a part of the length direction of the tab lead main body 11 as described above, the plurality of tab leads 10 are arranged in the same direction as shown in FIG. When stacked, the insulating resin films 12 and 12 adjacent to each other come into contact with each other and the other ends 11b and 11b of the tab lead bodies 11 and 11 adjacent to each other come into contact with each other. That is, the plurality of tab leads 10 are stacked in a fan shape in which the opposite end 11a side (that is, one end 11a side) spreads in the vertical direction around the other end 11b of the tab lead main body 11 in the side view.

  In the container 1 of the first embodiment, the container body 2 includes an upper wall portion 3 having an upper surface 3a having a planar view shape, and four front and rear left and right side walls extending downward from the outer peripheral edge of the upper wall portion 3. And a peripheral wall portion 4. The inside of the peripheral wall portion 4 is hollow, and the lower surface side of the container body 2 is open. In addition, 4a is the outer peripheral side surface of the container main body 2, and it is the outer peripheral side surface of the peripheral wall part 4 of the container main body 2 in detail.

  An upper surface 3 a of the container body 2 (that is, an upper surface 3 a of the upper wall portion 3 of the container body 2) is formed in parallel with the lower surface of the container body 2. Therefore, when the container main body 2 is placed on a predetermined horizontal placement surface (not shown), the upper surface 3a of the container main body 2 is horizontally arranged.

  On the upper surface 3 a of the container body 2, an accommodation recess 5 for accommodating a plurality of tab leads 10 from above with the tab leads 10 stacked in the same direction is formed in the upper surface 3 a so as to open. The number of tab leads 10 accommodated in the accommodating recess 5 is not limited. However, the number of tab leads 10 that are 10 to 100 can surely improve the accommodating workability and the taking out workability of the tab lead 10. Is particularly desirable. In the drawing, for convenience of explanation, the number of tab leads 10 is four, and the thicknesses of the tab lead main body 11 and the insulating resin film 12 are increased.

  As shown in FIGS. 1 and 2, the planar shape of the opening 5 c of the housing recess 5 parallel to the upper surface 3 a of the container body 2 is formed to correspond to the planar shape of the tab lead 10. Therefore, the accommodating recess 5 accommodates the first accommodating portion 5a that accommodates the tab lead body 11 of the tab lead 10 and the second accommodating portions 12a and 12a of the insulating resin film 12 that protrude from both side edges of the tab lead body 11 in the width direction. Parts 5b and 5b. Further, the housing recess 5 is formed so that the planar shape of the opening 5 c of the housing recess 5 is continuous in the depth direction of the housing recess 5.

  Further, as shown in FIG. 4, the housing recess 5 includes a lowermost tab lead 10 </ b> B (specifically, the lowermost tab lead 10 </ b> B) of the plurality of tab leads 10 (that is, the tab lead stack 15) housed in the housing recess 5. It has the bottom face part 6 which the other end 11b of the tab lead main body 11 and the insulating resin film 12 contact | abut. As shown in FIGS. 4 and 5, the top surface 11 c of the tab lead body 11 of the uppermost tab lead 10 A among the plurality of tab leads 10 accommodated in the accommodation recess 5 is parallel to the upper surface 3 a of the container body 2. It inclines with respect to the upper surface 3a of the container main body 2. The inclination angle θ (see FIG. 3) of the bottom surface portion 6 with respect to the top surface 3a of the container body 2 is set according to the number of tab leads 10 to be stacked, the thickness of the tab lead body 11, the thickness of the insulating resin film 12, and the like. Although there is no limitation, when the number of tab leads 10 accommodated in the accommodating recess 5 is 10 to 100, 5 ° to 40 ° indicates that the tab lead 10 can be accommodated and taken out. It is particularly desirable in that the improvement of the property can be surely achieved.

  Further, the depth of the accommodating recess 5, that is, the distance from the upper surface 3 a to the bottom surface portion 6 of the container body 2 is determined by the insulating resin film 12 of the uppermost tab lead 10 </ b> A among the plurality of tab leads 10 accommodated in the accommodating recess 5. The uppermost surface is set to be at the same height as the upper surface 3a of the container body 2 or at a slightly lower position.

  Further, on the upper surface 3 a of the container body 2, a take-out member (for example, a manipulator) for taking out a plurality of tab leads 10 housed in the housing recess 5 is provided on both sides in the length direction of the first housing portion 5 a of the housing recess 5. Hole-like insertion recesses (specifically, insertion hole portions) 7, 7 extend downward from the upper surface 3 a of the container body 2 and accommodate the upper surface 3 a of the container body 2. Openings are formed in the inner peripheral surface of the recess 5 at both ends in the length direction of the first housing portion 5a. When taking out the tab lead 10 from the housing recess 5, the take-out operation is performed by inserting the take-out member 25 into the insertion recesses 7, 7 from above. Therefore, the tab lead 10 can be easily taken out.

  In the first embodiment, the insertion recess 7 corresponds to an extraction operation recess for the operation of extracting the plurality of tab leads 10 accommodated in the accommodation recess 5 in the present invention. Moreover, in this specification, the taking-out member 25 includes the finger of the taking-out operator.

  The method for taking out the tab lead 10 will be described in detail as follows. That is, as shown by a two-dot chain line in FIG. 4, the takeout member 25 is inserted into both the insertion recesses 7 and 7 from above. These take-out members 25 pick and lift the longitudinal ends 11a and 11b of the tab lead main body 11 of the plurality of tab leads 10 (tab lead stack 15). As a result, the plurality of tab leads 10 are taken out from the housing recess 5 in a lump.

  In the container 1 of the first embodiment, after the plurality of tab leads 10 are accommodated in the accommodating recess 5, the tab lead 10 is prevented from accidentally jumping out of the accommodating recess 5 due to vibration during transportation or the like. In order to protect the upper surface of the tab lead 10A, it is desirable to cover at least the entire upper surface 3a of the container body 2 with a cover body (not shown). As this cover body, for example, a lid body that covers the container main body 2 so as to cover the entire upper surface 3a of the container main body 2 is used. Alternatively, the container body 2 may be placed in a bag made of a heat-shrinkable film as a cover, and the container body 2 may be covered with the bag by heating and shrinking the bag. After the main body 2 is inserted and the air in the bag is sucked out, the bag may be sealed with a heat seal or the like.

  By providing the cover body as described above, the container 1 can prevent the tab lead 10 from accidentally jumping out of the housing recess 5 due to vibration during transportation, or protect the upper surface of the uppermost tab lead 10A. it can.

  Thus, according to the container 1 of the first embodiment, the planar shape of the opening 5c of the housing recess 5 parallel to the upper surface 3a of the container body 2 is formed in a shape corresponding to the planar shape of the tab lead 10. Therefore, a plurality of tab leads 10 can be accommodated in the accommodating recess 5 while being stacked, so that the tab lead 10 can be accommodated easily.

  Furthermore, since the housing recess 5 is formed so that the planar shape of the opening 5c of the housing recess 5 is continuous in the depth direction of the housing recess 5, the tab lead 10 is displaced in the front-rear and left-right directions due to vibration during transportation. The movement can be blocked by the inner peripheral surface of the housing recess 5, thereby preventing the tab lead 10 from being deformed or damaged due to vibration during transportation.

  Furthermore, the housing recess 5 has a bottom surface portion 6 with which the lowest tab lead 10B of the plurality of tab leads 10 housed in the housing recess 5 abuts, and the bottom surface portion 6 is against the top surface 3a of the container body 2. Inclined. Therefore, when a plurality of tab leads 10 are stacked and stored in the storage recess 5, the lowest tab lead 10B of these tab leads 10 abuts against the bottom surface portion 6 of the storage recess 5, and the tab lead stack 15 These tab leads 10 can be accommodated so that the one end 11a side of the tab lead body 11 spreading in the vertical direction does not protrude above the position of the upper surface 3a of the container body 2, thereby stably accommodating a plurality of tab leads 10. can do. Further, the depth of the housing recess 5 can be made shallower than that of the housing recess in which the bottom surface portion 6 is formed in parallel with the upper surface 3a of the container body 2, thereby making it easier to house the tab lead 10. The tab lead 10 can be taken out easily.

  Of course, since the plurality of tab leads 10 are stacked in the same direction and stored in the storage recess 5, the storage product 5 is disassembled by disassembling the package 20 after storing or transporting the tab lead package 20. When a plurality of tab leads 10 are taken out from the tab leads 10, these tab leads 10 are aligned in the same direction. Therefore, when setting each tab lead 10 to the assembly apparatus of a lithium ion secondary battery, the setting operation | work can be performed easily.

  Further, the bottom surface portion 6 of the housing recess 5 is arranged such that the upper surface 11c of the tab lead body 11 of the uppermost tab lead 10A among the plurality of tab leads 10 housed in the housing recess 5 is parallel to the upper surface 3a of the container body 2. Since the container body 2 is inclined with respect to the upper surface 3a, the plurality of tab leads 10 can be reliably and stably accommodated.

  Furthermore, since the container body 2 is formed from a plastic molded product, the container body 2 can be manufactured inexpensively and easily.

  Although the container 1 of the said 1st Embodiment has the one accommodation recessed part 5 formed in the upper surface 3a of the container main body 2, the container which concerns on this invention is not limited to such a container. In addition, a plurality of housing recesses 5 may be formed on the upper surface 3 a of the container body 2.

  6A to 6D are views for explaining first to fourth modified examples of the container according to the first embodiment. In each container 1, for example, a plurality of receiving recesses 5 are formed on the upper surface 3a of the container body 2. Two receiving recesses 5 are formed. The difference between these containers 1 is that the directions of the four housing recesses 5 are different depending on the container main bodies 2.

  7-11 is a figure explaining 2nd Embodiment of this invention. In these drawings, the same reference numerals are assigned to the same elements as those in the first embodiment. The second embodiment will be described below with a focus on differences from the first embodiment.

  In the container 1 of the second embodiment, as shown in FIGS. 7 to 10, the total number of the accommodating recesses 5 is four. Of these accommodation recesses 5, two accommodation recesses 5, 5 are formed on the upper surface 3 a of the container body 2 in a line in the length direction of the accommodation recess 5. Similarly, the remaining two housing recesses 5 and 5 are formed on the upper surface 3a of the container body 2 in a line in the length direction of the housing recess 5 and in parallel with the arrangement direction of the two housing recesses 5 and 5. Has been. The directions of the receiving recesses 5 are the same in the direction in which the receiving recesses 5 are arranged. In addition, the length direction of the housing recess 5 means the length direction of the tab lead body 11 of the tab lead 10 housed in the housing recess 5.

  Further, in the two receiving recesses 5, 5 arranged in a row, a take-out operation groove portion 9 for taking out a plurality of tab leads 10 received in the receiving recess 5 is formed on the upper surface 3 a of the container main body 2. The two receiving recesses 5, 5 are formed so as to extend from the outer peripheral side surface 4 a of the two receiving recesses 5 in order so as to sequentially pass through the upper end portion 6 a, the intermediate portion 6 b, and the lower end portion 6 c of the bottom face portion 6 of each receiving recess 5. Further, the groove 9 extends straight so as to connect the two receiving recesses 5, 5 aligned in a row.

  Further, since the groove portion 9 extends from the outer peripheral side surface 4 a of the container main body 2, an inlet opening 9 a for the groove portion 9 is formed on the outer peripheral side surface 4 a of the container main body 2.

  In the second embodiment, as shown in FIG. 11, at least one finger 25 a among the plurality of fingers 25 a and 25 b of the take-out operator is inserted as the take-out member 25 into the groove portion 9.

  A method for taking out the tab lead 10 from the container 1 according to the second embodiment will be described as follows. That is, as shown in FIG. 11, one finger (for example, index finger) 25a is inserted into the groove 9 from the outside of the outer peripheral side surface 4a of the container body 2 through the entrance opening 9a. Then, the intermediate portion of the plurality of tab leads 10 is picked and lifted in the thickness direction by the inserted finger 25a and the other finger (for example, thumb) 25b arranged above the uppermost tab lead 10A. As a result, the plurality of tab leads 10 are taken out from the housing recess 5 in a lump. Such a take-out operation is sequentially performed on all the housing recesses 5 along the groove 9.

  In the container 1 of the second embodiment, the take-out operation groove 9 extends from the outer peripheral side surface 4 a of the container body 2. Therefore, when the plurality of tab leads 10 are taken out, the finger 25a can be easily inserted into the groove 9 by inserting the finger 25a into the groove 9 from the outside of the outer peripheral side surface 4a of the container body 2. In addition, the groove portion 9 passes through the upper end portion 6 a of the bottom surface portion 6 of the housing recess 5 and extends to at least the intermediate portion 6 b of the bottom surface portion 6. Therefore, the plurality of tab leads 10 are collectively and stably removed from the accommodating recess 5 by gripping the intermediate portion of the plurality of tab leads 10 in the thickness direction with the fingers 25a and the other fingers 25b thus inserted. Can be picked up. Therefore, the tab lead 10 can be taken out more easily.

  In addition, the groove portion 9 passes through the upper end portion 6a, the intermediate portion 6b, and the lower end portion 6c of the bottom surface portion 6 of each receiving recess portion 5 in order and connects the receiving recess portions 5 in the arrangement direction of the receiving recess portions 5. It is formed to extend. Therefore, the plurality of tab leads 10 accommodated in the respective accommodating recesses 5 can be sequentially taken out with the fingers 25 a inserted into the groove portions 9. Therefore, the tab lead 10 can be taken out even more easily.

  Furthermore, the present invention is not limited to the first and second embodiments and the modifications described above, and can be variously modified without departing from the gist of the present invention.

  Furthermore, the present invention may be configured by combining two or more of all the technical matters applied to the first and second embodiments and the modified examples.

  Moreover, although the container of the said embodiment is for accommodating the tab lead used for a lithium ion secondary battery as a tab lead used for an electrochemical device, in this invention, the tab lead which should be accommodated in a container is lithium. It is not limited to being used for an ion secondary battery, but may be used for, for example, an electric double layer capacitor.

  INDUSTRIAL APPLICABILITY The present invention can be used for a packaging container that houses tab leads used for electrochemical devices (eg, lithium ion secondary batteries, electric double layer capacitors) for storage or transportation.

1: Container 2: Container body 3a: Upper surface 4a of container body: Outer peripheral side surface 5 of container body: Housing recess 5c: Opening of housing recess 6: Bottom surface 6a of housing recess: Upper end 6b of bottom surface: Middle of bottom surface Part 6c: Lower end 7 of the bottom surface part: Insertion recess (removal operation recess)
9: Unloading operation groove 10: Tab lead 10A: Uppermost tab lead 10B: Lowermost tab lead 11: Tab lead body 12: Insulating resin film 15: Tab lead stack 20: Tab lead package 25: Unloading member

Claims (10)

An insulating resin film extends in the width direction of the tab lead body on both sides of the tab lead body in the length direction, and both ends of the insulating resin film are on both sides in the width direction of the tab lead body. A packaging container for accommodating a plurality of tab leads fixed in a protruding state,
On the upper surface of the container body, there is formed an accommodation recess that accommodates a plurality of tab leads stacked from above in the same direction, from above.
The planar shape of the opening of the housing recess parallel to the upper surface of the container body is formed into a shape corresponding to the planar shape of the tab lead,
The housing recess has a bottom surface portion with which the lowest tab lead contacts among the plurality of tab leads housed in the housing recess, and the bottom surface portion is inclined with respect to the upper surface of the container body. Packing container.   The bottom surface of the housing recess is inclined with respect to the top surface of the container body so that the top surface of the tab lead body of the uppermost tab lead among the plurality of tab leads housed in the housing recess is substantially parallel to the top surface of the container body. The tab lead packing container according to claim 1.   2. An extraction operation recess for an operation of taking out a plurality of tab leads accommodated in the accommodation recess is formed in the upper surface of the container body so as to open to the upper surface of the container body and the inner peripheral surface of the accommodation recess. Or the packaging container for tab leads of 2.   On the upper surface of the container main body, a take-out operation groove portion for taking out a plurality of tab leads accommodated in the accommodating recess passes from the outer peripheral side surface of the container main body to the upper end portion of the bottom surface portion of the accommodating recess and is at least in the middle The tab lead packing container according to any one of claims 1 to 3, wherein the packing container is formed to extend to a portion. A plurality of receiving recesses are formed side by side in the length direction of the receiving recesses on the upper surface of the container body,
On the upper surface of the container main body, a take-out operation groove portion for taking out a plurality of tab leads accommodated in the accommodating recesses is sequentially arranged from the outer peripheral side surface of the container main body to the upper end portion, the intermediate portion and the lower end portion of the bottom portion of each accommodating recess portion. The tab lead packaging container according to any one of claims 1 to 4, wherein the container is formed to extend in the direction in which the plurality of housing recesses are arranged so as to pass through and connect the plurality of housing recesses.   The tab lead packaging container according to any one of claims 1 to 5, wherein an inclination angle of a bottom surface portion of the housing recess with respect to an upper surface of the container body is set in a range of 5 ° to 40 °.   The packaging container for tab leads according to claim 6, wherein the accommodating recess is accommodated from above in a state where 10 to 100 tab leads are stacked in the same direction as a plurality of tab leads. The insulating resin film is fixed at a position shifted to one end side with respect to the intermediate position in the length direction of the tab lead body,
The tab lead packaging container according to any one of claims 1 to 7, wherein the plurality of tab leads are stacked so that one end side of the tab lead main body extends in a vertical direction in the side view.   The tab lead packaging container according to any one of claims 1 to 8, wherein the tab lead is used for an electrochemical device.   A tab lead packaged product in which a plurality of tab leads are stored in the storage recesses of the packing container according to any one of claims 1 to 9 in a state of being stacked in the same direction.

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