JP5502045B2 - Laminate tape applicator - Google Patents

Description

  The present invention relates to a laminated tape applying apparatus used in, for example, a manufacturing process of a laminated battery.

  In the manufacturing process of the laminated structure type battery, the sheet-like positive electrode foil and the negative electrode foil are alternately laminated via the sheet-like separator. Each of the positive electrode foil and the negative electrode foil is configured by applying an active material to a predetermined metal electrode foil main body. The separator is made of, for example, an electrically insulating porous resin film.

  Conventionally, sheet bodies such as positive electrode foil, negative electrode foil, and separator are generally fixed by sticking a fixing tape or the like to the side edge of the laminated body so that each sheet body is not scattered after being laminated. It has become.

  As a method of sticking the fixing tape to the side edge of the laminated body, for example, while pressing the fixing tape against the laminated body so that the side edge of the laminated body is traced in a U shape by a roller from the front surface to the back surface of the laminated body. A method of bonding can be considered (see, for example, Patent Document 1).

JP-A-10-59321

  However, as in the prior art, in the method in which the fixing tape is adhered to the laminated body by simply tracing the side edge of the laminated body with a roller, the fixing tape 91 bites in, for example, as shown in FIG. As a result, the side edges of the laminate 92 may be crushed and the sheet 93 may be wrinkled or cracked.

  Further, as shown in FIGS. 14A and 14B, in the process of applying the fixing tape 91, when the roller 95 wraps around from the side surface of the laminated body 92 to the back surface, the sheet body 93 is rolled up, and the sheet body. There is a possibility that the 93 may be bent.

  As a result, abnormalities such as wrinkles, cracks, and bends generated in the sheet body may cause a short circuit of the battery and the product quality may be deteriorated.

  In view of this, if the urging force of the roller is weakened, it is difficult to sufficiently secure the adhesive force of the fixing tape to the laminate, and the fixing tape may be peeled off from the laminate.

  This invention is made | formed in view of the said situation, The objective is to provide the tape sticking apparatus of the laminated body which can suppress the quality fall of a laminated body.

  Hereinafter, each means suitable for solving the above-described problem will be described separately. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1. A tape applicator for applying a fixing tape from the front surface to the back surface of a laminate in which a plurality of sheet bodies are laminated,
A pressing means for pressing and adhering the fixing tape to the laminated body at least from the side surface to the front surface or the back surface of the laminated body,
Among the pasting sections in which the fixing tape is pasted to the laminate by the pressing means, at least a predetermined section from the corner portion between the side surface and the front surface or the back surface of the laminate is applied to the laminate by the pressing means. A non-pressing section in which the fixing tape is not pressed is a laminated tape applying device.

  According to the means 1, the predetermined section from the corner portion between the side surface and the surface of the laminated body is a non-pressing section in which the fixing tape is not pressed against the laminated body by the pressing means in the fixing tape sticking section. Yes. Thereby, while the pressing means passes through the non-pressing section, the strain (bending of the sheet body) and the compression accumulated in the laminated body due to the load from the pressing means so far can be removed, and the original state can be restored. Therefore, compared to the conventional case where the pressing sections are continuous, the sheet body is less likely to be abnormal such as wrinkles, cracks, and bending. As a result, quality degradation of the laminate can be suppressed.

  Moreover, according to this means, since it is not necessary to weaken the pressing force by the pressing means, the adhesive force of the fixing tape to the laminate is sufficiently ensured with respect to the part pressed by the pressing means such as the end of the fixing tape. be able to. For this reason, generation | occurrence | production of the malfunction that a fixed tape peels from a laminated body can be suppressed.

  In addition, the “side surface” of the laminated body refers to one surface to be affixed to the tape among the four surrounding surfaces where the peripheral portions of the plurality of laminated sheet bodies are exposed in layers.

Mean 2. The pressing means is
An arm portion that is bent or curved and is pivotally supported around one end thereof in a direction parallel to the side surface and the surface of the laminate (direction along the corner portion);
Moving means for moving the arm portion along a direction orthogonal to the surface of the laminate;
A pressing portion that is provided on the other end side of the arm portion and presses the fixing tape against the laminated body;
Biasing means for biasing the arm portion so that the pressing portion is in pressure contact with the laminated body;
The laminated body tape sticking device according to means 1, wherein the pivot axis position of the arm portion is disposed closer to the laminated body side than the side surface with respect to a direction orthogonal to the side surface of the laminated body. .

  According to the means 2, the pressing part such as a free roller provided at the tip of the bent arm part is pressed against the laminated body by a biasing means such as a spring, and the moving means along the longitudinal direction of the fixed tape. By moving, the fixing tape can be applied from the side surface of the laminate to the surface or the like. Here, the pressing part moves along the longitudinal direction of the tape without being pressed against the laminated body in a predetermined section when it moves from the side surface of the laminated body to the surface or the like due to the rotational axis position of the arm part. Then, after passing through the section, the laminate is pressed again and the fixing tape is adhered. Thus, according to the means 2, the structure of the means 1 can be realized with a relatively simple structure, and the apparatus can be prevented from becoming complicated.

  Means 3. The laminated body tape sticking device according to means 2, further comprising adjusting means for adjusting the rotational axis position of the arm portion with respect to a direction orthogonal to the side surface of the laminated body.

  According to the means 3, the length of the non-pressing section where the fixing tape is not pressed against the laminated body can be changed by making it possible to adjust the rotational axis position of the arm portion.

  Because there are differences in the strain and compression amount that occur in the laminate depending on the material of the laminate and the number of laminates, if the pivot axis position of the arm part is uniquely determined, convenience and versatility are reduced. There is a risk. In this respect, according to the present means, the fixing tape can be applied to the various laminated bodies in an optimum manner, and convenience and versatility can be improved. In addition, since the pivot axis position of the arm portion only needs to be adjusted with respect to the direction orthogonal to the side surface of the laminate, the biasing force of the biasing means such as a spring is adjusted to adjust the sticking mode of the fixing tape. Adjustment is easier than in the configuration.

  Means 4. The pressing portion wraps around the front surface side or the back surface side of the stacked body until the pressing portion moving along the side surface of the stacked body (direction perpendicular to the surface of the stacked body) is at least separated from the stacked body. 4. The laminate tape applicator according to means 2 or 3, further comprising a rotation restricting means for restricting the rotation of the arm portion.

  According to the means 4, by providing the rotation restricting means (for example, a cam or the like), it is possible to further reduce the occurrence of the problems at the corner portions of the laminated body.

  Means 5. The laminated tape applying device according to any one of means 2 to 4, wherein the pressing portion is a roller rotatably provided on the other end side of the arm portion.

  According to the means 5, the adhesiveness (adhesive force) of the fixing tape to the laminate can be enhanced.

  Means 6. The laminated body tape applicator according to any one of means 1 to 5, wherein the laminated body is a laminated battery element in which an electrode foil and a separator are laminated as the sheet body.

  According to the means 6, the above-described effects can be achieved in the manufacturing process of the laminated battery element.

It is a perspective view which shows schematic structure of a battery element. It is a front view which shows schematic structure of the principal part of a tape sticking apparatus. It is a schematic diagram for demonstrating the sticking process of a fixed tape. It is a schematic diagram which shows one operation | movement aspect of the rocking | swiveling member in the sticking process of a fixed tape. It is a schematic diagram which shows one operation | movement aspect of the rocking | swiveling member in the sticking process of a fixed tape. It is a schematic diagram which shows one operation | movement aspect of the rocking | swiveling member in the sticking process of a fixed tape. It is a schematic diagram which shows one operation | movement aspect of the rocking | swiveling member in the sticking process of a fixed tape. It is a schematic diagram which shows one operation | movement aspect of the rocking | swiveling member in the sticking process of a fixed tape. It is a schematic diagram which shows one operation | movement aspect of the rocking | swiveling member in the sticking process of a fixed tape. It is a schematic diagram which shows operation | movement of the rocking | swiveling member at the time of a roller passing a non-pressing area. It is a schematic diagram which shows the locus | trajectory of a roller. It is a schematic diagram which shows the locus | trajectory of the roller in another embodiment. It is a schematic diagram which shows the pasting process of the conventional fixing tape. (A), (b) is a schematic diagram which shows the pasting process of the conventional fixing tape.

  Hereinafter, an embodiment will be described with reference to the drawings. First, a configuration of a stacked lithium ion battery element as a stacked body to which a tape is applied by the tape applying apparatus of the present embodiment will be described.

  As shown in FIG. 1, the laminated body 1 which comprises a lithium ion battery element is laminated | stacked so that the negative electrode foil 2, the separator 3, the positive electrode foil 4, and the separator 3 may be repeatedly piled up in this order from the bottom ( Of course, the positive electrode foil 4 may be located in the lowermost layer, and the separator 3, the negative electrode foil 2, the separator 3, the positive electrode foil 4,. The negative electrode foil 2 and the positive electrode foil 4 are formed by coating and forming an active material on both the front and back surfaces of an electrode foil body made of a metal foil, and one side edge portion of the uncoated portion where the active material is not coated ( (Not shown). The electrode foil main body of the negative electrode foil 2 is made of copper, and the electrode foil main body of the positive electrode foil 4 is made of aluminum. Further, hereinafter, when it is not necessary to distinguish between positive and negative, the negative foil 2 and the positive foil 4 may be collectively referred to as “electrode foil”.

  The separator 3 is made of an electrically insulating sheet-like porous resin film, and has a rectangular shape that is substantially the same as or slightly larger than the planar rectangular portion (coating portion) of the negative electrode foil 2 and the positive electrode foil 4. There is no. In an appropriate layered state, the rectangular portions (coating portions) of the positive foil 4 and the negative foil 2 are completely covered (not protruding) by the separator 3, and the positive foil 4 and the negative foil 2 Each protruding portion, that is, only the uncoated portion protrudes from the separator 3 at different positions. Each uncoated portion corresponds to a negative electrode tab and a positive electrode tab, and is a region electrically connected to the negative electrode and the positive electrode of the electrode terminal inside the lithium ion battery. In the present embodiment, the negative electrode foil 2, the positive electrode foil 4, and the separator 3 constitute a sheet body. Hereinafter, when there is no need to distinguish between them, the negative electrode foil 2, the positive electrode foil 4, and the separator 3 may be collectively referred to as a “sheet body”.

  Moreover, the laminated body 1 is being fixed with the fixing tape 5 in four places around so that each sheet | seat body may not produce position shift. The fixing tape 5 is stuck to the side surface 1c from the front surface 1a to the back surface 1b of the laminate 1 (see FIG. 3).

  Next, the tape sticking apparatus 10 for sticking the fixing tape 5 to the laminate 1 will be described in detail. FIG. 2 is a schematic configuration diagram (front view) showing a main part of the tape applicator 10.

  The tape applicator 10 includes a guide rail 11 and is provided so as to be movable in the left-right direction.

  The tape sticking device 10 includes a base portion 12 provided so as to be movable along the guide rail 11 and a movable portion 13 assembled so as to be movable up and down with respect to the base portion 12.

  The base portion 12 is configured to be movable in the left-right direction along the guide rail 11 by driving means (not shown).

  The base portion 12 includes a pair of guide rods 14 for guiding the raising / lowering operation of the movable portion 13, a servo motor 15 serving as a driving unit for raising / lowering the movable portion 13, and the power of the motor 15 as the movable portion 13. And a ball screw 16 for transmitting to the head. The servo motor 15, the ball screw 16, and the like constitute moving means in this embodiment.

  The base portion 12 is provided with an adjusting screw 17 as an adjusting means for adjusting the position in the left-right direction (position with respect to the guide rail 11).

  The movable portion 13 is provided with a swing member 20 that is pivotally supported with the front-rear direction as an axis. The swing member 20 includes an arm portion 21 that is bent in a U-shape.

  The arm portion 21 is provided with a rotation shaft 22 that is an axial center at the upper end portion in the longitudinal direction, and a roller 23 is rotatably provided at the lower end portion in the longitudinal direction. The roller 23 constitutes a pressing portion in this embodiment.

  Further, the swing member 20 is provided with a lever portion 24 extending from the upper end side in the longitudinal direction of the arm portion 21.

  One end of a coil spring 27 as an urging means (elastic member) is attached to the upper end portion of the lever portion 24. The other end side of the coil spring 27 is fixed to the movable portion 13. As a result, the swing member 20 is biased counterclockwise with the rotation shaft 22 as a fulcrum.

  The rocking member 20, the coil spring 27, and the like constitute the pressing means in this embodiment.

  Next, the sticking operation of the fixed tape 5 by the tape sticking device 10 will be described. First, the laminate 1 is transported and set to the tape applicator 10 by a predetermined transport means. Here, the laminate 1 is set to the right of the swing member 20, and the pivot axis position of the swing member 20 is stacked in the left-right direction (the direction perpendicular to the side surface 1c of the laminate 1). It arrange | positions from the side surface 1c of the body 1 at the right side (laminated body side).

  Subsequently, the fixing tape 5 cut to a predetermined length in advance prior to sticking is sucked and conveyed by the holding member 30, and one end in the longitudinal direction thereof is stuck to the surface 1a of the laminate 1 (see FIG. 3). Here, the holding member 30 is placed on the laminate 1 so that the side surface 30a thereof is substantially flush with the side surface 1c of the laminate 1, and one end side in the longitudinal direction of the fixing tape 5 is the surface 1a of the laminate 1. Pressed to the state. Further, the other end of the fixing tape 5 in the longitudinal direction protrudes laterally from the side surface 30 a of the holding member 30 and the side surface 1 c of the laminated body 1.

  In this state, with the holding member 30 holding the one end side of the fixing tape 5, the base portion 12 moves along the guide rail 11 in the direction approaching the laminate 1, and the roller 23 of the swing member 20 is moved to the holding member. 30 is in pressure contact with the side surface 30a. Then, the swinging member 20 rotates in the clockwise direction about the rotation shaft 22 against the elastic force of the coil spring 27 (see FIG. 4).

  In this state, when the movable portion 13 is lowered, the roller 23 of the swinging member 20 is rotated in a state where it is pressed against the side surface 30a of the holding member 30, while the side surface 30a of the holding member 30 and thus the laminated body 1 is rotated. It descends along the side surface 1c. The fixing tape 5 is bent along the side surface 1c of the laminated body 1 by the roller 23, and is then affixed while being pressed against the side surface 1c of the laminated body 1 (see FIG. 5).

  When the roller 23 reaches the corner 1d between the side surface 1c and the back surface 1b of the laminate 1 (see FIG. 6), the roller 23 bends the fixing tape 5 by the elastic force of the coil spring 27, and the laminate 1 The swing member 20 rotates so as to go around the back surface 1b (see FIG. 7).

  Here, when the roller 23 wraps around from the side surface 1c of the laminated body 1 to the back surface 1b due to the rotational axis position of the swinging member 20, the roller 23 moves from the corner portion 1d of the laminated body 1 to a predetermined section W (FIG. 10). , 11), only the fixing tape 5 is supported in a state of being separated from the laminate 1 without being brought into pressure contact with the laminate 1, and moves along the back surface 1b of the laminate 1 (see FIG. 8). The predetermined section W corresponds to a non-pressing section in the present embodiment. FIG. 10 is a schematic diagram illustrating the operation of the swing member 20 when the roller 23 passes through a predetermined section (non-pressing section) W, and FIG. 11 is a schematic diagram illustrating the trajectory of the roller 23. Here, circles a to f in FIG. 11 correspond to the positions of the rollers 23 shown in FIGS.

  Then, when the roller 23 passes the predetermined section W, the roller 23 comes into pressure contact again with the laminated body 1 and presses the end portion of the fixing tape 5 against the back surface 1 b of the laminated body 1. Thereby, the fixing tape 5 is bonded to the back surface 1b of the laminate 1, and the attaching operation of the fixing tape 5 is completed (see FIG. 9).

  As described in detail above, according to the present embodiment, in the pasting section of the fixing tape 5, the predetermined section W from the corner portion 1 d between the side surface 1 c and the back surface 1 b of the multilayer body 1 is transferred to the multilayer body 1 by the roller 23. On the other hand, it is a non-pressing section where the fixing tape 5 cannot be pressed. Thereby, while the roller 23 passes through the non-pressing section W, the strain (bending of the sheet body) and the compression accumulated in the laminated body 1 due to the load from the roller 23 so far are removed, and the original state is restored. Therefore, as compared with the conventional case where the pressing section is continuous, the sheet body is less likely to have abnormalities such as wrinkles, cracks, and bending. As a result, the quality deterioration of the laminated body 1 can be suppressed.

  Moreover, according to this embodiment, since it is not necessary to weaken the pressing force by the roller 23, about the site | part pressed by the roller 23, such as the edge part of the fixing tape 5, the adhesive force of the fixing tape 5 to the laminated body 1 is shown. It can be secured sufficiently. For this reason, generation | occurrence | production of the malfunction that the fixing tape 5 peels from the laminated body 1 can be suppressed.

  Furthermore, in this embodiment, the adjustment screw 17 which adjusts the position of the left-right direction of the base part 12 is provided. Thereby, the rotational axis position of the swing member 20 can be adjusted with respect to the direction orthogonal to the side surface 1c of the laminated body 1, and the length of the non-pressing section W in which the fixing tape 5 is not pressed against the laminated body 1. Can be changed. As a result, the fixing tape 5 can be affixed to the various laminates 1 in an optimum manner, and convenience and versatility can be improved. Further, since it is only necessary to adjust the position of the pivot axis of the swinging member 20, adjustment is easier than the configuration in which the biasing force of the coil spring 27 is adjusted to adjust the sticking mode of the fixed tape 5.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the said embodiment, although the fixed tape 5 is affixed with respect to the laminated body 1 which comprises a lithium ion battery element with the tape sticking apparatus 10, the laminated body used as a sticking object is limited to this. It is good also as a structure which affixes the fixed tape 5 with respect to the laminated body which comprises a capacitor | condenser etc., for example.

  (B) In the said embodiment, although it becomes the structure which affixes the fixing tape 5 to 4 places with respect to the laminated body 1, the affixing location of the fixing tape 5 is not limited to this.

  (C) In the above-described embodiment, the roller 23 provided at the tip of the swingable member 20 that is rotatably provided is pressed against the laminated body 1 by the elastic force of the coil spring 27 while moving in the longitudinal direction of the fixed tape 5. The fixing tape 5 is pasted from the side surface 1c to the back surface 1b of the laminated body 1 by being moved by the servo motor 15 or the like. The configuration of the tape applicator 10 is not limited to the above embodiment, and any other configuration is possible as long as a non-pressing section in which the fixed tape 5 is not pressed against the laminate 1 by a predetermined pressing means is provided. May be adopted.

  (D) In the above-described embodiment, the arm portion 21 is bent and formed in a U shape. However, the configuration is not limited to this, and the arm portion 21 may be bent in a C shape, for example.

  (E) In the above embodiment, the pressing portion is configured by the roller 23, but the configuration of the pressing portion is not limited to this. For example, the roller 23 may be omitted, or the roller 23 may be configured not to rotate.

  (F) In the above embodiment, the fixing tape 5 is applied by the swing member 20 from the side surface 1c to the back surface 1b of the laminated body 1. However, the present invention is not limited to this, for example, from the side surface 1c of the laminated body 1. It is good also as a structure which affixes the fixing tape 5 over the surface 1a, and it is good also as the rocking | fluctuation member 20 grade | etc., The whole sticking area of the fixing tape 5 from the surface 1a of the laminated body 1 to the side surface 1c and the said side surface 1c to the back surface 1b. It is good also as a structure stuck by a press means.

  (G) In the above embodiment, the coil spring 27 is employed as the urging means. However, the present invention is not limited to this, and other urging means may be employed as long as the roller 23 can be pressed against the laminated body 1. May be.

  (H) Instead of the above embodiment, as shown in FIG. 12, for example, the roller 23 moving along the side surface 1c of the laminated body 1 is at least separated from the laminated body 1 (see a circle h in FIG. 12). It is good also as a structure provided with rotation control means, such as a cam which controls rotation of the arm part 21 in which 23 wraps around the back surface 1b side of the laminated body 1. Thereby, generation | occurrence | production of the said malfunctions, such as crushing in the corner part 1d of the laminated body 1, can further be reduced. Circles g to j in FIG. 12 indicate the positions of the moving rollers 23.

  (I) In the above embodiment, the predetermined section W from the corner portion 1d of the stacked body 1 is a non-pressing section where the roller 23 is not pressed against the stacked body 1. The non-pressing section is not limited to this. For example, a section in which the roller 23 is not pressed against the side surface 1c in the vicinity of the corner portion 1d of the laminated body 1 by a cam or the like that controls the movement of the arm portion 21 is provided. Also good.

  DESCRIPTION OF SYMBOLS 1 ... Laminated body, 5 ... Fixed tape, 10 ... Tape sticking apparatus, 20 ... Swing member, 21 ... Arm part, 22 ... Rotating shaft, 23 ... Roller, 27 ... Coil spring, 30 ... Holding member, W ... Predetermined Section (non-pressing section).

Claims (6)

A tape applicator for applying a fixing tape from the front surface to the back surface of a laminate in which a plurality of sheet bodies are laminated,
A pressing means for pressing and adhering the fixing tape to the laminated body at least from the side surface to the front surface or the back surface of the laminated body,
Among the pasting sections in which the fixing tape is pasted to the laminate by the pressing means, at least a predetermined section from the corner portion between the side surface and the front surface or the back surface of the laminate is applied to the laminate by the pressing means. A non-pressing section in which the fixing tape is not pressed is a laminated tape applying device. The pressing means is
An arm part that is bent or curved and is pivotally supported at one end thereof so as to be pivotable about a direction parallel to the side surface and the surface of the laminate;
Moving means for moving the arm portion along a direction orthogonal to the surface of the laminate;
A pressing portion that is provided on the other end side of the arm portion and presses the fixing tape against the laminated body;
Biasing means for biasing the arm portion so that the pressing portion is in pressure contact with the laminated body;
2. The tape sticking of the laminate according to claim 1, wherein the rotational axis center position of the arm portion is arranged closer to the laminate body side than the side surface in a direction orthogonal to the side surface of the laminate. apparatus.   3. The laminated body tape sticking device according to claim 2, further comprising adjusting means for adjusting a rotational axis position of the arm portion with respect to a direction orthogonal to a side surface of the laminated body.   Rotation restriction that restricts the rotation of the arm portion that the pressing portion turns to the front surface side or the back surface side of the laminated body until the pressing portion that moves along the side surface of the laminated body is separated from at least the laminated body. The laminated tape applying device according to claim 2 or 3, further comprising means.   The laminated body tape sticking device according to any one of claims 2 to 4, wherein the pressing portion is a roller rotatably provided on the other end side of the arm portion.   The laminated body tape applicator according to any one of claims 1 to 5, wherein the laminated body is a laminated battery element in which an electrode foil and a separator are laminated as the sheet body.

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