JP2014179304A - Method and device for forming electrode laminate for secondary battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for forming an electrode laminate for a secondary battery in which, when a positive electrode plate sheet and a negative electrode plate are laminated, lamination can be efficiently performed in accordance with a specified dimension in a short time.SOLUTION: In a method for forming an electrode laminate for a secondary battery, a plurality of positive electrode plate sheets 100 formed by a device for forming a positive electrode plate sheet are continuously supplied at a predetermined interval, a plurality of negative electrode plates 150 whose external dimension becomes substantially equal to that of the positive electrode plate sheet 100 are supplied to perform accumulation operation in which such electrode plates are alternately accumulated one by one, and deviation prevention operation is performed in which deviation between the positive electrode plate sheet and a negative electrode plate from each other is made within a desired range in response to the accumulation operation.

Description

  The present invention relates to a method and an apparatus for producing an electrode laminate for a secondary battery, which is a constituent element of a secondary battery used for a battery of, for example, a notebook personal computer, a hybrid vehicle, and an electric vehicle.

  2. Description of the Related Art Conventionally, for example, a method and an apparatus for producing an electrode laminate for a secondary battery, which is a constituent element of a secondary battery used for a battery of a notebook personal computer, a hybrid vehicle, an electric vehicle, etc. (for example, Patent Document 1 Patent Document 2).

  The electrode sheet disclosed in Patent Document 1 is placed on the upper surface of the lower separator, which is conveyed by a conveyor and unwound from the lower separator unwinding portion, alternately on the positive electrode plate and the negative electrode plate via the suction portion of the moving hand. The upper separator unwound from the upper separator unwinding section is overlapped via a nip roll, and the electrode plates sandwiched between the positive electrode plate and the negative electrode plate by the two separators are alternately overlapped by a swing mechanism. A laminated portion is formed.

JP 2012-74402 A JP 2012-226910 A

  When an electrode sheet is to be produced using the secondary battery electrode laminate production apparatus disclosed in Patent Document 1, in order to place the positive electrode plate and the negative electrode plate on each separator while accurately positioning the positive electrode plate, When placing the negative electrode plate on the separator, it is necessary to stop the separator transport device each time. If such an intermittent feeding operation of the separator is performed, the production efficiency of the electrode sheet is remarkably lowered, and the separator itself on the conveyor is suddenly stopped or the movement of the separator itself is suddenly moved. A special structure is required to prevent the relative displacement between the stacked positive electrode plates and negative electrode plates.

  The reason for this is that if such a misalignment occurs, it will be rejected from the line as a defective product and the yield will decrease, or if it is a product, it will be a defective product and the electrodes will contact each other, causing a short circuit and an accident. This may be a cause.

  On the other hand, in the secondary battery electrode laminate manufacturing apparatus disclosed in Patent Document 2, as is clear from the description in paragraphs (0043) to (0048) of the same document and the drawings related thereto, one separator is provided. After flowing in the vertical direction, the zigzag folding means is used to make the zigzag folded state, and then a positive electrode plate is inserted from one of the left and right sides of the zigzag folded separator, and the negative electrode plate is stacked from the other, thereby stacking them. Is supposed to create.

  However, in the electrode laminate for a secondary battery described in Patent Document 2, as in Patent Document 1 described above, both surfaces of a positive electrode plate supplied at a predetermined interval are sandwiched between separators that are continuously fed out. In addition, since the electrode sheet formed by cutting the overlapping portions of the separators in this state is not laminated with the negative electrode plate one by one, the electrode stack for the secondary battery can be accurately formed in a short time. It cannot be created efficiently. In addition to this, according to the method for producing an electrode laminate for a secondary battery described in Patent Document 2, a fold line cannot be firmly formed in the folded portion of the separator, resulting in an undesired thickness. A complicated device structure is required to strictly control the position. Moreover, according to the structure disclosed by patent document 2, the process of alignment, welding, and a cutting | disconnection is further required after the said process.

  For this reason, the positive electrode sheet and the negative electrode plate covered with the separator are alternately laminated for each positive electrode plate, and the edges of the laminated positive electrode sheets and negative electrode plates are equal to each other. Thus, there is a demand for a method and an apparatus for producing a secondary battery electrode laminate in which secondary battery electrode laminates that are not displaced from each other are produced continuously in a short time efficiently.

  An object of the present invention is to provide a method for producing an electrode laminate for a secondary battery that can be efficiently laminated in a short time according to a specified dimension when laminating a positive electrode plate sheet and a negative electrode plate having the opposite polarity. And providing a creation apparatus.

In order to solve the above-described problem, a method for producing an electrode laminate for a secondary battery according to claim 1 of the present invention includes:
Prepare a first separator and a second separator that are each wound in a roll shape and sent out so as to overlap each other from the state wound in the roll shape,
While the first separator and the second separator are continuously sent out, a positive electrode plate having a length in the width direction perpendicular to the separator running direction is shorter than that of the separator between these separators. Sandwiched at a predetermined interval
The positive electrode plates sandwiched between the two separators are partially welded at both sides in the width direction corresponding to the width direction of the separator and overlapping portions of the separators at a predetermined interval in the running direction of the separator. And partially welding the overlapping portion of the separators between the positive plates in the running direction of the separator at a predetermined interval in the width direction of the separator,
A cutter body provided with a predetermined length of cutter in the circumferential direction at a predetermined position in the longitudinal direction, and the cutter corresponding to the predetermined length in the longitudinal direction at a predetermined position in the circumferential direction to receive the cutter. Prepare a separator cutting device consisting of a cutter cylinder with a cutter holder,
Rotating the cutter cylinder and cutter receiving cylinder of the cutting apparatus so that the circumferential surfaces of the cutter cylinder and cutter receiving cylinder of the cutting apparatus are in the same direction as the traveling direction of the separator,
The two separators that are continuously sent out are arranged side by side at a predetermined interval in the running direction of the separator in a state where the separator is sandwiched between the separator presser of the cutter cylinder and the cutter receiver of the cutter receiver cylinder. By cutting the overlapping part of the separator located between the positive electrode plates with a cutter, a positive electrode sheet is created in which the front and back of the positive electrode plate are sandwiched between two separators and the periphery is surrounded by the overlapping part of the separator And
A plurality of the prepared positive electrode plate sheets are continuously supplied at a predetermined interval, and a plurality of negative electrode plates having the same outer diameter as the outer dimensions of the positive electrode plate sheet are supplied. A stacking operation for alternately stacking sheets one by one is performed, and a shift prevention operation for setting a shift between the positive electrode plate sheet and the negative electrode plate within a desired range is performed in accordance with the stacking operation.

Moreover, the electrode laminated body preparation apparatus for secondary batteries of Claim 4 of this invention is the following.
A device for producing a positive electrode plate sheet used for a secondary battery having a structure in which a positive electrode plate and a negative electrode plate are laminated while being insulated from each other via a separator made of an insulating sheet,
A separator supply device for feeding the continuous first separator and the second separator wound in a roll shape so as to overlap each other from the state wound in the roll shape;
A positive electrode plate supply device that supplies a positive electrode plate whose length in the width direction perpendicular to the separator travel direction is shorter than that of the first separator and the second separator;
A positive plate transport device for transporting the positive plate supplied by the positive plate supply device to a predetermined position;
A sandwiching device for sequentially sandwiching the positive electrode plate conveyed by the positive electrode plate conveyance device so as to be separated by a predetermined interval in the separator delivery direction between the two fed-out separators;
The positive electrode plates sandwiched between the two separators are partially welded at both sides in the width direction corresponding to the width direction of the separator and overlapping portions of the separators at a predetermined interval in the running direction of the separator. And a welding device that partially welds the overlapping portion of the separators between the positive plates in the running direction of the separator at a predetermined interval in the width direction of the separator;
A cutter body provided with a predetermined length of cutter in the circumferential direction at a predetermined position in the longitudinal direction, and the cutter corresponding to the predetermined length in the longitudinal direction at a predetermined position in the circumferential direction to receive the cutter. A separator cutting apparatus comprising a cutter receiving cylinder provided with a cutter receiver, wherein the separators are positioned between the two separators and arranged between the positive plates arranged at predetermined intervals in the running direction. A cutting device for cutting the stacked separators so as to bisect the mating portions,
A plurality of positive plate sheets that are cut by the cutting device and fed continuously at a predetermined interval, and a plurality of negative plate plates that have substantially the same outer diameter as the outer dimensions of the positive plate sheet are alternately placed one by one. And a stacking device having a shift prevention unit that sets a shift between the positive electrode plate sheet and the negative electrode plate within a desired range.

  According to the secondary battery electrode laminate production method according to claim 1 of the present invention and the secondary battery electrode laminate production apparatus according to claim 4, the two strip-shaped separators wound in a roll shape are stacked on each other. When the two separators that are continuously sent out are overlapped, the positive electrode plates are sequentially sandwiched between them with a predetermined distance between them. . Therefore, when the positive electrode plate is accurately positioned and placed on the separator as in the invention disclosed in Patent Document 1, it is not necessary to intermittently stop the separator transport device every time. In other words, since it is not necessary to perform the intermittent feeding operation of the separator, the production efficiency of the positive electrode plate sheet is greatly improved as compared with the prior art, and the positive electrode plate is rapidly stopped and the movement of the positive electrode plate is started suddenly. It avoids the occurrence of deviation on its own conveyor belt and deviation between the separator and the positive electrode plate superimposed thereon.

  In addition, by having the above-described stacking device, the positive electrode sheet and the negative electrode plate covered with the separator are alternately stacked for each positive electrode plate, and each edge of the stacked positive electrode sheet and negative electrode plate It is possible to efficiently produce a secondary battery electrode laminated body having the same part and not shifted from each other according to the specified dimensions in a short time. Therefore, unlike the invention described in Patent Document 2, no unnecessary thickness is generated in the folded portion of the separator, and a complicated device structure for strictly managing the folded position of the separator is not required.

Further, the secondary battery electrode laminate preparation method according to claim 3 of the present invention is the secondary battery electrode laminate preparation method according to claim 1 or 2,
The positive electrode plate sheet and the negative electrode plate have a rectangular shape, and a support substrate that supports the bottom surface of the electrode stack, and a first edge of the support substrate that rises in a direction perpendicular to the upper surface of the support substrate. The first side plate has a second side plate that rises in a direction perpendicular to the upper surface of the support substrate from the second edge portion of the support substrate, and that the angle between the first side plate and the first side plate is a right angle. While performing the stacking operation using the integration unit,
The first side edge in the stacking direction of each positive electrode sheet and the stack of each negative electrode plate sequentially stacked on the support substrate of the integrated unit abuts the first side plate over the entire edge extending direction, A second side edge in the stacking direction of each positive electrode plate sheet and each negative electrode plate stack sequentially stacked on the support substrate of the stacking unit abuts on the second side plate in the entire edge extending direction. The shift prevention operation is performed by the shift prevention unit applying vibration to the stacked portion.

Moreover, the electrode laminated body preparation apparatus for secondary batteries of Claim 5 of this invention is the electrode laminated body preparation apparatus for secondary batteries of Claim 4,
The positive electrode sheet and the negative electrode plate have a rectangular shape, and the stacking unit of the stacking device includes a support substrate that supports a bottom surface of the electrode stack, and a first edge of the support substrate on the upper surface of the support substrate. The angle between the first side plate rising in the vertical direction and the second side edge of the support substrate in the vertical direction with respect to the upper surface of the support substrate is perpendicular to the first side plate. A second side plate
The first side edge in the stacking direction of each positive electrode sheet and the stack of each negative electrode plate sequentially stacked on the support substrate of the integrated unit abuts the first side plate over the entire edge extending direction, A second side edge in the stacking direction of each positive electrode plate sheet and each negative electrode plate stack sequentially stacked on the support substrate of the stacking unit abuts on the second side plate in the entire edge extending direction. The misalignment prevention unit of the laminating apparatus applies vibration to the stacking unit.

  According to the secondary battery electrode laminate manufacturing method according to claim 3 of the present invention and the secondary battery electrode laminate preparation apparatus according to claim 5 of the present invention, the above-described claim 1 and the specific contents specified above. Thus, the operation of the present invention according to No. 3 can be reliably exhibited.

  According to the present invention, when a positive electrode plate sheet and a negative electrode plate having the opposite polarity are laminated, a method for producing an electrode laminate for a secondary battery capable of efficiently laminating according to specified dimensions and in a short time, and A creation device can be provided.

It is a schematic side view which shows the electrode laminated body preparation apparatus for secondary batteries which concerns on one Embodiment of this invention including a positive electrode plate sheet preparation apparatus. It is a side view which shows roughly the process in the middle of producing the electrode laminated body for secondary batteries using the integration | stacking apparatus of the electrode laminated body preparation apparatus for secondary batteries which concerns on one Embodiment of this invention. It is a front view which shows the integrated device shown in FIG. 2 from the III-III direction. It is a top view which shows the state just before preparation of the positive electrode sheet produced with the positive electrode sheet production apparatus shown in FIG. It is a top view which shows the positive electrode plate sheet | seat produced by cut | disconnecting with the cutting device of this embodiment. FIG. 6 is a side view schematically showing a state after the positive electrode plate sheet and the negative electrode plate shown in FIG. 5 are stacked using the integration device of the secondary battery electrode laminate manufacturing apparatus shown in FIG. 2. It is the top view which divided and showed the electrode laminated body for secondary batteries of the state integrated | stacked by the integration | stacking apparatus shown in FIG. 6 about both a negative electrode plate and a positive electrode plate sheet | seat.

  Hereinafter, a method and apparatus for producing an electrode laminate for a secondary battery according to an embodiment of the present invention will be described based on the drawings. FIG. 1 is a side view showing an overall configuration of a secondary battery electrode laminate forming apparatus for use in a secondary battery electrode laminate producing method according to an embodiment of the present invention.

  A secondary battery electrode laminate production apparatus 1 used in the secondary battery electrode laminate production method according to the present invention includes a positive electrode plate supply device 10, a positive electrode plate transport device 20, a separator supply device 30, and a sandwiching device. The apparatus 40 includes a welding apparatus 50, a cutting apparatus 60, an inspection apparatus 70, a defective product discharge apparatus 80, and an accumulation apparatus 200. In the present embodiment, the positive plate sheet forming apparatus includes the positive plate supplying apparatus 10 and the cutting apparatus 60.

  The positive electrode plate supply device 10 is for supplying positive plates one by one to the positive electrode plate conveyance device 20 one by one at regular time intervals, and the positive electrode plate conveyance device 20 is supplied from the positive electrode plate supply device 10. The positive plates are conveyed so that the positive plates are separated from each other by a predetermined distance, and supplied to the sandwiching device 40 one by one.

  The separator supply device 30 is for supplying two continuous separators 121 and 122 (120) wound in a roll shape, and has an upper separator supply device 30U and a lower separator supply device 30L. ing. A tension control device (not shown) is provided on each of the upper side and the lower side, and the upper-side separator 121 and the lower-side separator 122 are inserted while holding the positive electrode plate 110 (see FIG. 5) with the clamping device 40. When superposing, the positive electrode plate sheet 100 (see FIG. 5) is prepared in a state in which the separator 120 does not cause wrinkles, slack, elongation, or the like so as to always maintain a constant tension.

  The sandwiching device 40 separates the positive electrode plate 110 conveyed from the positive electrode plate conveyance device 20 between the continuous separators 121 and 122 respectively supplied from the upper-stage separator supply device 30U and the lower-stage separator supply device 30L with a predetermined interval. However, it is for sandwiching sequentially. The sandwiching device 40 sandwiches the positive electrode plate 110 between an upper separator 121 supplied from obliquely above and a lower separator 122 supplied obliquely from below under predetermined arrangement conditions. .

  The welding device 50 is for welding the upper and lower two separators 120 with the positive electrode plate 110 sandwiched therebetween so that the positive electrode plate 110 does not protrude from the separator 120, and is around the positive electrode plate 110. The overlapping portion between the separators is partially welded at a predetermined interval.

  The cutting device 60 is a device that cuts the continuous positive electrode sheet 100 in the width direction. Although not shown here, the cutting device 60 includes a cutter that cuts the separator 120, a cutter cylinder that holds the cutter, and a cutter receiving cylinder that receives the cutter. The cutter is configured to cut an overlapping portion 120a (see FIG. 4) of two separators 120 located between adjacent positive electrode plates in a width direction orthogonal to the traveling direction of the separators 120.

  The inspection device 70 is used to determine the quality of the positive electrode sheet 100 cut by the cutting device 60. When the inspection device 70 determines that the positive electrode sheet is defective by inspection, the defective device discharge device 80 to remove.

  The stacking apparatus 200 is for making the electrode stack 300 by alternately stacking the positive electrode sheet 100 that has passed as a non-defective product by the inspection apparatus 70 and the negative electrode 150 so as not to deviate from each other.

  Next, a specific configuration of the integrated device 200 that forms an important part of the electrode stack manufacturing apparatus 1 for a secondary battery according to the present embodiment will be described in more detail based on the drawings. FIG. 2 is a side view schematically showing a process in the middle of producing an electrode laminate for a secondary battery using the integration device of the electrode laminate production apparatus for a secondary battery according to an embodiment of the present invention. FIG. 3 is a front view showing the stacking apparatus shown in FIG. 2 from the III-III direction.

  The stacking apparatus 200 includes a stacking unit 210 and a shift prevention unit 220. The stacking unit 210 is cut by the cutting device 60 and then continuously fed at predetermined intervals, and a plurality of positive plate sheets 100 and a plurality of outer diameter dimensions that are substantially the same as the outer dimensions of the positive plate sheets. In this embodiment, the electrode plates, that is, the negative electrode plates 150 are alternately stacked one by one. Further, the misalignment prevention unit 220 is for making the misalignment between the positive electrode plate sheet 100 and the negative electrode plate 150 that are alternately stacked by the stacking unit 210 within a desired range.

  The stacking unit 210 of the stacking apparatus 200 includes a housing 201 that houses not only the components of the stacking unit 210 but also a shift prevention unit 220 therein, and a support substrate 215 that is housed in the housing and supports the lowermost layer of the electrode stack 300. A first side plate 211 rising in a direction perpendicular to the upper surface of the support substrate 215 from the first edge 215a (see FIG. 3) of the support substrate 215, and a second edge 215b of the support substrate 215 ( 3) and a second side plate 212 that rises in a direction perpendicular to the upper surface of the support substrate 215 and has a right angle with the first side plate 211. The support substrate 215 and the first and second side plates 211 and 212 are integrated, and along a guide (not shown) provided extending in the vertical direction of the housing 201, a slider (see FIG. It moves up and down with a predetermined stroke via the (not shown). The support substrate 215 is made of a smooth and slippery material. The negative electrode plate 150 and the positive electrode plate sheet 100 stacked on the upper surface of the support substrate 215 are alternately stacked on the support substrate 215 by the shift prevention unit 220. The edge of each negative electrode plate 150 and the edge of each positive electrode plate sheet 100 corresponding to the first side plate 211 and the second side plate 212 are slid on the support substrate by the applied vibration, and the edges extend in the whole edge extending direction. It is easy to hit across. Further, the lower surface of the support substrate 215 also has a small frictional resistance, so that the eccentric cam 221 can rotate smoothly without the frictional resistance of the peripheral surface of the eccentric cam 221 of the displacement prevention unit 220 described later.

  The casing 201 has a box shape with an opening 201a on the upper side, and as described above, the support substrate 215 and the first and second side plates 211 and 212 are accommodated therein, and Each component constituting the shift preventing portion 220 is accommodated between the bottom plate 201b and the support substrate 215. The opening 201a of the housing 201 has a large opening on the side (the right side in FIG. 2) into which the negative electrode plate 150 and the positive electrode sheet 100 enter. The bottom plate 201b of the housing 201 is inclined by an angle α with respect to the horizontal plane when viewed from the direction of FIG. 2, and is inclined by an angle β with respect to the horizontal plane when viewed from the direction of FIG. Further, since the support substrate 215 is provided so as to be always parallel to the bottom plate 201b of the housing 201, the support substrate 215 is also tilted three-dimensionally with respect to the horizontal plane at the same angle as the bottom plate 201b of the housing 201. ing. That is, the support substrate 215 is also inclined by an angle α with respect to the horizontal plane when viewed from the direction of FIG. 2, and is inclined by an angle β with respect to the horizontal plane when viewed from the direction of FIG.

  On one side of the stacking unit 210, that is, on the side facing the first side plate 211 with the support substrate 215 interposed therebetween as shown in FIG. 2, a negative plate transport belt 250 is disposed therebelow. The leading end side 251 of the negative electrode plate conveying belt 250 is positioned such that the extension line in the belt traveling direction just hits the upper side of the first side plate 211, and the negative electrode plate 150 is conveyed near the base end side of the negative electrode plate conveying belt 250. A negative electrode plate supply device 260 is provided that continuously supplies a predetermined number of sheets to the belt 250 with a slight time interval (mounts on the belt). The positive electrode sheet conveying belt 270 is disposed in the vicinity of the upper side of the base end side of the negative electrode conveying belt 250. The positive electrode sheet conveying belt 270 is located at the downstream end of the path for conveying the positive electrode sheet 100 as an acceptable product that is not discharged by the defective product discharging device 80. Further, a photoelectric switch 275 is provided slightly above the positive electrode sheet conveyance belt 270, and one sheet from the positive electrode sheet conveyance belt 270 is placed on one negative electrode plate 150 that is carried on the negative electrode conveyance belt 250. It is always detected whether or not the positive electrode sheet 100 is supplied so as to be surely stacked.

  Further, as described above, the shift prevention unit 220 of the stacking apparatus 200 is provided between the bottom plate 201b of the housing 201 of the stacking unit 210 and the support substrate 215, and the eccentric cam 221 and the cam shaft that rotates the eccentric cam 221. 222 and a drive motor (not shown here) directly connected to the camshaft 222. A part of the peripheral surface 221a of the eccentric cam 221 (see FIG. 3) is always in contact with the support substrate 215, and the deviation prevention unit 220 of the stacking device 200 supports the stacking unit 220 while the eccentric cam 221 rotates. Vibration is applied to the substrate 215 and the first and second side plates 211 and 212 integrated therewith via a reciprocating mechanism (not shown) composed of the guide and the slider described above.

  As described above, the structure of the stacking unit 210 tilted three-dimensionally and the micro-reciprocal vibration of the stacking unit 210 generated by the stacking unit 210 and the shift prevention unit 220 of the stacking device 200 cooperate with each other, so 150 and each positive electrode plate sheet 100 are sequentially stacked on the support substrate 215 of the stacking unit 210, and each negative electrode plate 150 and the electrode stack 300 of each positive electrode plate sheet 100 (the fully stacked electrode stack of FIG. 6). First side edges in the stacking direction of the body 300) abut against the first side plate 211 over the entire edge extending direction, and the second side in the stacking direction of each positive electrode plate sheet 100 and each negative electrode plate 150. The edges respectively abut against the second side plate 212 over the entire edge extending direction.

  Then, the preparation method of the electrode laminated body for secondary batteries which concerns on this embodiment is demonstrated in order from the preparation method of the positive electrode sheet 100. FIG. First, as shown in FIG. 1, the first separator 121 and the second separator 122 are continuously sent out via the separator supply device 30. At the same time, the positive plate 110 is supplied to the positive plate transport device 20 via the positive plate supply device 10, and the positive plate 110 is supplied to the first separator 121 and the second separator 122 via the positive plate transport device 20. Transport to between. In addition, the width direction of the positive electrode plate 110 with respect to the length in the width direction perpendicular to the separator traveling direction (hereinafter simply referred to as “the length in the width direction”) than the first separator 121 and the second separator 122. The length is slightly shorter.

  Then, the positive electrode plate 110 is sandwiched between the first separator 121 and the second separator 122 via the sandwiching device 40. When sandwiching the positive electrode plate 110 between the first separator 121 and the second separator 122, the positive electrode plate 110 is sandwiched at a predetermined interval in the separator delivery direction.

  Subsequently, as shown in FIG. 4, the overlapping portions of the separators on both sides in the width direction corresponding to the separator width direction of each positive electrode plate 110 sandwiched between the two separators 120 are separated by the welding device 50. The separator 120 is partially welded at a predetermined interval in the width direction of the separator 120 and is partially welded at a predetermined interval in the width direction of the separator 120.

  Next, although not shown here, a cutter cylinder having a structure provided with a saw blade-shaped cutter having a predetermined pitch, a separator press disposed in the front and rear in the circumferential direction of the cutter, and an urging means for supporting the separator press. Then, the overlapping portion 120a of the separator 120 is cut using the separator cutting device 60 formed of a cutter receiving cylinder having a structure in which a cutter receiver made of an elastic body having a predetermined hardness is provided.

  Specifically, two continuous separators 120 fed out continuously are sandwiched between the separator presser of the cutter cylinder and the cutter receiver of the cutter receiver cylinder, and are arranged at predetermined intervals in the running direction of the separator. The overlapping portion 120a of the separator 120 positioned between the positive electrode plates arranged in (1) is cut by a saw blade cutter along the predetermined cutting line 120b (see the two-dot chain line in FIG. 4). In this way, the positive electrode plate sheet 100 is created in which the front and back surfaces of the positive electrode plate 110 are sandwiched between the two separators 121 and 122 and the periphery is surrounded by the overlapping portion of the separator 120.

  Below, the state before and behind the cutting | disconnection apparatus 60 of the positive electrode plate sheet 100 produced in this way is demonstrated, comparing both based on drawing. FIG. 4 is a plan view showing a state immediately before the production of the positive electrode sheet produced by the positive electrode sheet production device shown in FIG. 1, that is, a state immediately before the separator overlapping portion between the positive electrodes is cut by the cutting device. is there. FIG. 5 is a plan view of the positive electrode sheet produced by cutting with the cutting device of the present embodiment, that is, a plan view immediately after cutting the overlapping portion of the separator between the positive electrode plates with the cutting device. is there.

  As shown in FIG. 4, the state of the positive electrode sheet 100 created by the positive electrode sheet production apparatus according to the present embodiment before the separator is cut is two sheets with the adjacent positive electrodes 110 separated by a predetermined interval. After being sandwiched between the separators 121 and 122, rectangular welded portions 131 and 132 whose longitudinal direction is the width direction of the separator 120 are formed in the extending direction of the overlapping portion 120 a of the separators between the adjacent positive electrode plates 110. A plurality of the overlapping portions 120a of the separator 120 are formed in parallel with a space therebetween. Similar welded portions 135 and 136 are also formed on the overlapping portions 120 a on both sides in the width direction of the separator 120. Then, the overlapping portion 120a of the separator 120 between the welded portions 130 (131, 132) is cut by the saw blade cutter of the cutting device 60 along the cutting line 120b shown by the two-dot chain line in FIG. 4 as described above. Then, each of the positive electrode plate sheets 100 shown in FIG. 5 having two edge portions 120e facing each other of the positive electrode plate sheet 100 is formed with jagged cutting portions 120e having extremely small pitches corresponding to the blades of the saw blade cutter. To do.

  Next, in the present embodiment, the secondary battery electrode laminate 300 (see FIG. 6) is created by the following procedure using the above-described integrated device 200. FIG. 2 is a side view schematically showing a process in the middle of producing a secondary battery electrode laminate using the integration device 200 of the secondary battery electrode laminate production apparatus 1 according to an embodiment of the present invention. is there. In describing this process, in the present embodiment, as described above, the positive electrode sheet conveying belt 270 and the negative electrode conveying belt 250 are arranged in the same direction (right direction in the drawing) with respect to the stacking apparatus 200. .

  In the present embodiment, as shown in FIG. 2, a plurality of negative plates 150 having an outer diameter that is substantially the same as the outer dimensions of the positive plate 100 are supplied from the negative plate supply device 260 one by one. Then, the negative electrode plate 150 supplied from the negative electrode plate supply device 260 is placed on the negative electrode plate conveyance belt 250. Further, a plurality of positive plate sheets 100 created by the above-described steps for producing a positive plate sheet are continuously conveyed by a positive plate sheet conveying belt 270 at a predetermined interval.

  Then, the positive plate sheets 100 falling from the leading end side in the conveyance direction of the positive plate sheet conveyance belt 270 are stacked one by one on the corresponding negative electrode plate 150. At this time, the photoelectric switch 275 always detects whether or not there is an overlay omission. In the vicinity of the positive electrode sheet conveyance belt in FIG. 2, about one third of the negative electrode plate 150 on the negative electrode conveyance belt 250 in the conveyance direction advance side is about one third. The state just before the overlap and other portions overlap each other is shown.

  Further, on the left side in FIG. 2 (on the downstream side of the negative electrode plate conveying belt 250) adjacent to the negative electrode plate 150 and the positive electrode plate sheet 100 that are in the middle of overlapping, the front end in the conveying direction is partially from the end of the negative electrode plate conveying belt 250 The protruding negative electrode plate 150 and positive electrode plate sheet 100 are shown completely overlapped with each other. Further, the stacking unit 210 of the stacking apparatus 200 has two sets of negative plates 150 that protrude from the tip of the negative plate transport belt 250 in the direction of the arrow slightly diagonally to the lower left in the drawing and hit the first side plate 211 and The positive electrode plate sheet 100 is shown in FIG. 2, and in addition to this, three sets of negative electrode plates 150 dropped from this state in the direction indicated by the downward arrow in the figure and stacked on the support substrate 215 of the stacking unit 210. And the positive electrode plate sheet 100 is shown.

  As shown in FIGS. 2 and 3, the integrated unit 210 includes a support substrate 215 that supports the lowermost layer of the electrode stack 300, and a first edge 215 a of the support substrate 215 in a direction perpendicular to the upper surface of the support substrate 215. The first side plate 211 that has stood up and the second edge portion 215b of the support substrate 215 that has risen in a direction perpendicular to the upper surface of the support substrate 215, and the angle between the first side plate 211 and the first side plate 211 has become a right angle. The side plate 212 is provided. As described above, the support substrate 215 is also inclined by an angle α with respect to the horizontal plane when viewed from the direction of FIG. 2 and is inclined by an angle β with respect to the horizontal plane when viewed from the direction of FIG. In addition to the arrangement configuration as described above, the shift prevention unit 220 performs the shift prevention operation so as to vibrate the stacking unit 210. One side of the first side edge 211 of each electrode plate 300 of each negative electrode plate 150 and each positive electrode plate sheet 100 sequentially laminated on the support substrate 215 abuts against the first side plate 211 in the entire edge extending direction. At the same time, one side of the second side edge 212 of the electrode stack 300 abuts against the second side plate 212 in the entire edge extending direction.

  In this embodiment, the displacement prevention operation is performed in accordance with the stacking operation so that the mutual displacement between the positive electrode plate sheet 100 and the negative electrode plate 150 is within a desired range. Instead, the shift prevention is performed after the stacking operation is performed. You may make it perform operation | movement.

  In this way, the negative electrode plate 150 and the positive electrode plate sheet 100 that are overlapped with each other are sequentially accumulated in the accumulating unit 210, and the deviation preventing device 220 continues to apply vibration to the accumulating unit 210. Then, after a predetermined number of negative electrode plates 150 and positive electrode plate sheets 100 are alternately stacked on the stacking unit 210, only one negative electrode plate 150 is stacked on the uppermost portion to complete the electrode stack 300. That is, when n is a natural number, the electrode laminate 300 of n + 1 negative electrode plates 150 and n positive electrode plate sheets 100 is completed with the upper and lower surfaces thereof being the negative electrode plates 150.

  Next, although not shown in detail in the present embodiment, the stacking apparatus 200 shown in FIGS. 2, 3 and 6 is arranged in a direction orthogonal to the extending direction of the negative electrode plate conveying belt 250, that is, in FIG. Two are arranged in parallel in a direction perpendicular to the paper surface, and when the accumulation operation in one of the accumulation devices 200 is completed, the two are moved away from the negative electrode plate conveyor belt 250 along the direction orthogonal to the paper surface of FIG. It is preferable to shift it onto a conveyor belt of an electrode laminate 300 (not shown in FIG. 6) with a handling robot or the like. At this time, a part of the electrode laminate 300 is taped using a robot or the like so that the positive electrode sheet 100 and the negative electrode plate 150 of the electrode laminate 300 do not shift before or during handling. It is good to let it.

  Below, the effect | action of the electrode laminated body preparation method and preparation apparatus for secondary batteries which concern on this embodiment is demonstrated in detail. According to the method and apparatus for producing a secondary battery electrode laminate according to the present embodiment, the two strip-shaped separators 121 and 122 wound in a roll are continuously sent out so as to overlap each other. When the two separators 121 and 122 fed out are superposed, the positive electrode plates are sequentially sandwiched between them with a predetermined distance therebetween. Therefore, when the positive electrode plate is accurately positioned and placed on the separator as in the invention disclosed in Patent Document 1, it is not necessary to intermittently stop the separator transport device every time. In other words, since it is not necessary to perform the intermittent feeding operation of the separator, the production efficiency of the positive electrode plate sheet is greatly improved as compared with the prior art, and the positive electrode plate is rapidly stopped and the movement of the positive electrode plate is started suddenly. It avoids the occurrence of deviation on its own conveyor belt and deviation between the separator and the positive electrode plate superimposed thereon.

  In addition, by having the above-described integration device 200, the positive electrode plates 110 and the negative electrode plates 150 covered with the separators 120 are alternately stacked for each positive electrode plate 110, and the stacked positive electrode plate sheets 100 are stacked. The electrode laminate for a secondary battery in which the edge portions of the negative electrode plate 150 and the negative electrode plate 150 coincide with each other and do not deviate from each other can be efficiently produced in a short time according to the specified dimensions. Therefore, as in the invention described in Patent Document 2, a broken line cannot be firmly formed in the folded portion of the separator, so that it does not float up and a wasteful thickness does not occur, and a complicated device for strictly managing the folded position of the separator No structure is required. In addition, since the welding and cutting processes have already been completed, it is possible to immediately move on to the next process.

  In particular, since the cut edge of the positive electrode sheet 100 is cut into a very small pitch saw blade as shown in FIG. 5, the cut edge is the first side plate 211 of the stacking apparatus 200. The displacement prevention unit 220 of the stacking apparatus 200 vibrates the support substrate 215 and the first side plate 211 of the stacking unit 210 when it strikes against each other, thereby stacking each positive plate 100 and the negative plate 150 overlapping this one surface. The first side edge of each direction is firmly in contact with the first side plate 211 over the entire edge extending direction.

  Further, the support substrate 215 is also inclined by an angle α with respect to the horizontal plane when viewed from the direction of FIG. 2, and is inclined by an angle β with respect to the horizontal plane when viewed from the direction of FIG. As described above, since the support substrate 215 and the first and second side plates 211 and 212 integrated with the support substrate 215 are tilted three-dimensionally, the positive electrodes sequentially stacked on the support substrate 215 of the integrated unit 210. One side edge in the stacking direction of the electrode stack 300 of the plate sheet 100 and each negative electrode plate 150 is abutted against the first side plate 211 in the entire edge extending direction, and the other side of the side edges is It can abut against the second side plate 212 orthogonal to the side edge over the entire edge extending direction. As a result, the electrode laminates are arranged such that the deviations of the laminated surfaces of the side edges of the electrode laminate 300 corresponding to the first and second side plates 211 and 212 of the accumulation unit 210 of the accumulation device 200 are within the allowable range in design. Since 300 can be produced, it is possible to produce a large number of secondary batteries excellent in quality according to the design dimensions with increased manufacturing yield after subsequent steps.

  In the case of the present embodiment, the negative plate transport belt 250 and the positive plate sheet transport belt 270 are both located on one side of the stacking apparatus 200 and on the side facing the first side plate 211. Space-saving for the installation of is planned. However, even if the negative plate conveying belt 250 is disposed on one side of the stacking device 200 and the positive electrode sheet conveying belt 270 is disposed on the other side without taking such a form, the operation of the present invention is achieved. It is possible to fully exhibit.

  In the case of the present embodiment, since one positive electrode sheet 100 is superposed on one negative electrode plate 150 on the negative electrode transport belt 250 and then supplied to the stacking device 200, the positive electrode The negative electrode plate 150, which is thinner than the plate sheet 100, can be reliably placed on the stacking unit 210 of the stacking apparatus 200. However, without taking such a form, the negative electrode plate 150 supplied from the negative electrode plate supply device 260 is supplied to the stacking unit 210 of the stacking device 200 via the negative plate transport belt 250, and the positive electrode alternately with this. Even if the positive electrode plate sheet 100 is supplied from the plate sheet transport belt 270 to the stacking unit 210 of the stacking apparatus 200, the effects of the present invention can be sufficiently exerted.

  The shapes, dimensions, numerical values, and materials of the components introduced in the above-described embodiments are merely examples, and various shapes, dimensions, numerical values, and materials are appropriately selected without departing from the scope of the present invention. Needless to say, you can. That is, the secondary battery electrode laminate production apparatus according to the present invention is not realized by being limited to the configuration of the positive electrode sheet production apparatus described above.

  In the present embodiment, one positive electrode sheet is stacked on one negative electrode plate on the negative electrode transport belt, and the stacked negative electrode and positive electrode sheet pairs are sequentially introduced into the stacking unit. A plurality of negative electrode plates and positive electrode plate sheets were alternately laminated. However, even if the negative electrode plate and the positive electrode plate sheet are directly put into the stacking unit one by one and a plurality of these are alternately stacked, a secondary battery electrode laminate can be produced, and the effect of the present invention is sufficiently obtained. It can be demonstrated.

  In the present embodiment, the method and apparatus for producing a secondary battery electrode laminate having a structure in which a positive electrode plate is sandwiched between two separators have been described. Instead, a structure in which a negative electrode plate is sandwiched between two separators. Needless to say, even if the present invention is applied to the method and apparatus for producing an electrode laminate for a secondary battery, the same effect can be obtained.

  Note that the structure of the slip prevention unit is not limited to the cam mechanism as in the above-described embodiment, and vibration generating means that uses the vibration by vibrating the motor itself as the motor rotates can be used. good. Furthermore, vibration generating means such as a buzzer or a bell can be applied.

DESCRIPTION OF SYMBOLS 1 Secondary battery electrode laminated body preparation apparatus 10 Positive electrode plate supply apparatus 20 Positive electrode plate conveying apparatus 30 Separator supply apparatus 30U Upper stage separator supply apparatus 30L Lower stage separator supply apparatus 40 Clamping apparatus 50 Welding apparatus 60 Cutting apparatus 70 Inspection apparatus 80 Defective product discharge device 100 Positive electrode sheet 110 Positive electrode plate 121, 122 (120) Separator 120a Overlapping portion 120b Cutting line 120e Cutting portion 130 (131, 132) Welding portion 135, 136 Welding portion 150 Negative electrode 200 Stacking device 201 Housing 201a opening 201b bottom plate 210 stacking unit 220 displacement prevention unit 211 first side plate 212 second side plate 215 support substrate 215a first edge 215b second edge 221 eccentric cam 221a peripheral surface 222 camshaft 250 negative plate conveyance bell 251 distal side 260 negative plate supply device 270 positive plate sheet conveying belt 275 photoelectric switch 300 electrode stack

Claims (5)

Prepare a first separator and a second separator that are each wound in a roll shape and sent out so as to overlap each other from the state wound in the roll shape,
While the first separator and the second separator are continuously sent out, a positive electrode plate having a length in the width direction perpendicular to the separator running direction is shorter than that of the separator between these separators. Sandwiched at a predetermined interval
The positive electrode plates sandwiched between the two separators are partially welded at both sides in the width direction corresponding to the width direction of the separator and overlapping portions of the separators at a predetermined interval in the running direction of the separator. And partially welding the overlapping portion of the separators between the positive plates in the running direction of the separator at a predetermined interval in the width direction of the separator,
A cutter body provided with a predetermined length of cutter in the circumferential direction at a predetermined position in the longitudinal direction, and the cutter corresponding to the predetermined length in the longitudinal direction at a predetermined position in the circumferential direction to receive the cutter. Prepare a separator cutting device consisting of a cutter cylinder with a cutter holder,
Rotating the cutter cylinder and cutter receiving cylinder of the cutting apparatus so that the circumferential surfaces of the cutter cylinder and cutter receiving cylinder of the cutting apparatus are in the same direction as the traveling direction of the separator,
The two separators that are continuously sent out are arranged side by side at a predetermined interval in the running direction of the separator in a state where the separator is sandwiched between the separator presser of the cutter cylinder and the cutter receiver of the cutter receiver cylinder. By cutting the overlapping part of the separator located between the positive electrode plates with a cutter, a positive electrode sheet is created in which the front and back of the positive electrode plate are sandwiched between two separators and the periphery is surrounded by the overlapping part of the separator And
A plurality of the prepared positive electrode plate sheets are continuously supplied at a predetermined interval, and a plurality of negative electrode plates having the same outer diameter as the outer dimensions of the positive electrode plate sheet are supplied. A secondary battery that performs a stacking operation for alternately stacking sheets one by one, and performs a shift prevention operation in accordance with the stacking operation so that a shift between the positive electrode plate sheet and the negative electrode plate is within a desired range. Electrode laminate manufacturing method.   2. The method for producing an electrode laminate for a secondary battery according to claim 1, wherein instead of performing the integration operation and the shift prevention operation together, the shift prevention operation is performed after the integration operation is performed. Method for producing electrode laminate for secondary battery. The positive electrode plate sheet and the negative electrode plate have a rectangular shape, and a support substrate that supports the bottom surface of the electrode stack, and a first edge of the support substrate that rises in a direction perpendicular to the upper surface of the support substrate. The first side plate has a second side plate that rises in a direction perpendicular to the upper surface of the support substrate from the second edge portion of the support substrate, and that the angle between the first side plate and the first side plate is a right angle. While performing the integration operation using the integration unit,
The first side edge in the stacking direction of each positive electrode sheet and the stack of each negative electrode plate sequentially stacked on the support substrate of the integrated unit abuts the first side plate over the entire edge extending direction, A second side edge in the stacking direction of each positive electrode plate sheet and each negative plate stack sequentially stacked on the support substrate of the stacking unit abuts the second side plate over the entire edge extending direction. 3. The method for producing an electrode laminate for a secondary battery according to claim 1, wherein the deviation prevention operation is performed by applying vibration to the laminated portion. A device for producing a positive electrode plate sheet used for a secondary battery having a structure in which a positive electrode plate and a negative electrode plate are laminated while being insulated from each other via a separator made of an insulating sheet,
A separator supply device for feeding the continuous first separator and the second separator wound in a roll shape so as to overlap each other from the state wound in the roll shape;
A positive electrode plate supply device that supplies a positive electrode plate whose length in the width direction perpendicular to the separator travel direction is shorter than that of the first separator and the second separator;
A positive plate transport device for transporting the positive plate supplied by the positive plate supply device to a predetermined position;
A sandwiching device for sequentially sandwiching the positive electrode plate conveyed by the positive electrode plate conveyance device so as to be separated by a predetermined interval in the separator delivery direction between the two fed-out separators;
The positive electrode plates sandwiched between the two separators are partially welded at both sides in the width direction corresponding to the width direction of the separator and overlapping portions of the separators at a predetermined interval in the running direction of the separator. And a welding device that partially welds the overlapping portion of the separators between the positive plates in the running direction of the separator at a predetermined interval in the width direction of the separator;
A cutter body provided with a predetermined length of cutter in the circumferential direction at a predetermined position in the longitudinal direction, and the cutter corresponding to the predetermined length in the longitudinal direction at a predetermined position in the circumferential direction to receive the cutter. A separator cutting apparatus comprising a cutter receiving cylinder provided with a cutter receiver, wherein the separators are positioned between the two separators and arranged between the positive plates arranged at predetermined intervals in the running direction. A cutting device for cutting the stacked separators so as to bisect the mating portions,
A plurality of positive plate sheets that are cut by the cutting device and fed continuously at a predetermined interval, and a plurality of negative plate plates that have substantially the same outer diameter as the outer dimensions of the positive plate sheet are alternately placed one by one. And a stacking device having a stacking unit that accumulates on the substrate and a misalignment prevention unit that keeps the misalignment between the positive electrode plate sheet and the negative electrode plate within a desired range. apparatus. The positive electrode sheet and the negative electrode plate are rectangular, and the stacking unit of the stacking device includes a support substrate that supports a bottom surface of the electrode stack, and a top surface of the support substrate from a first edge of the support substrate. The first side plate rising in the vertical direction with respect to the upper surface of the support substrate from the second edge portion of the support substrate, and the angle between the first side plate and the first side plate is a right angle Having a second side plate,
The first side edge in the stacking direction of each positive electrode sheet and the stack of each negative electrode plate sequentially stacked on the support substrate of the integrated unit abuts the first side plate over the entire edge extending direction, A second side edge in the stacking direction of each positive electrode plate sheet and each negative electrode plate stack sequentially stacked on the support substrate of the stacking unit abuts on the second side plate in the entire edge extending direction. The apparatus for creating an electrode laminate for a secondary battery according to claim 4, wherein the misalignment prevention unit of the stacking device applies vibration to the stacking unit.

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