JP2009158317A - Method and apparatus for manufacturing group of electrodes for square battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the cycle time for manufacturing a group of electrodes. <P>SOLUTION: A method for manufacturing a group of electrodes for a square battery is provided which superposes positive electrode plates and negative electrode plates alternately so that separators are interposed between the positive electrode plates 4 and the negative electrode plates 5. According to the method, a plurality of guide plates 13a are arranged zigzag in the vertical direction, and a separator continuity 3 is inserted between a row of guide plates 13a and another row thereof. Both rows of the guide plates 13a are made to cross each other horizontally to fold the continuity 3 zigzag. The positive electrode plates 4 and the negative electrode plates 5 are inserted alternately in respective valleys of the zigzag-folded continuity 3, and the guide plates 13a... are pulled out of the valleys of the continuity 3. Afterward, the continuity 3 is pressed in the zigzag direction to be flattened. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for manufacturing an electrode plate group of a rectangular battery used for a vehicle, an electric device or the like.

An electrode plate group in a battery such as a lithium ion secondary battery is formed by alternately stacking positive and negative electrodes so that a separator is interposed between positive and negative electrodes. The typical manufacturing method for this electrode plate group includes: (1) Stacking, in which separators, positive plates, and negative plates are each formed into a sheet, and are alternately stacked so that separators are interposed between the positive plates and the negative plates. Method (for example, refer to Patent Document 5), (2) A separator, a positive electrode plate, and a negative electrode plate formed in a continuous manner are overlapped so that the separator is interposed between the positive electrode plate and the negative electrode plate, and wound in a spiral shape. (3) Zigzag-folding the separator continuous body or the superposed body of the separator continuous body and the negative electrode plate continuous body, in each valley groove There is a zigzag stack system (see, for example, Patent Documents 1, 2, 3, and 4) in which both of a sheet-like positive electrode plate and a negative electrode plate or a positive electrode plate are inserted and pressed flat.
Japanese Patent Laid-Open No. 2004-22449 JP-A-1-122572 Japanese Patent Laid-Open No. 1-100871 JP 2006-190531 A JP 2002-329530 A (FIGS. 4 and 5) JP 2000-223109 A JP-A-7-6783

  In the stacking method of (1), it is difficult to ensure the positional accuracy of the positive and negative electrode plates and the separator, and there is a possibility that a short circuit occurs between the positive and negative electrodes when the positions are shifted. If precise positioning is performed in order to prevent this short circuit, it causes a tact time (production rate per electrode plate group) to be delayed, and there is a problem that the productivity of the electrode plate group and hence the battery is lowered. .

  Further, the winding method (2) has a problem that if the number of windings of the electrode plate group is large, a dead space is formed between the electrode plate group and the corner of the battery case, and the electric capacity is reduced.

  The zigzag stack method of (3) above can increase the positional accuracy of positive and negative electrode plates and separators and can shorten the tact time as compared with the stacking method of (1). Compared with the method, there is an advantage that the dead space can be reduced and the electric capacity can be increased.

  However, according to the conventional zigzag stack method, the separator is zigzag folded by sandwiching a continuous separator between a pair of rollers and reciprocating the pair of rollers in the horizontal direction. Since the positive and negative electrode plates are alternately placed on the separator every time the pair of rollers make one reciprocation, the tact time is slow and it is difficult to increase the productivity.

  Moreover, in the thing of patent document 2, it is trying to form an electrode group by sandwiching a continuous separator in a zigzag shape between a hard positive electrode plate and a negative electrode plate held at regular intervals, respectively. Therefore, a large tension (load) acts on the separator and the separator is easily broken, and when the electrode plate is thin and soft, there is a problem that the manufacture is difficult.

  Furthermore, in the one described in Patent Document 3, a continuous separator is placed on a sawtooth female mold, and a male mold having a shape matching one groove is sequentially inserted into each groove of the female mold. A zigzag separator is then formed, and then positive and negative plates are alternately inserted into each trough of the separator, and finally the separator is pressed together with the positive and negative plates to flatten the electrode plate group Because it is intended to manufacture, the tact time is long and it is difficult to increase productivity.

  And in the thing of patent document 4, what sandwiched the continuous separator between the continuous positive electrode plate and the negative electrode plate was pressed in a zigzag shape with a sawtooth male and female mold, and this zigzag overlap Since the electrode plate group is manufactured by pressing the body, there is a problem that the zigzag folding of the electrode plate group becomes fine and the electric capacity is reduced. Moreover, since the location which a positive electrode plates and negative electrode plates contact will arise, there also exists a problem that the useless part which does not participate in electric power generation arises in a positive electrode plate and a negative electrode plate.

  Accordingly, the present invention has been made in consideration of the above circumstances, and provides a method and an apparatus capable of manufacturing an electrode plate group having a large capacitance using a relatively thin and soft electrode plate in a short tact time. With the goal. It is another object of the present invention to provide a method and apparatus capable of manufacturing an electrode plate group suitable for a prismatic battery with a short tact time.

  In order to solve the above problems, the present invention employs the following configuration.

  That is, the invention according to claim 1 is a rectangular battery electrode plate group in which the positive electrode plate (4) and the negative electrode plate (5) are alternately overlapped so that the separator is interposed between the positive and negative electrode plates (4, 5). In the manufacturing method, a plurality of guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) are arranged in a zigzag shape in the vertical direction, and the guide plates (13a, 13b, 13c). , 13d, 13e, 13f, 13g, 13h, 13i, 13j), the separator continuous body (3) is inserted between one row and the other row, and the guide plates (13a, 13b, 13c, 13d) are inserted. , 13e, 13f, 13g, 13h, 13i, 13j) by crossing the continuum (3) in a horizontal direction between the rows while zigzag-folding the continuum (3). The positive plates (4) and the negative plates (5) are alternately inserted into the troughs (3a), and the guide plates (13a, 13b, 13c) are inserted into the troughs (3a) of the continuum (3). , 13d, 13e, 13f, 13g, 13h, 13i, 13j), and then, pressing the continuum (3) in a zigzag direction to make it flat (2) ) Manufacturing method.

  Further, the invention according to claim 2 is a method for producing a rectangular battery electrode plate group in which the positive electrode plate (4) and the negative electrode plate are alternately overlapped so that the separator is interposed between the positive and negative electrode plates (4, 5). , A plurality of guide plates (13a, 13b, 13c, 13d, 13e, 13f) are arranged in a zigzag shape in the vertical direction, and one row of the guide plates (13a, 13b, 13c, 13d, 13e, 13f). Between the first row and the other row, a superimposed body (23) sandwiching the continuous body (24) of the negative electrode plate with the continuous body (3, 3) of the two strips is inserted, and the guide plates (13a, 13b) are inserted. , 13c, 13d, 13e, and 13f) are crossed in the horizontal direction between the rows, zigzag-folding the superposed body (23), and each valley groove (23a) of the zigzag-folded superposed body (23). Insert the positive electrode plate (4) into the inside. Then, the guide plates (13a, 13b, 13c, 13d, 13e, 13f) are removed from the valleys (23a) of the superposed body (23), and then the superposed body (23) is moved in a zigzag direction. It is a manufacturing method of the electrode group (22) for square batteries characterized by pressing and flattening.

  As described in claim 3, in the method for manufacturing a rectangular battery electrode group according to claim 1 or 2, each trough (3a, 23a) of the continuum (3) or the superimposed body (23). ) Insert both the positive plate (4) and the negative plate (5) or the positive plate (4) into the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i). , 13j) may be pressed in the length direction.

  As described in claim 4, in the method for manufacturing a rectangular battery electrode group according to claim 1 or 2, each valley groove (3 a, 23 a) of the continuum (3) or the superimposed body (23). ) After extracting the guide plate from the inside, before pressing the continuum (3) or the superimposed body (23) flatly, the positive plate (4) and the negative plate (5) 3a, 23a) may be further pushed into.

  According to a fifth aspect of the present invention, in the method for manufacturing the rectangular battery electrode group according to the first or second aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i). , 13j) may be formed on an inclined plate inclined to the tip on the crossing side.

  According to a sixth aspect of the present invention, in the method of manufacturing the rectangular battery electrode group according to the first or second aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i , 13j), a rotatable roller (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j) may be attached.

  According to a seventh aspect of the present invention, in the method for manufacturing the rectangular battery electrode group according to the sixth aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) are provided. ) Between the rows, the continuous body (3) or the superposed body (23) from the surface of the rollers (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j). You may make it discharge air toward.

  As described in claim 8, in the method of manufacturing a rectangular battery electrode group according to claim 6, the rollers (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j) And at least one of the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) on the surface in contact with the continuous body (3) or the superposed body (23). You may make it form.

  Further, the invention according to claim 9 is a rectangular battery electrode plate group in which the positive electrode plate (4) and the negative electrode plate (5) are alternately overlapped so that the separator is interposed between the positive and negative electrode plates (4, 5). Are arranged in a zigzag shape in the vertical direction, the positive electrode plate (4) is placed on one row, the negative electrode plate (5) is placed on the other row, and between one row and the other row When the separator continuum (3) is inserted into the zigzag folds, the continuum (3) is zigzag-folded so as to cross between the rows in the horizontal direction. A plurality of guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) in which the positive electrode plate (4) and the negative electrode plate (5) are alternately inserted into the trough (3a). ) And the guide plate (3a) from within the valley (3a) of the continuum (3). 3a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j), when the positive plate (4) and the negative plate (5) are held in the troughs (3a). An electrode plate group for a rectangular battery, comprising electrode plate holding means (14, 14, 15, 15) and pressing means (18) for pressing the continuum (3) in a zigzag direction to make it flat. It is a manufacturing apparatus.

  The invention according to claim 10 is a rectangular battery electrode plate group in which the positive electrode plate (4) and the negative electrode plate (5) are alternately overlapped so that the separator is interposed between the positive and negative electrode plates (4, 5). In the manufacturing apparatus, the vertical plate is arranged in a zigzag shape, the positive electrode plate (4) is placed on one row and the other row, and two strips of the separator are placed between the one row and the other row. When the superposed body (23) sandwiching the negative electrode plate continuum (24) is inserted in (3, 3), the superposed body (23) is zigzag-folded so as to intersect horizontally between the rows. In addition, a plurality of guide plates (13a, 13b, 13c, 13d, 13e, 13f) for inserting the positive electrode plate (4) into the valley grooves (23a) of the zigzag folded superposition body (23), The guide plate (13a) from within each trough (23a) of the superimposed body (23). 13b, 13c, 13d, 13e, and 13f), the electrode plate holding means (14, 14, 15, 15) for holding the positive electrode plate (4) in each of the troughs (23a), and the overlapping It is an apparatus for manufacturing a rectangular battery electrode plate group, comprising press means (18) for pressing the body (23) in a zigzag direction to make it flat.

  As described in claim 11, in the method for manufacturing a rectangular battery electrode group according to claim 9 or 10, each valley groove (3 a, 23 a) of the continuum (3) or the superimposed body (23). And a stopper (16, 17) for pressing both the positive electrode plate (4) and the negative electrode plate (5) inserted into the guide plate or the positive electrode plate (4) in the length direction of the guide plate. can do.

  As described in claim 12, in the manufacturing apparatus for the rectangular battery electrode group according to claim 9 or 10, each trough (3a, 23a) of the continuum (3) or the superposed body (23). ) After the guide plate (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) is removed from the inside, the continuous body (3) or the superposed body (23) is pressed flatly. Prior to this, the positive plate (4) and the negative plate (5) may be provided with push members (14, 15) for further pushing the valley plates (3a, 23a).

  According to a thirteenth aspect of the present invention, in the apparatus for manufacturing a rectangular battery electrode group according to the ninth or tenth aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i). , 13j) can be formed on an inclined plate inclined to the tip of the crossing side.

  According to a fourteenth aspect of the present invention, in the manufacturing apparatus for the rectangular battery electrode group according to the ninth or tenth aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i). , 13j), a rotatable roller (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j) may be attached.

  According to a fifteenth aspect of the present invention, in the apparatus for manufacturing a rectangular battery electrode plate group according to the fourteenth aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j). ), The air is discharged from the surface of the rollers (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j) toward the continuum or the superimposed body. The discharge hole to be provided may be provided in the roller.

  As described in claim 16, in the manufacturing apparatus of the rectangular battery electrode plate group according to claim 14, the roller (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j). And at least one of the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) on the surface in contact with the continuous body (3) or the superposed body (23). Can be formed.

  According to the first aspect of the invention, the rectangular battery electrode plate group in which the positive electrode plate (4) and the negative electrode plate (5) are alternately overlapped so that the separator is interposed between the positive and negative electrode plates (4, 5). In the manufacturing method, a plurality of guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) are arranged in a zigzag shape in the vertical direction, and the guide plates (13a, 13b, 13c). , 13d, 13e, 13f, 13g, 13h, 13i, 13j), the separator continuous body (3) is inserted between one row and the other row, and the guide plates (13a, 13b, 13c, 13d) are inserted. , 13e, 13f, 13g, 13h, 13i, 13j) by crossing the continuum (3) in a zigzag manner by horizontally intersecting the rows, and each valley of the zigzag folded continuum (3). The positive plates (4) and the negative plates (5) are alternately inserted into (3a), and the guide plates (13a, 13b, 13c, 13d) are inserted from the valleys (3a) of the continuum (3). , 13e, 13f, 13g, 13h, 13i, 13j), and then pressing the continuum (3) in a zigzag direction to make it flat, the rectangular battery electrode plate group (2) Since it is a manufacturing method, the required number of troughs (3a) for one electrode plate group (2) can be simultaneously formed in the separator continuum (3), and the tact time can be greatly reduced. it can. Further, the separator is zigzag folded by crossing the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) between the rows, so that a deep groove (3a) is formed. Therefore, the positive electrode plate (4) and the negative electrode plate (5) can be enlarged to form an electrode plate group (2) having a large electric capacity. Moreover, even if the positive electrode plate (4) and the negative electrode plate (5) are thin and soft, they can be smoothly inserted into the valley groove (3a) of the separator. Then, each valley groove is formed by zigzag-folding the continuous body (3) by horizontally intersecting the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j between the rows). Since the positive electrode plate (4) and the negative electrode plate (5) are alternately inserted into (3a), zigzag folding of the continuum (3) and insertion of the positive and negative electrode plates (4, 5) can be performed simultaneously. Therefore, the tact time can be further shortened.

  Moreover, according to the invention which concerns on Claim 2, the positive electrode plate (4) and negative electrode plate group of the square battery electrode plate group which piles up alternately so that a separator may interpose between positive and negative electrode plates (4, 5). In the manufacturing method, a plurality of guide plates (13a, 13b, 13c, 13d, 13e, 13f) are arranged in a zigzag shape in the vertical direction, and one of the guide plates (13a, 13b, 13c, 13d, 13e, 13f) is arranged. Between the first row and the other row, a superposed body (23) sandwiching the continuous body (24) of the negative electrode plate (5) with the continuous body (3, 3) of the two strips is inserted, and the guide plate (13a, 13b, 13c, 13d, 13e, 13f) each zigzag-folded superposed body (23) while zigzag-folding the superposed body (23) by horizontally intersecting the rows. In the groove (23a), the positive electrode plate ( ) And the guide plates (13a, 13b, 13c, 13d, 13e, 13f) are removed from the valleys (23a) of the superimposed body (23), and then the superimposed body (23) is removed. Since it is a manufacturing method of the rectangular battery electrode plate group (22) characterized by pressing in a zigzag direction and flattening, a necessary number of valley grooves (23a) are superimposed on one electrode plate group (22). (23) can be formed at the same time, and therefore the tact time can be greatly shortened. Each valley groove is formed by zigzag-folding the overlapping body (23) by horizontally intersecting the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j between the rows). Since the positive electrode plate (4) is inserted into (23a), zigzag folding of the superimposed body (23) and insertion of the positive electrode plate (4) can be performed simultaneously, and therefore the tact time can be further shortened.

  Further, an electrode plate group having the same number of layers as in the invention of claim 1 can be formed by a smaller number of guide plates (13a, 13b, 13c, 13d, 13e, 13f) than in the invention of claim 1. Alternatively, by using the same number of guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) as in the invention according to claim 1, the invention according to claim 1 is used. It is possible to form an electrode plate group having a double number of layers.

  Further, since the superposed body (23) is zigzag-folded by crossing the guide plates (13a, 13b, 13c, 13d, 13e, 13f) between the rows, a deep valley groove (23a) is formed accordingly, and thus the positive electrode The plate (4) can be enlarged to form an electrode plate group (22) having a large electric capacity.

  As described in claim 3, in the method for manufacturing a rectangular battery electrode group according to claim 1 or 2, each trough (3a, 23a) of the continuum (3) or the superimposed body (23). ) Insert both the positive plate (4) and the negative plate (5) or the positive plate (4) into the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i). , 13j), the positive electrode plate (4) or the negative electrode plate (5) inserted into the troughs (3a, 23a) of the continuous body (3) or the superposed body (23) is pressed. The guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) can be accurately positioned in the length direction.

  As described in claim 4, in the method for manufacturing a rectangular battery electrode group according to claim 1 or 2, each valley groove (3 a, 23 a) of the continuum (3) or the superimposed body (23). ) After extracting the guide plate from the inside, before pressing the continuum (3) or the superimposed body (23) flatly, the positive plate (4) and the negative plate (5) 3a, 23a), the guide plates (13a, 13b, 13c, 13d, 13e, 13f) in the valleys (3a, 23a) of the continuous body (3) or the superposed body (23) , 13g, 13h, 13i, 13j), the positive electrode plate (4) and the negative electrode plate (5) move to the position where the positive electrode plate (4) and the negative electrode plate (5) overlap. The electric capacity is increased and the performance as a battery is improved. Moreover, a separator will be used more efficiently.

  According to a fifth aspect of the present invention, in the method for manufacturing the rectangular battery electrode group according to the first or second aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i). , 13j) is formed on an inclined plate that is inclined to the tip of the crossing side, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) and the guide plate from the valleys (3a, 23a) of the continuous body (3) or the superposed body (23). (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) can be easily removed, and the time required for zigzag folding can be shortened.

  According to a sixth aspect of the present invention, in the method of manufacturing the rectangular battery electrode group according to the first or second aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i , 13j) When a rotatable roller (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j) is attached to the crossing end of the continuous body (3) or superposed body (23) When the zigzag is folded, the tension applied to the continuous body (3) or the superposed body (23) can be relaxed, and the breakage of the continuous body (3) or the superposed body (23) can be prevented.

  According to a seventh aspect of the present invention, in the method for manufacturing the rectangular battery electrode group according to the sixth aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) are provided. ) Between the rows, the continuous body (3) or the superposed body (23) from the surface of the rollers (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j). When air is discharged toward the continuum, the continuum (3) or the superimposed body (23) and the guide plate (13a, 13b, 13c) are formed when the continuum (3) or the superimposed body (23) is zigzag folded. , 13d, 13e, 13f, 13g, 13h, 13i, 13j) to further reduce the tension applied to the continuous body (3) or the superposed body (23), and to reduce the time required for zigzag folding. Can be shortened, and It is possible to prevent breakage of connection body (3) or piled body (23) more properly.

  As described in claim 8, in the method of manufacturing a rectangular battery electrode group according to claim 6, the rollers (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j) And at least one of the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) on the surface in contact with the continuous body (3) or the superposed body (23). When the continuous body (3) or the superposed body (23) is zigzag folded, the continuous body (3) or the superposed body (23) and the guide plate (13a, 13b, 13c, 13d) are formed. , 13e, 13f, 13g, 13h, 13i, 13j) to further reduce the tension applied to the continuum (3) or the superposed body (23) and reduce the time required for zigzag folding. Can also Breakage can be more appropriately prevented the continuum (3) or piled body (23).

  According to the ninth aspect of the invention, the rectangular battery electrode plate group in which the positive electrode plate (4) and the negative electrode plate (5) are alternately overlapped so that the separator is interposed between the positive and negative electrode plates (4, 5). Are arranged in a zigzag shape in the vertical direction, the positive electrode plate (4) is placed on one row, the negative electrode plate (5) is placed on the other row, and between one row and the other row When the separator continuum (3) is inserted into the zigzag folds, the continuum (3) is zigzag-folded so as to cross between the rows in the horizontal direction. A plurality of guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) in which the positive electrode plate (4) and the negative electrode plate (5) are alternately inserted into the trough (3a). ) And the guide plate (3a) from within the valley (3a) of the continuum (3). 3a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j), when the positive plate (4) and the negative plate (5) are held in the troughs (3a). Since the electrode plate holding means (14, 14, 15, 15) and the pressing means (18) for pressing the continuum (3) in a zigzag direction to make it flat are provided. The required number of troughs (3a) for the two electrode plate groups (2) can be formed simultaneously in the separator continuum (3), and therefore the tact time can be greatly shortened. Further, the separator is zigzag folded by crossing the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) between the rows, so that a deep groove (3a) is formed. Therefore, the positive electrode plate (4) and the negative electrode plate (5) can be enlarged to form an electrode plate group (2) having a large electric capacity. Moreover, even if the positive electrode plate (4) and the negative electrode plate (5) are thin and soft, they can be smoothly inserted into the valley groove (3a) of the separator. Then, the electrode plate is formed by zigzag-folding the continuum (3) by crossing the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j horizontally between the rows). Since the positive electrode plate (4) and the negative electrode plate (5) are alternately inserted into each trough (3a) by the inserting means, the zigzag folding of the continuum (3) and the positive and negative electrode plates (4, 5) Insertion can be performed simultaneously, so that the structure can be simplified and the tact time can be further shortened.

  According to the invention of claim 10, the rectangular battery electrode in which the positive electrode plate (4) and the negative electrode plate (5) are alternately overlapped so that the separator is interposed between the positive and negative electrode plates (4, 5). In the plate group manufacturing apparatus, the positive electrode plates (4) are placed in one row and the other row in a zigzag manner in the vertical direction, and the two strips of the separator are placed between the one row and the other row. When the superposed body (23) with the continuous body (24) of the negative electrode plate sandwiched between the continuous bodies (3, 3) is inserted, the superposed body (23) is zigzag crossing in the horizontal direction between the rows. A plurality of guide plates (13a, 13b, 13c, 13d, 13e, 13f) which are inserted into the valley grooves (23a) of the zigzag folded superposed body (23) while being folded. And the guide plates (23a) from within the valleys (23a) of the superimposing body (23). 3a, 13b, 13c, 13d, 13e, 13f), and electrode plate holding means (14, 14, 15, 15) for holding the positive electrode plate (4) in the valleys (23a) when extracting And a pressing means (18) for pressing and flattening the superposed body (23) in a zigzag direction. Therefore, a necessary number of valley grooves (22) required for one electrode plate group (22) are provided. 23a) can be simultaneously formed on the superimposed body (23), so that the tact time can be greatly reduced. Then, the guide plate (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) is crossed in a horizontal direction between the rows to zigzag the superimposed body (23), and the guide plate (13a, 13b, 13c, 13d, 13e, 13f) Since the positive plate (4) is inserted into each trough (23a), zigzag folding of the superimposed body (23) and insertion of the positive plate (4) Thus, the structure can be simplified and the tact time can be further shortened.

  Further, since the superposed body (23) is zigzag-folded by crossing the guide plates (13a, 13b, 13c, 13d, 13e, 13f) between the rows, a deep valley groove (23a) is formed accordingly, and thus the positive electrode The area of the plate (4) and the negative electrode plate (24) can be increased to form an electrode group (22) having a large electric capacity.

  As described in claim 11, in the method for manufacturing a rectangular battery electrode group according to claim 9 or 10, each valley groove (3 a, 23 a) of the continuum (3) or the superimposed body (23). And a stopper (16, 17) for pressing both the positive electrode plate (4) and the negative electrode plate (5) inserted into the guide plate or the positive electrode plate (4) in the length direction of the guide plate. When doing so, the positive electrode plate (4) or the negative electrode plate (5) inserted into the troughs (3a, 23a) of the continuous body (3) or the superposed body (23) is guided to the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j) can be accurately positioned.

  As described in claim 12, in the manufacturing apparatus for the rectangular battery electrode group according to claim 9 or 10, each trough (3a, 23a) of the continuum (3) or the superposed body (23). ) After the guide plate (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) is removed from the inside, the continuous body (3) or the superposed body (23) is pressed flatly. When it is assumed that the positive plate (4) and the negative plate (5) are further provided with pushing members (14, 15) that push the grooves into the valleys (3a, 23a) before, the continuum (3) Or the positive electrode plate (4) to the position where the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) exist in the valleys (3a, 23a) of the superposed body (23). ) And the negative electrode plate (5) move so that the positive electrode (4) and increasing overlap area between the negative electrode plate (5), the more the capacitance is increased, thereby improving the performance of the battery. Moreover, a separator will be used more efficiently.

  According to a thirteenth aspect of the present invention, in the apparatus for manufacturing a rectangular battery electrode group according to the ninth or tenth aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i). , 13j) is formed on an inclined plate that is inclined to the tip of the crossing side, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) and the guide plate from the valleys (3a, 23a) of the continuous body (3) or the superposed body (23). (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) can be easily removed, and the time required for zigzag folding can be shortened.

  According to a fourteenth aspect of the present invention, in the manufacturing apparatus for the rectangular battery electrode group according to the ninth or tenth aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i). , 13j) when a rotatable roller (6a, 6b, 6c, 6d, 6e, 6f, 63g, 6h, 6i, 6j) is attached to the continuous end (3) or superposed body (23) When the zigzag is folded, the tension applied to the continuous body (3) or the superposed body (23) can be relaxed, and the breakage of the continuous body (3) or the superposed body (23) can be prevented.

  According to a fifteenth aspect of the present invention, in the apparatus for manufacturing a rectangular battery electrode plate group according to the fourteenth aspect, the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j). ), The air is discharged from the surface of the rollers (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j) toward the continuum or the superimposed body. When the discharge holes to be formed are provided in the rollers (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j), the continuous body (3) or the superposed body (23) is zigzag Friction between the continuous body (3) or superposed body (23) and the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) is reduced during folding. (3) or superimposed body (2 Further alleviate such tension), it is possible to shorten the time required for folding a zigzag, also can be more properly prevented breakage of the continuum (3) or piled body (23).

  As described in claim 16, in the manufacturing apparatus of the rectangular battery electrode plate group according to claim 14, the roller (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j). And at least one of the guide plates (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j) on the surface in contact with the continuous body (3) or the superposed body (23). When the continuous body (3) or the superposed body (23) is zigzag folded, the continuous body (3) or the superposed body (23) and the guide plate (13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j) to further reduce the tension applied to the continuum (3) or the superposed body (23) and reduce the time required for zigzag folding. Can , It is possible to more appropriately prevent breakage of the continuum (3) or piled body (23).

  The best mode for carrying out the present invention will be described below with reference to the drawings.

<Embodiment 1>
In FIG. 1, reference numeral 1 denotes a rectangular case of a lithium ion secondary battery, and reference numeral 2 denotes an electrode plate group housed in the rectangular case 1. A positive electrode terminal and a negative electrode terminal (not shown) are provided at predetermined positions of the rectangular case 1. In addition, the rectangular case 1 is filled with an electrolytic solution obtained by blending an organic solvent with a lithium salt.

  As shown in FIG. 2, the electrode plate group 2 includes a continuous body 3 that is zigzag-folded as a separator, and positive electrode plates 4 and negative electrode plates 5 that are alternately inserted into the valley grooves 3 a of the continuous body 3. It is comprised as a laminated body. The positive electrode plate 4 and the negative electrode plate 5 are alternately overlapped so that a separator is interposed therebetween, and are flatly folded together with the separator 3. The positive electrode plate 4 and the negative electrode plate 5 are provided with lead portions 4a and 5a that protrude from the separator 3 to the opposite sides, and the lead portions 4a and 5a of each electrode are bundled respectively to the positive electrode terminal and the negative electrode terminal (not shown). Connected.

  The positive electrode plate 4 is formed by applying a positive electrode active material such as a lithium transition metal composite oxide on both surfaces of a sheet-like metal foil such as an aluminum foil. The negative electrode plate 5 is formed by applying a negative electrode active material such as a carbon material on both surfaces of a sheet-like metal foil such as a copper foil. The separator continuous body 3 is made of a porous film in which fine pores made of a synthetic resin such as a polyolefin resin are formed.

  Next, the manufacturing apparatus of the said electrode group is demonstrated based on FIG. 3 thru | or FIG.

  As shown in FIG. 3, the manufacturing apparatus of the electrode plate group 2 is arranged in a zigzag shape in the vertical direction, the positive electrode plate 4 is placed in one row, the negative electrode plate 5 is placed in the other row, When the separator continuum 3 is inserted between the other rows, the continuum 3 is zigzag-folded so as to cross between the rows in the horizontal direction, and each valley groove 3a of the zigzag-folded continuum 3 is formed. (See FIG. 2) A plurality of guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j in which the positive electrode plate 4 and the negative electrode plate 5 are alternately inserted, and each of the continuum 3 Electrode plate holding for holding the positive electrode plate 4 and the negative electrode plate 5 in each valley groove 3a when the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j are extracted from the valley groove 3a. Means and press the continuum 3 in a zigzag direction to make it flat That includes the press means.

  The number of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j is the same as the number of the positive and negative electrode plates 4, 5 supplied to the single continuum 3 of the separator, or More than that will be prepared. Then, they are arranged horizontally in two rows on the base 7 in a vertical direction, and arranged in a zigzag manner between the rows. As shown in FIGS. 3 and 4 (A), (B), (C), the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are arranged horizontally between the rows. It is formed in the inclination board which inclines gently at the front-end | tip (henceforth a cross-side front-end | tip) which cross | intersects.

  Each of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j can be rotated at the front end so that the separator continuous body 3 can be smoothly zigzag-folded. Rollers 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i and 6j are attached. That is, these rollers 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, and 6j are respectively connected to the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j. The guide plate 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j is attached to the guide plate 13a, 13b, 13c, 13e, 13f, 13g, 13h, 13i, 13j in a rotatable manner by a support arm (not shown). It has been. Each of the rollers 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, and 6j may be semi-cylindrical, not cylindrical, as long as the separator continuous body 3 can be smoothly guided. It may be a round bar that does not rotate.

  Each guide plate 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j has a continuous separator on each roller 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j. When the body 3 is zigzag-folded, a large number of minute discharge holes (not shown) for discharging air toward the continuous body 3 are formed as necessary. These discharge holes are formed in a desired shape and arrangement such as a circular shape and a groove shape. By discharging air from these discharge holes, friction between the continuous body 3 and the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j is reduced, and the separator continuous body 3 Zigzag folding is further facilitated.

  Further, a friction reducing material layer (not shown) is formed on the surfaces of the rollers 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, and 6j as necessary. The friction reducing material layer is formed by applying a fluororesin or the like. Thereby, the friction between each roller 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j and the separator continuous body 3 is reduced, and the zigzag folding of the separator continuous body 3 is smoothed. Is done. Furthermore, the friction reducing material layer may be formed on the upper surfaces of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j as necessary.

  The guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j intersect each other when the separator continuum 3 is inserted between one row and the other row. And a drive unit for zigzag-folding the separator continuous body 3. The drive unit includes a ball screw interposed between the base 7 and a frame (not shown) that supports the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j for each row. And a motor for rotating the ball screw, or a piston / cylinder device. The drive unit using these ball screws, motors, etc., or piston / cylinder devices are ordinary feeding means, and are not shown.

  On the base 7, as shown in FIGS. 6B and 6C, a surface plate 11 that receives the continuous body 3 of zigzag separators from below is movably installed. Further, as shown in FIGS. 4B and 4C, a clamp 12 that holds the starting end of the separator continuous body 3 is provided near the surface plate 11 so as not to interfere with the surface plate 11. . Above the surface plate 11, a roll (not shown) around which the separator continuous body 3 is wound is provided. The roll is configured so that a load is not applied as much as possible in the feeding direction of the continuum 3, and tension generated in the continuum 3 at a zigzag folded portion is reduced.

  The guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are alternately inserted with the positive plates 4 and the negative plates 5 into the valley grooves 3a of the separator continuous body 3 while zigzag-folding. To do.

  Specifically, as shown in FIG. 5C, the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are formed by connecting the positive and negative electrode plates 4 and 5 to the separator. After being inserted into each trough 3a of the body 3, the separator 3 is configured to be immediately separated from the trough 3a of the continuous body 3 of the separator. When the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are retracted, the electrode plates 4 and 5 are left in the valley grooves 3a of the separator continuum 3, so that FIG. ), (B), (C) to FIGS. 5 (A), (B), (C), guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j Push members 14, 14, 15, and 15 as electrode plate holding means are arranged so as to be sandwiched from both the left and right sides for each row. Specifically, the pressing members 14, 14, 15, 15 are electrode plates 4 protruding from the left and right sides of the guide plates 13 a, 13 b, 13 c, 13 d, 13 e, 13 f, 13 g, 13 h, 13 i, 13 j. , 5 are arranged as vertical bars in contact with the rear edges of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j. These push members 14, 14, 15, 15 are located behind the pole plates 4, 5 protruding from the left and right sides of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j. Therefore, when the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are separated from the valley groove 3a of the separator continuous body 3, the positive and negative electrode plates 4, 5 stays in each trough 3a on the separator side. The pressing members 14, 14, 15, 15 are connected to the base 7 via a motor (not shown) or a piston / cylinder device that rotates the ball screw, and guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, When the members 13h, 13i, and 13j advance into the valley groove 3a of the separator continuous body 3, the push members 14, 14, 15, and 15 are also advanced by driving the piston / cylinder device or a motor that rotates the ball screw and the ball screw. The guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j remain in the advanced position even after they have moved out of the trough 3a.

  As shown in FIGS. 3 and 5 (A) and 5 (B), a separator continuum 3 is provided on both sides of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j in the width direction. Stoppers 16 and 17 for pressing the positive electrode plate 4 and the negative electrode plate 5 inserted in the respective valley grooves 3a in the width direction of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j. Provided as needed. The stoppers 16 and 17 can be reciprocated in the width direction of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j by a piston / cylinder device (not shown). Is in contact with the side edges of all the positive electrode plates 4 inserted into the valley grooves 3a of the separator by the guide plates 13a, 13c, 13e, 13g, 13i in one row and protruding from the side edges of the separator, and the other stopper 17 is in contact with the side edges of all the negative electrode plates 5 which are inserted into the valley grooves 3a of the separator by the guide plates 13b, 13d, 13f, 13h and 13j of the other row and protrude from the side edges on the opposite side of the separator. It is like that. The positive plates 4 and the negative plates 5 inserted into the valley grooves 3a of the separator continuous body 3 by the stoppers 16 and 17 are guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, It is positioned accurately in the width direction of 13j.

  The guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are separated by a guide plate removing means as shown in FIGS. 5 (A), (B), and (C). The body 3 can be extracted from each valley groove 3a. Although not shown, the guide plate removing means is constituted by, for example, a piston / cylinder device (or a ball screw and a motor for rotating the ball screw). This piston / cylinder device is interposed between a vertical frame (not shown) of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j and the base 7, and As shown in FIGS. 5A, 5B, and 5C, the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are connected to the separator continuous body 3 along with the expansion / contraction operation. It leaves | separates out of each trough 3a, or returns to the position shown to FIG.3 and FIG.4 (A), (B), (C).

  As described above, the push members 14, 14, 15, and 15 are connected to the base 7 via a ball screw (not shown) and a motor or a piston / cylinder device that rotates the ball screw. After the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are removed from the valley grooves 3a of the zigzag separator separator 3, the ball screw and the ball screw are rotated. When the motor or the piston / cylinder device is operated, as shown in FIGS. 5 (A), (B), (C), the push members 14, 14, 15, 15 further advance, and the positive plate 4 and the negative plate 5 are moved forward. Is pushed deeper into each trough 3a.

  As shown in FIGS. 6A, 6B, and 6C, the pressing means is configured as a pusher 18 that can move up and down in the vertical direction on the base 7. In the pusher 18, the push members 14, 14, 15, 15 further advance toward the guide plates 13 a, 13 b, 13 c, 13 d, 13 e, 13 f, 13 g, 13 h, 13 i, 13 j, and the positive plate 4 and the negative plate 5 are moved. When pushing deeper into each trough 3a, the separator continuum 3 is pressed in a zigzag direction to make it flat. Thus, the separator is flattened to the thickness of the electrode plate group 2 shown in FIG. 2 with the positive electrode plate 4 and the negative electrode plate 5 being sandwiched.

  As shown in FIGS. 6A, 6B, and 6C, guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, and the like are formed from the valley grooves 3a of the separator continuous body 3. When removing 13i and 13j, the continuum 3 may be lightly pressed in the zigzag direction by the pusher 18. Thereby, the continuous body 3 of the separator bent in a zigzag shape can be prevented from collapsing with the extraction of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j.

  The electrode plate group 2 is manufactured by the manufacturing apparatus configured as described above in the following procedure.

  (1) As shown in FIGS. 3 and 4A, 4B, and 4C, guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, which are arranged in a zigzag shape, A separator continuum 3 is inserted between one row and the other row of 13 j, and the tip of the continuum 3 is held by the clamp 12. The continuous body 3 is drawn out from a roll (not shown) around which the continuous body 3 is wound, and is stretched between the upper and lower guide plates 13a and 13j with a small tension.

  (2) In FIGS. 4A and 4C, the rows of guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j move in the horizontal direction indicated by the arrows, and FIG. As shown in A), (B), and (C), the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j intersect each other. As a result, the separator continuum 3 is zigzag-folded, and the necessary number of valley grooves 3 a for one electrode plate group 2 are formed simultaneously in the separator continuum 3, which is necessary for manufacturing the electrode plate group 2. Tact time is greatly reduced. Further, since the separator is zigzag folded by crossing the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j between the rows, the deep valley groove 3a is formed accordingly and is large. The positive electrode plate 4 and the negative electrode plate 4 can be inserted, and the electrode plate group 2 having a large electric capacity can be manufactured.

  At the intersecting end of each guide plate 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j, rotatable rollers 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, Since 6i and 6j are attached, the tension | tensile_strength of the separator continuous body 3 is relieve | moderated and it is zigzag-folded smoothly.

  Further, when the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j intersect each other, the rollers 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, Air is discharged from the discharge holes toward the separator continuum 3 from the surfaces 6i and 6j. Thereby, when the continuous body 3 of a separator is zigzag-folded, the friction between the continuous body 3 and the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j is reduced. The tension applied to the body 3 is further relaxed. As a result, the time required for zigzag folding of the separator continuous body 3 is shortened, and breakage of the continuous body 3 is more appropriately prevented.

  (3) In FIGS. 4A and 4C, when the rows of guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j move in the horizontal direction indicated by the arrows, The positive electrode plate 4 is placed in advance on the guide plates 13a, 13c, 13e, 13g, and 13i in the row, and the negative plate 5 is placed in advance on the guide plates 13b, 13d, 13f, 13h, and 13j in the other row. It has been. As a result, as shown in FIGS. 5A, 5B, and 5C, the positive plates 4 and the negative plates 5 are alternately inserted into the valley grooves 3a of the continuous body 3 that is zigzag folded.

  In this way, the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j are crossed between the columns to zigzag fold the continuum 3, and positive electrodes in the valley grooves 3a. By alternately inserting the plate 4 and the negative electrode plate 5, the zigzag folding of the continuum 3 and the insertion of the positive and negative electrode plates 4 and 5 can be performed simultaneously, simplifying the structure of the apparatus and reducing the tact time. Further shortening is possible.

  As shown in FIGS. 5A, 5B, and 5C, the pressing members 14, 14, 15, and 15 are also provided on the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j. With the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j, they are moved forward to the separator side and stopped.

  (4) As shown by the two-dot chain line in FIG. 5 (C), the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j Immediately after insertion into 3a, it moves back to its original position. Here, since each guide plate 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j is formed as an inclined plate that is inclined to the tip on the crossing side, Guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j, and guide plates 13a, 13b, 13c, 13d, 13e from within the valley grooves 3a of the continuum 3. , 13f, 13g, 13h, 13i, 13j can be easily removed, and the time required for zigzag folding can be shortened.

  The pushing members 14, 14, 15, 15 remain in the forward position and keep in contact with the rear edges of the electrode plates 4, 5. Therefore, when the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j are retracted, the electrode plates 4, 5 are guided by the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h. , 13i, 13j, the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j are retracted in an empty state, and the electrode plates 4, 5 are separated from the valley grooves 3a of the separator. Remains in.

  (5) As shown in FIGS. 5A, 5B, and 5C, guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j on which the electrode plates 4 and 5 are placed. Enters the valley groove 3a of the separator, the stoppers 16 and 17 advance in the width direction of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j. One stopper 16 is inserted into each valley groove 3a of the separator by one row of guide plates 13a, 13c, 13e, 13g, and 13i and is attached to the side edges of all positive electrode plates 4 protruding from the side edges of the separator. Abut. Further, the other stopper 17 is inserted into each valley groove 3a of the separator by the other row of guide plates 13b, 13d, 13f, 13h, 13j, and all of the negative electrode plates 5 protruding from the opposite side edge of the separator. Contact the side edge. As a result, the positive electrode plate 4 and the negative electrode plate 5 inserted into the valley grooves 3a of the separator continuous body 3 have the widths of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j. Positioned accurately in the direction.

  (6) Also, as shown in FIGS. 5A, 5B, and 5C, guide plates 13a, 13b, 13c, 13d, 13e, and 13f are formed from within the valley grooves 3a of the zigzag continuum 3 of the separator. , 13g, 13h, 13i, and 13j are extracted. At that time, the continuous body 3 is lightly pressed in the zigzag direction by the pusher 18. This prevents the zigzag-like continuous body 3 from collapsing with the removal of the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j.

  (7) Further, as shown in FIGS. 5A, 5B, and 5C, the pressing members 14, 14, 15, and 15 are slightly advanced toward the separator side, and the positive electrode plate 4 and the negative electrode plate 5 are moved to the respective sides. Push deeper into the trough 3a. Thereby, the positive electrode plate 4 and the negative electrode plate 5 move to the position where the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j exist in each valley groove 3a of the continuous body 3. The area where the positive electrode plate 4 and the negative electrode plate 5 overlap is increased, the electric capacity is increased accordingly, and the performance as a battery is improved. Moreover, a separator will be used more efficiently.

  The step of pushing the positive electrode plate 4 and the negative electrode plate 5 deeper into the valley grooves 3a is performed by the guide plates 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, and 13j of the zigzag continuous body 3 of the separator. You may perform immediately after extracting from each trough 3a.

  (8) As shown in FIGS. 6A, 6B, and 6C, the pusher 18 strongly presses the separator continuous body 3 in the zigzag direction in synchronization with the advancement of the pressing members 14, 14, 15, and 15. To do. As a result, the zigzag bent portion of the separator is creased and further flattened, and a flat laminated body in which the flat separator and the positive and negative electrode plates 4 and 5 are alternately overlapped is formed.

  (9) When the front end of the separator is released from the clamp 12 and the rear end is cut from the subsequent continuous body 3, the electrode plate group 2 shown in FIG. 2 is completed. The electrode plate group 2 is housed in a battery case 1 as shown in FIG.

<Embodiment 2>
7 is a perspective view of an electrode plate group manufactured by the method and apparatus according to the second embodiment of the present invention, and FIG. 8 is a schematic perspective view of an apparatus for carrying out the method according to the second embodiment of the present invention. is there. In addition, the same code | symbol is attached | subjected and demonstrated to the part which is the same as that of said Embodiment 1, or respond | corresponds.

  As shown in FIG. 7, the electrode plate group 22 according to the second embodiment includes a continuous superposed body 23 that is zigzag-folded, and a positive electrode plate 4 that is inserted into each valley groove 23 a of the superposed body 23. It is comprised as a flat laminated body which comprises. The superposed body 23 is a laminate formed by sandwiching a continuous body 24 of negative electrode plates between continuous bodies 3 and 3 of two strips. For this reason, the positive electrode plate 4 inserted into each valley groove 23a of the superposed body 23 faces the negative electrode plate 24 through the separator. The positive electrode plate 4 and the negative electrode plate 24 are provided with lead portions 4a and 24a protruding from the separators in opposite directions, and the lead portions 4a and 24a of the respective electrodes are bundled to show the battery case 1 (see FIG. 1). Not connected to the positive terminal and the negative terminal respectively.

  As shown in FIG. 8, the apparatus for manufacturing the electrode plate group 22 includes a plurality of guide plates 13a, 13b, 13c, 13d, 13e, 13f and the like arranged in a zigzag manner as in the first embodiment. The continuous overlapping body 23 is inserted between one row of the guide plates 13a, 13b, 13c, 13d, 13e, and 13f and the other row. . Further, all the guide plates 13a, 13b, 13c, 13d, 13e, and 13f are configured to convey only the positive electrode plate 4 into the valley groove 23a of the superimposed body 23. Except for these points, the electrode plate group 22 is manufactured in the same procedure by the same apparatus as in the first embodiment.

  In the second embodiment, since the valley groove 23a into which only the positive electrode plate 4 is inserted may be formed in the superposed body 23, the electrode plate group 22 having the same performance as the electrode plate group 2 of the first embodiment is manufactured. For example, the number of zigzags of the superposed body 23 is half of that in the case of the first embodiment. Therefore, the number of guide plates 13a, 13b, 13c, 13d, 13e, and 13f is reduced to almost half, and the tact time is further shortened. be able to. In addition, in FIG.7 and FIG.8, the description is abbreviate | omitted about the same structure and effect as the case of Embodiment 1. FIG.

  The present invention is not limited to the first and second embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, although the first and second embodiments have been described as the lithium ion secondary battery, the present invention can also be applied to batteries other than lithium ion batteries, primary batteries, and the like. In the first and second embodiments, when the guide plates are crossed between the rows, both rows are moved. However, the guide plates in one row are stopped and the guide plates in the other row are moved. However, similar zigzag folding can be performed. With such a configuration, it is possible to reduce the number of drive units that move the row of guide plates, and it is possible to reduce costs. Further, the number of guide plates and the like can be increased and decreased, and is not limited to the first and second embodiments.

FIG. 3 is a partially cutaway perspective view of a prismatic battery containing a group of electrode plates manufactured by the method and apparatus according to the first aspect of the present invention. It is a perspective view of the electrode group manufactured by the method and apparatus concerning Embodiment 1 of the present invention. It is a schematic perspective view of the apparatus for implementing the method which concerns on Embodiment 1 of this invention. The 1st process in the method which concerns on Embodiment 1 of this invention is shown, (A) is a top view, (B) is a front view, (C) is a left view. The 2nd process in the method which concerns on Embodiment 1 of this invention is shown, (A) is a top view, (B) is a front view, (C) is a left view. The 3rd process in the method which concerns on Embodiment 1 of this invention is shown, (A) is a top view, (B) is a front view, (C) is a left view. It is a perspective view of the electrode group manufactured by the method and apparatus concerning Embodiment 2 of the present invention. It is a schematic perspective view of the apparatus for enforcing the method which concerns on Embodiment 2 of this invention.

Explanation of symbols

2, 22 ... Electrode plate group 3 ... Separator continuum 3a, 23a ... Valley groove 4 ... Positive electrode plate 5 ... Negative electrode plate 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j ... Roller 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13i, 13j ... guide plate 14, 15 ... pushing member 16, 17 ... stopper 18 ... pusher 23 ... superimposed body 24 ... continuum of negative electrode plate

Claims (16)

  In a method for manufacturing a rectangular battery electrode plate group in which positive and negative electrode plates are alternately stacked so that a separator is interposed between positive and negative electrode plates, a plurality of guide plates are arranged in a zigzag shape in the vertical direction. The separator continuous body is inserted between one row of the guide plates and the other row, and the guide plate is crossed horizontally between the rows so that the continuous body is zigzag folded. The positive plates and the negative plates are alternately inserted into the valleys of the continuous body, the guide plates are removed from the valleys of the continuous body, and then the continuous body is pressed in a zigzag direction. A method for manufacturing a rectangular battery electrode plate group, characterized in that it is flattened.   In a manufacturing method of a rectangular battery electrode plate group in which positive and negative electrode plates are alternately stacked so that a separator is interposed between positive and negative electrode plates, a plurality of guide plates are arranged in a zigzag shape in the vertical direction. Between one row of the guide plates and the other row, a superimposed body in which the continuum of the negative electrode plates is sandwiched between the continuum of the two strip separators is inserted, and the guide plates are horizontally intersected between the rows. While zigzag folding the superimposed body, the positive plate is inserted into each valley groove of the zigzag superimposed body, and the guide plate is removed from each valley groove of the superimposed body. A method of manufacturing a rectangular battery electrode plate group, wherein the superposed body is pressed in a zigzag direction to be flat.   3. The method for manufacturing a rectangular battery electrode group according to claim 1, wherein both the positive electrode plate and the negative electrode plate, or the positive electrode plate, which are inserted into the valleys of the continuous body or the superposed body, are used. A method for manufacturing a group of electrode plates for a rectangular battery, wherein pressing is performed in the length direction of the guide plate.   In the manufacturing method of the electrode group for prismatic batteries according to claim 1 or 2, after extracting the guide plate from each trough of the continuum or the superposed body, the continuum or the superposed body is flattened. Before pressing, the positive electrode plate and the negative electrode plate are further pushed into each trough, and the method for producing a rectangular battery electrode plate group.   3. The method for manufacturing a rectangular battery electrode plate group according to claim 1 or 2, wherein the guide plate is formed as an inclined plate that is inclined to the tip on the crossing side.   3. The method of manufacturing a rectangular battery electrode plate group according to claim 1, wherein a rotatable roller is attached to a crossing side end of the guide plate.   7. The method for manufacturing a rectangular battery electrode group according to claim 6, wherein air is discharged from the surface of the roller toward the continuum or the superimposed body when the guide plates are crossed between rows. The manufacturing method of the electrode group for square batteries characterized by these.   7. The method for manufacturing a rectangular battery electrode plate group according to claim 6, wherein a friction reducing material layer is formed on a surface of at least one of the roller and the guide plate that contacts the continuous body or the superimposed body. The manufacturing method of the electrode group for square batteries made into.   In a manufacturing apparatus of a rectangular battery electrode plate group in which positive and negative electrode plates are alternately stacked so that a separator is interposed between positive and negative electrode plates, the positive electrode plates are arranged in a zigzag shape in a vertical direction, When the negative electrode plate is put on the other row and the continuum of the separator is inserted between one row and the other row, the continuum is crossed in the horizontal direction between the rows. A plurality of guide plates for alternately inserting the positive electrode plate and the negative electrode plate into the valley grooves of the zigzag folded continuous body, and the guide plates from the valley grooves of the continuous body. A rectangular shape comprising: electrode plate holding means for holding the positive electrode plate and the negative electrode plate in each valley groove when being removed; and pressing means for pressing the continuum in a zigzag direction to make it flat. Battery electrode group manufacturing equipment.   In a manufacturing apparatus for a rectangular battery electrode plate group in which positive and negative electrode plates are alternately overlapped so that a separator is interposed between positive and negative electrode plates, one column and the other column are arranged in a zigzag shape in the vertical direction. When the superposition body sandwiching the continuum of the negative electrode plate with the two strips of the separator is inserted between the one row and the other row, the horizontal plate is horizontally placed between the rows. The zigzag folding of the superposed body intersecting the direction, and a plurality of guide plates for inserting the positive plate into each trough groove of the zigzag superposed body, and the inside of each trough groove of the superposed body A square battery comprising: electrode plate holding means for holding the positive electrode plate in each of the troughs when the guide plate is removed; and pressing means for pressing the superimposed body in a zigzag direction to make it flat. Equipment for manufacturing electrode plates.   In the manufacturing apparatus of the square battery electrode plate group according to claim 9 or 10, both the positive electrode plate and the negative electrode plate, or the positive electrode plate inserted into each valley groove of the continuous body or the superposed body are the above-mentioned. An apparatus for manufacturing an electrode plate group for a rectangular battery, comprising a stopper for pressing in the length direction of the guide plate.   In the manufacturing apparatus of the square battery electrode plate group according to claim 9 or 10, after the guide plate is removed from each valley of the continuous body or the superimposed body, the continuous body or the superimposed body is flattened. An apparatus for manufacturing a group of electrode plates for a rectangular battery, comprising a pressing member for further pressing the positive electrode plate and the negative electrode plate into each trough before pressing.   11. The manufacturing apparatus for a rectangular battery electrode plate group according to claim 9 or 10, wherein the guide plate is formed into an inclined plate that is inclined to the front end of the crossing side.   11. The manufacturing apparatus for a rectangular battery electrode plate group according to claim 9 or 10, wherein a rotatable roller is attached to the tip of the guide plate on the crossing side.   15. The apparatus for manufacturing a group of rectangular battery electrodes according to claim 14, wherein when the guide plates are crossed between rows, air is discharged from the surface of the roller toward the continuum or the superimposed body. An apparatus for manufacturing a rectangular battery electrode plate group, wherein a hole is provided in the roller.   15. The apparatus for manufacturing a rectangular battery electrode group according to claim 14, wherein a friction reducing material layer is formed on a surface of at least one of the roller and the guide plate that is in contact with the continuous body or the superimposed body. A manufacturing apparatus for a rectangular battery electrode group.

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