TW201611381A - Method and apparatus for fabricating secondary battery - Google Patents

Abstract

The subject of the present invention is to prevent a separator from bending, wrinkling and shifting during formation of the separator, so as to ensure more stable moldability and accomplish reduction of take time. A method of this application for fabricating a second battery includes: a step of bending a separator in Zigzag shap; a step of inserting positive plates and negative plates alternatively into grooves in the separator so as to form a stacked body formed of the positive plates and the negative plates ternatively stacked with each other; and a step of fabricating a group of electrode plates with the stacked body by pulling guiding rods (21) from the grooves. The separator with a length by which the separator will be pulled while being bent in Zigzag shap is retained in advance. In the step of bending the separator in Zigzag shap, at an upstream side, when the separator is pulled into the means for bending in Zigzag shap, the retained separator is supplied toward the means for being in Zigzag shap. In the downstream side of the means for bending in Zigzag shap, a location of the separator is restricted and a transportation of the separator is guided. During the step of bending in Zigzag shap, a resist force is provided to against the movement of the separator which is delivered toward the means for bending in Zigzag shap.

Description

Secondary battery manufacturing method and manufacturing device

The present invention relates to a method and a manufacturing apparatus for manufacturing a secondary battery, and more particularly to a manufacturing method and a manufacturing apparatus which are suitable for and advantageous in the manufacture of a lithium-ion secondary battery.

A secondary battery such as a lithium ion secondary battery is formed by a plate group in which a positive electrode plate and a negative electrode plate are alternately overlapped so that a separator is interposed between a positive electrode plate and a negative electrode plate. In one of the manufacturing apparatuses of the electrode group, there is a zigzag stack manufacturing apparatus (refer to, for example, Patent Document 1), which is a method of bending a continuous body of a spacer into a zigzag shape (zigzag) ), and insert a positive electrode plate and a negative electrode plate in each of its valleys, and then press it into a flat shape. In the manufacturing apparatus of the zigzag stacking method, a continuous spacer is sandwiched by a pair of rollers, and the pair of rollers are moved back and forth in a horizontal direction to bend the spacer into a zigzag shape, and each When the pair of rollers are back and forth, the positive plate and the negative plate are alternately placed on the spacer.

In the manufacturing apparatus of the zigzag stacking method of Patent Document 1, in order to further shorten the production time, a system can be proposed to improve A method and a manufacturing apparatus for manufacturing a secondary battery of positional accuracy of positive and negative electrodes and separators (see Patent Document 2). This technique suspends the strip-shaped spacer from above, and then causes the spacers to be interlaced in a horizontal direction between the columns (column) and the rows (or by two spacers). The overlapping body of the electrode plate sandwiching one pole is bent into a zigzag shape, and then the positive electrode plate and the negative electrode plate are inserted into the valleys thus formed (the electrode plate of the other pole when the overlapping body is overlapped) Further, a plate group in which the positive electrode plate and the negative electrode plate sandwich the separator and which can overlap any of the secondary batteries can be manufactured.

In the method and apparatus for manufacturing a secondary battery of Patent Document 2, when the zigzag is bent in the zigzag bending means, the spacer which is suspended between the guiding members is attached to the upper side of the spacer. The accommodating case accommodated above the zigzag bending means is suspended downward by the roller, and the lower side of the spacer is accommodated in the accommodating case below the zigzag bending means, and the position in the width direction is There are no restrictions.

As a result, according to Patent Document 2, as compared with the case described in Patent Document 1, the positional accuracy of the positive and negative plates and the spacer can be expected to be improved, but the spacer is bent by the movement of the plurality of guiding members. In the zigzag shape, it is possible to cause the spacer to be pulled into the guiding member in a bouncing state. This possibility is caused by the unevenness of the width, the thickness, and the surface state of the spacer, and sometimes the accuracy of the above-described electrode group cannot be controlled within the allowable value. Therefore, although it is suitable to use a specific spacer having a predetermined width and thickness, it is necessary to consider the influence of the beating of the spacer when using spacers of different sizes.

Furthermore, in Patent Document 2, in the zigzag bending means The upper side and the lower side of the spacer which is suspended between the guide members are accommodated in the accommodating case, and the spacer is cut once and once for each part of the zigzag bending step. Therefore, in the vicinity of the cut portion, it is necessary to secure a margin portion for cutting the separator.

In order to solve this problem, the present applicant discloses a method and a manufacturing apparatus for a secondary battery in a zigzag bend in the PCT/JP2012/076826 (hereinafter referred to as the invention of the prior application) of the prior application. When the folding member is smoothly pulled by the guiding member, the precision of the product can be further improved, and the yield of the spacer can be improved as much as possible.

In the method for manufacturing a secondary battery according to the invention of the prior application, the zigzag is bent in a state in which the spacer is suspended from the hanging roller. Then, the positive electrode plate and the negative electrode plate are alternately inserted into each of the valleys of the zigzag-shaped spacer sheet, thereby forming a laminate body in which the positive electrode plate and the negative electrode plate are overlapped with each other via the separator, and then After the guide member is pulled out from each of the valleys of the separator, the laminate is pressed in a direction in which the positive electrode plate and the negative electrode plate are laminated to each other to produce an electrode group.

The spacer is disposed between the three support rollers on the upstream side and the downstream side of the upstream side of the hanging roller in the transport direction of the spacer. Further, the two upstream side buffer rollers that are arranged to abut against one of the faces of the spacer and can be moved up and down in the vertical direction are brought into a predetermined rising position or a lowered position in contact with the spacer, thereby The spacer is suspended between the guiding members via the hanging roller. In this state, in the zigzag bending step by the movement of the guiding member, the buffer roller is lowered or raised.

According to the invention of the prior application, the pulling length of the zigzag-shaped spacer can be compensated for by the rise of the cushion roller which is arranged to be movable up and down, so that the spacer can be cut without being cut in advance. The state is subjected to a predetermined zigzag bend. As a result, when the spacer or the like is pulled in by the guide member, the phenomenon that the spacer moves in the width direction and jumps can be suppressed, and the pulling of the guide member into the spacer smoothly proceeds.

Further, since the spacer is not cut into a predetermined length before the zigzag is bent, the predetermined zigzag bend can be performed in a continuous state, so that the yield of the spacer can be improved.

[Previous Technical Literature] (Patent Literature)

(Patent Document 1) Japanese Patent Laid-Open Publication No. 2004-22449

(Patent Document 2) Japanese Patent Laid-Open Publication No. 2012-226910

As described above, in the invention of the above prior application, the two buffer rollers are disposed between the three support rollers so as to be in contact with one of the faces of the spacer and can be vertically moved up and down to be in contact with the spacer. In a state of being in a predetermined ascending position or descending position, the spacer is suspended between the guide members via the hanging roller, and when the zigzag is bent by the movement of the guide member, the buffer roller is lowered or raised.

That is, in the invention of the prior application, the buffer portion (reserved length portion) of the spacer when the zigzag is bent is formed only in the zigzag bent hand. The upstream side of the segment. In other words, the spacer on the downstream side of the zigzag bending means is directly pulled out while being suspended, and is held below the zigzag bending means in a suspended state as a reserved length portion. The portion to be pulled out, or the reserved length portion, is folded and accommodated in the accommodating case, and is pulled into the zigzag bending means in the zigzag bending step from this state, so that it is smoother The pulling of the spacer on the downstream side of the zigzag bending means is preferably performed to stabilize the spacer on the downstream side.

The present invention has been made in view of the above prior art, and an object thereof is to provide a method and a manufacturing apparatus for manufacturing a secondary battery, which are capable of ensuring one of a separator during molding and one of positive and negative electrode sheets sandwiched by two separators. The more complex formability of the superposed body (hereinafter also referred to as a separator, etc.), and the shortening of the production time.

In order to achieve the above object, a first aspect of the present invention is a method of manufacturing a secondary battery, which is characterized in that, in a state in which a spacer is suspended between a guide member of a plurality of rows disposed oppositely via a hanging roller a step of bending the spacer into a zigzag shape by a zigzag bending means with the movement of the guiding member; inserting the positive electrode plate and the negative electrode alternately in each valley of the spacer sheet bent into a zigzag shape a step of forming a laminate in which the positive electrode plate and the negative electrode are alternately overlapped by the separator; and the guide member is pulled out from each of the valleys of the separator, and the laminated body is formed a step of pressing the direction in which the positive electrode plate and the negative electrode plate are stacked to form an electrode group; and constituting the spacer piece to be suspended from the guide roller via the hanging roller In the state between the lead members, before the step of zigzag bending by the movement of the guiding member, the spacer having a length that is pulled in when the zigzag is bent is retained in advance; in the zigzag bend In the step, on the upstream side of the zigzag bending means, when the zigzag bending means is pulled, the retained spacer is supplied to the zigzag bending means, and downstream of the zigzag bending means The side restricts the position of the spacer and guides the transport of the spacer, and in the zigzag bending step, imparts a force against the travel of the spacer moving toward the zigzag bending means.

According to the present aspect, in the zigzag bending step, the retained spacer is supplied to the zigzag bending means when pulled in the zigzag bending means on the upstream side of the zigzag bending means. And restricting the position of the spacer on the downstream side of the aforementioned zigzag bending means and guiding the transport of the spacer, and in the zigzag bending step, the movement of the spacer which is moved to the zigzag bending means is relatively resistant. force. As a result, the beating of the separator can be suppressed, and the formability of the separator can be improved, and the molding speed can be increased, so that the production time can be improved.

According to a second aspect of the present invention, in a method of manufacturing a secondary battery, a superposed body in which one of positive and negative electrode plates is sandwiched between two separators is suspended from a relative arrangement via a hanging roller. a step of bending the overlapping body into a zigzag shape by a zigzag bending means in a state between the guiding members of the plurality of rows; the aforementioned overlapping body bent in a zigzag shape The other of the electrode plates is inserted into each of the valleys, thereby forming the positive electrode plate and the negative electrode plate interposed with the overlapping body. a step of mutually overlapping the laminated bodies; and further, the guiding member is pulled out from the respective valleys of the overlapping body, and then the laminated body is pressed in a direction in which the positive electrode plate and the negative electrode plate are stacked to form a plate a step of grouping; and in a state in which the overlapping body is suspended between the guiding members via the hanging roller, the Z is previously made before the step of zigzag bending by the movement of the guiding member When the glyph is bent, the spacer which is pulled in length is retained; in the zigzag bending step, on the upstream side of the zigzag bending means, when the Z-shaped bending means is pulled, the aforementioned is retained. The overlapping body is supplied to the zigzag bending means, and the position of the overlapping body is restricted on the downstream side of the zigzag bending means and the conveyance of the overlapping body is guided, and in the zigzag bending step, the sum is given The force of the movement of the overlapping body moving toward the zigzag bending means is relatively resistant.

According to this aspect, in addition to the same action and effect as the first type, it is only necessary to insert one of the plates into the stacked body, so that the plates having the same performance as the first and second types are manufactured. In the group, the number of the valleys of the overlapping body is half, and the number of the guiding members and the like can be reduced to approximately half, and the simplification of the apparatus and the improvement of the yield can be expected.

According to a third aspect of the present invention, in the method for producing a secondary battery according to the first or second aspect, the spacer or the stacked body is provided by the air to the separator or the stacked body. The force of the travel of the spacer or the overlap relative to the resistance.

According to this type, by blowing air to the separator Or the overlapping body and the spacer or the overlapping body are given a force against the running, so that the formability of the spacer can be further improved, and the molding speed can be improved, so that the production time can be achieved. Improvement.

According to a fourth aspect of the invention, in the method of manufacturing the secondary battery of the third aspect, the air is ejected obliquely downward toward the spacer or the stacked body.

According to this aspect, since the air is ejected obliquely downward toward the spacer or the overlapping body, a force opposite to the moving direction of the spacer or the overlapping body that moves in a zigzag manner can be applied, so that the spacer or the overlapping The state of the body is stabilized, and the formability of the separator is improved, and along with this, the molding speed can be increased, so that the production time at the time of molding can be improved.

According to a fifth aspect of the present invention, in the method of manufacturing a secondary battery according to any one of the first to fourth aspects, in the guiding of the transport of the spacer or the stacked body, by guiding The means of transport encloses the aforementioned spacer or overlap.

According to this aspect, since the spacer or the overlapping body is surrounded by the means of guiding conveyance, the position of the spacer or the overlapping body can be stabilized, and the formability of the spacer can be improved, and the molding can be improved. Speed, so it can also achieve the increase in production time.

According to a sixth aspect of the invention, there is provided a device for manufacturing a secondary battery, comprising: a zigzag bending means having a plurality of guiding members arranged in a zigzag shape in a vertical direction, and the guides are arranged between the rows The lead members are staggered in the horizontal direction and will be suspended from the aforementioned guide via the hanging rollers The separator between one row and the other of the member is bent into a zigzag shape; and the electrode plate inserting means respectively are provided with a plate transporting member for placing a positive electrode plate of a predetermined number of positive electrode plates and for mounting a plate transporting member for a negative electrode plate of a predetermined number of negative plates, and moving the electrode plate transporting member for the positive electrode plate and the negative electrode plate into each of the valleys of the separator, and the positive electrode plate and the foregoing The negative electrode plates are alternately inserted into the respective valleys; the spacer supply means supplies the spacers held by the spacer holding portions and pulled out via the hanging rollers to the zigzag bending means, and preliminarily When the zigzag is bent, the spacer which is pulled in length is retained, and the retained spacer is supplied to the zigzag bending means when the zigzag is bent; and the stabilizing means is provided in the foregoing In the zigzag bending step, when the zigzag bending means is pulled, the position of the spacer is restricted and the transport of the spacer is guided, and in the zigzag bending step, the zigzag bending means is given mobile Traveled with force against the spacer.

According to this aspect, in the zigzag bending step, the position of the spacer is restricted and the transport of the spacer is guided when pulled into the zigzag bending means, and in the zigzag bending step, the zigzag is imparted to the zigzag The force of the travel of the spacer moving by the bending means is relatively resistant. As a result, the beating of the separator can be suppressed, and the formability of the separator can be improved, and the molding speed can be increased, so that the production time can be improved.

According to a seventh aspect of the invention, there is provided a device for manufacturing a secondary battery, comprising: a zigzag bending means having a plurality of guiding members arranged in a zigzag shape in a vertical direction, and guiding the wires between the rows The members are staggered in a horizontal direction, and the overlapping body formed by sandwiching one of the positive and negative electrode plates between the one row and the other of the guiding members via the hanging roller is bent into Z a plate insertion means including a plate transporting member for placing the predetermined number of the electrode plates, and moving the plate transporting member to each of the valleys of the stacked body; The other electrode plate is inserted into each of the valleys, and the overlapping body supply means supplies the overlapping body held by the overlapping body holding portion and pulled out via the hanging roller to the zigzag bending means, and The overlapped body of the length that is pulled in when the zigzag is bent is retained in advance, and the retained stacked body is supplied to the zigzag bending means when the zigzag is bent; and the stabilization means is In the aforementioned zigzag bending step, the position of the overlapping body is restricted and the conveyance of the overlapping body is guided when being pulled into the zigzag bending means, and in the zigzag bending step, the zigzag curve is imparted to Folding means to move Traveled with force against the body.

According to this aspect, in addition to the same action and effect as the sixth type, since only one pole plate is inserted into the overlapping body, the same performance as the first and second types is produced. In the case of the plate group, the number of the valleys of the overlapping body is half, and the number of the guiding members and the like can be reduced to approximately half, and the simplification of the apparatus and the improvement of the yield can be expected.

According to a eighth aspect of the present invention, in the apparatus for manufacturing a secondary battery according to the sixth or seventh aspect, the stabilizing means has a function of blowing air to the separator or the stacked body.

According to this aspect, it is possible to provide a manufacturing apparatus capable of easily blowing air to a separator or an overlap to impart a force against the travel of the spacer or the overlap.

According to a ninth aspect of the invention, in the apparatus for manufacturing a secondary battery according to the eighth aspect, the stabilizing means ejects the air toward an obliquely downward direction of the spacer or the stacked body.

According to this aspect, it is possible to provide a means for ejecting air obliquely downward toward the spacer or the overlapping body, and more reliably imparting a force against the travel of the spacer or the overlapping body.

According to a tenth aspect of the present invention, in the apparatus for manufacturing a secondary battery according to any one of the sixth to ninth aspects, the stabilizing means has a movable portion, and the spacer or the overlapping body In the guiding of the conveyance, the spacer or the stacked body is surrounded by the constituent elements of the stabilizing means including the portion by moving the portion.

According to this aspect, since the spacer or the overlapping body is surrounded by means of guiding conveyance, it is possible to provide a position for stabilizing the spacer or the overlapping body, and to improve the formability of the spacer or to increase the molding speed. It is also possible to achieve a manufacturing device with an increased production time during molding.

According to a tenth aspect of the present invention, in the apparatus for manufacturing a secondary battery according to the tenth aspect, the stabilizing means has the following component: the spacer that is suspended from the hanging roller or a plate-shaped flat plate portion disposed on one side of the superposed body along the hanging direction; the end portion of the spacer or the overlapping body is abutted against the inner peripheral surface Two guiding members that protrude from the spacer side or the overlapping body side and extend toward the moving direction of the spacer or the overlapping body in a manner of a position in the width direction of the spacer or the overlapping body; and the spacer or The overlapping body is disposed on the opposite side of the flat plate portion, and is formed to be movable toward the flat plate portion, and is formed with the flat plate portion and the two guiding members to form a rectangular cross-sectional shape through which the spacer or the overlapping body passes The aforementioned part of the space.

According to this aspect, the flat portion, the two guiding members, and the cover member form a rectangular space by passing the spacer or the overlapping body through the transverse cross-sectional shape, and by inserting the spacer or the overlapping body into the space, The distribution and transportation of the spacer or the overlap can be performed smoothly in cooperation with the guiding function of the guiding member.

According to a twelfth aspect of the present invention, in the apparatus for manufacturing a secondary battery according to the eleventh aspect, the portion has the first and second movement modes in which the amount of movement when moving toward the flat plate portion is different, and In the first movement mode, a space in which a transverse cross-sectional shape through which the spacer or the superimposed body passes is formed together with the flat plate portion and the two guide members, and is performed by the zigzag bending means. At the end of the zigzag bending step, the second movement mode is further moved toward the flat plate portion, and the spacer or the overlapping body is sandwiched between the flat plate portion and the flat plate portion.

According to this aspect, since the spacer can be clamped and clamped in the second movement mode, even at the end of the zigzag bending step, even if the guide member is pulled out from the spacer which is bent into a zigzag shape, the guide member is not produced. Isolation Slack, a series of operations can be performed well.

According to a thirteenth aspect of the present invention, in the apparatus for manufacturing a secondary battery according to the sixth or seventh aspect, the stabilizing means includes: a spacer that is suspended from the spacer or the overlapping body of the hanging roller a plate-shaped flat plate portion disposed along the hanging direction; a spacer-shaped moving member that is disposed on a side opposite to the flat plate portion with respect to the spacer or the overlapping body and that is movable toward the flat plate portion And a base end portion is fixed to the flat plate portion or the moving member, and extends upward in a hanging direction of the spacer or the overlapping body and elastically abuts the front end portion to the spacer or the overlapping body Pressing member.

According to this aspect, the same operational effects as those of the twelfth embodiment can be achieved with a simple configuration.

According to a fourth aspect of the present invention, in the apparatus for manufacturing a secondary battery according to the sixth or seventh aspect, the stabilizing means includes: a position restricting roller that is suspended along the spacer or the overlapping body a plurality of ones are disposed on one side of the spacer or the superimposing body; and a pressing roller is disposed between the two of the position restricting rollers on the other side of the spacer or the overlapping body, and is formed to face The surface of the other side of the spacer or the overlap moves and abuts.

According to this aspect, the desired tension can be correctly imparted to the spacer by adjusting the amount of pressing of the pressing roller.

According to a fifteenth aspect of the present invention, in the apparatus for manufacturing a secondary battery according to any one of the sixth to fourteenth aspects, the spacer is supplied The means or the superimposing body supply means includes at least two support rollers that are supported on the upstream side and the downstream side of the upstream side and the downstream side in the transport direction of the spacer or the superimposed body on the upstream side of the hanging roller; Between the support rollers, at least one upstream buffer roller that can be moved up and down in a direction perpendicular to one side of the spacer or the overlap; and the spacer or the overlap is provided via the hanging roller The body is supplied to the side of the zigzag bending means, and a reserved length portion of the spacer or the stacked body which is pulled in when the zigzag is bent is formed on the upstream side of the hanging roller, and the upstream side buffer is further provided. When the roller is in a predetermined rising position or a lowered position in a state in which the spacer or the overlapping body is in contact with the spacer, the spacer or the overlapping body is suspended between the guiding members via the hanging roller. When the Z-shaped bending by the movement of the guiding member is performed, the upstream side buffer roller is lowered or raised.

According to the present aspect, since the reserved length portion is provided on the upstream side of the zigzag bending means by using the roller, it is possible to provide a z-shaped shape capable of ensuring an appropriate reserved length on the upstream side and the downstream side of the spacer. A manufacturing apparatus that bends the apparatus and maintains the posture of the spacer in a state where the zigzag bending operation is not hindered. Further, since the spacer or the overlapping body is suspended between the guide members of the zigzag bending means in a continuous state, the guide member is moved to thereby perform zigzag bending forming, so that it can be suppressed by the guide The lead member performs a phenomenon in which the spacer or the overlap body is moved in the width direction and jumps when the spacer or the overlap body is pulled in, and the spacer member or the like is smoothly pulled by the guide member. As a result, even if the width, thickness, and surface state of the spacer or the overlap are slightly uneven Inaccurate, the accuracy of the electrode group can be sufficiently controlled within the allowable range, and the quality can be improved. In addition, the spacer or the overlap body does not need to be cut into a predetermined length before the zigzag is bent, and the predetermined zigzag bend can be performed in a continuous state, so that the yield of the spacer or the overlap can be improved as much as possible. .

According to a sixteenth aspect of the present invention, in the apparatus for manufacturing a secondary battery according to any one of the sixth to fifteenth aspect, the apparatus for producing a buffer portion is provided on a downstream side of the stabilization means a clamp for clamping a front end portion of the spacer or the stacked body, and a downstream side of the stabilization means for abutting against the spacer or the downstream side buffer roller and the position restricting roller of the overlapping body On the downstream side of the spacer or the overlapping body, a predetermined length portion of the spacer or the stacked body that is pulled in when the zigzag is bent is formed.

According to this aspect, since the spacer or the reserved length portion on the downstream side of the overlapping body which can be pulled in the Z-shaped bending on the downstream side of the stabilizing means can be formed, the formation of the spacer or the overlap can be further achieved. The improvement of the property, along with this, can increase the molding speed, so that the production time can be increased.

According to the present invention, since the position of the spacer is restricted and the transport of the spacer is guided during the zigzag bending step, when the zigzag bending means is performed, and in the zigzag bending step, for the zigzag The spacer that moves by the bending means imparts a force against the running, so that the beating of the spacer on the downstream side of the zigzag bending means can be suppressed. The improvement in formability and the accompanying increase in the molding speed can also achieve an increase in the production time during molding.

I‧‧‧ pole plate manufacturing means

II‧‧‧Isolation film supply means

III‧‧‧Development means for downstream buffer

1‧‧‧Square battery

2‧‧‧square box

3‧‧‧polar plate group

4‧‧‧Isolation film

4a‧‧‧ Valley

5‧‧‧ positive plate

6‧‧‧Negative plate

5a, 6a‧‧‧ lead parts

20‧‧‧Zigzag bending means

21‧‧‧ Guide rod

23,24‧‧‧ longitudinal frame

30‧‧‧ plate insertion means

31‧‧‧ Plate transport components

32‧‧‧ Plate transport tray

33‧‧‧Support frame

38‧‧‧ Pressing members

41‧‧‧ hanging roller

42,43,44‧‧‧Support roller

45,46‧‧‧Upstream side buffer roller

47‧‧‧Air blowing means

47A‧‧‧ upstream side

47B‧‧‧ downstream side

50,67‧‧‧ clamp

53‧‧‧Cut cutter

61‧‧‧Swing wheel

62,63,65,66‧‧‧Rollers

64‧‧‧ downstream side buffer roller

100,110,120‧‧‧ Stabilization means

Fig. 1 is a schematic perspective view showing a prismatic battery in which an electrode group according to an embodiment of the present invention is housed.

Fig. 2 is a perspective view showing a schematic configuration of an electrode group shown in Fig. 1.

Fig. 3 is a view showing a method of manufacturing an electrode group in a secondary battery manufacturing apparatus according to an embodiment of the present invention, wherein Fig. 3(a) is a plan view of a method for manufacturing an electrode group, and Fig. 3(b) is a plate. Group manufacturing means before view.

Fig. 4 (a) and (b) are schematic views showing one of the zigzag bending steps of the spacer using the manufacturing apparatus shown in Fig. 3.

Fig. 5 (a) and (b) are schematic views showing another form of the zigzag bending step using the spacer of the manufacturing apparatus shown in Fig. 3.

Fig. 6 is a schematic view showing a state of a first (initial) step of zigzag bending in the secondary battery manufacturing apparatus of the embodiment of the present invention.

Fig. 7 is a schematic view showing a state of a second step of zigzag bending in the secondary battery manufacturing apparatus of the embodiment of the present invention.

Fig. 8 is a schematic view showing a state of a third step of zigzag bending in the secondary battery manufacturing apparatus according to the embodiment of the present invention.

Fig. 9 is a view showing a stabilization means according to the first embodiment of the present invention, wherein Fig. 9(a) is a schematic view from the front, and Fig. 9(b) is a schematic view from the top, Fig. 9 (c) for the A line arrow view, Figure 9 (d) In order to extract the air discharge port and enlarge the cross-sectional view, FIG. 9(e) is a schematic view showing the first movement mode viewed from above, and FIG. 9(f) is a second movement mode viewed from above. A schematic diagram of the type.

Fig. 10 is a view showing the stabilization means of the second and third embodiments of the present invention, wherein Fig. 10(a) is a schematic view of the second embodiment viewed from the front, and Fig. 10(b) is viewed from the front. A schematic view of the third embodiment.

Fig. 11 is a view showing an example of an air blowing means according to an embodiment of the present invention, wherein Fig. 11(a) is a plan view, Fig. 11(b) is a transverse sectional view, and Fig. 11(c) is an extraction of the ionizer. Detailed display of the details.

Fig. 12 is a schematic view showing a method of manufacturing a secondary battery using the manufacturing apparatus of the embodiment of the present invention.

Fig. 13 is a schematic view showing a method of manufacturing a secondary battery using the manufacturing apparatus of the embodiment of the present invention.

Fig. 14 is a schematic view showing a method of manufacturing a secondary battery using the manufacturing apparatus of the embodiment of the present invention.

Fig. 15 is a schematic view showing a method of manufacturing a secondary battery using the manufacturing apparatus of the embodiment of the present invention.

Fig. 16 is a schematic view showing a method of manufacturing a secondary battery using the manufacturing apparatus of the embodiment of the present invention.

Fig. 17 is a schematic view showing a method of manufacturing a secondary battery using the manufacturing apparatus of the embodiment of the present invention.

Fig. 18 is a schematic view showing a method of manufacturing a secondary battery using the manufacturing apparatus of the embodiment of the present invention.

Figure 19 is a view showing a manufacturing apparatus using an embodiment of the present invention. A schematic view of a method of manufacturing a secondary battery.

Fig. 20 is a schematic view showing another electrode group produced by the manufacturing apparatus according to another embodiment of the present invention.

Fig. 21 is a view showing the relationship between the spacer supply means, the electrode group manufacturing means, and the buffer manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention in a state in which the zigzag is bent in the first (initial) step. Schematic diagram.

Fig. 22 is a schematic view showing the relationship between the spacer supply means, the electrode group manufacturing means, and the buffer manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention in the state of the second step of the zigzag bending. .

Fig. 23 is a schematic view showing the relationship between the spacer supply means, the electrode group manufacturing means, and the buffer manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention in the state of the third step of the zigzag bending. .

Fig. 24 is a schematic view showing the relationship between the spacer supply means, the electrode group manufacturing means, and the buffer manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention in the state of the fourth step of the zigzag bending. .

Fig. 25 is a schematic view showing a means for producing a downstream side buffer portion according to another embodiment of the present invention.

Fig. 26 (a) to (c) are schematic views showing means for fabricating a downstream side buffer portion according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 and 2, a prismatic battery (secondary battery) 1 belonging to a lithium ion secondary battery includes a square box 2 on the square. Box 2 contains a plate group 3. A positive terminal and a negative terminal which are not shown in the figure are provided at a predetermined portion of the square case 2. Further, in the square case 2, an electrolytic solution obtained by blending a lithium salt with an organic solvent is filled.

The electrode group 3 includes: a spacer 4 bent in a zigzag shape, and an electrode plate (for example, a positive electrode plate 5) and one electrode of the other electrode which are alternately inserted into one of the valleys 4a of the spacer 4 Board (eg negative plate 6). The positive electrode plate 5 and the negative electrode plate 6 are alternately overlapped so that the separators 4 are interposed therebetween, and the separators 4 are in a state of being flatly stacked. The positive electrode plate 5 and the negative electrode plate 6 are provided with lead portions 5a and 6a that protrude from the separator 4 toward the opposite sides, and the lead portions 5a and 6a of the respective electrodes are bundled. The lead portion 5a of the bundled positive electrode plate 5 is connected to the positive electrode terminal, and the lead portion 6a of the bundled negative electrode plate 6 is connected to the negative electrode terminal.

The electrode group 3 thus constituted is manufactured by a manufacturing apparatus of a secondary battery. In the manufacturing apparatus of the present embodiment, in order to manufacture the electrode group 3 by bending the spacer 4 into a zigzag shape, the electrode assembly manufacturing means I having the zigzag bending means and the electrode insertion means are provided, and the supply means A spacer supply means II for performing the zigzag-shaped spacer 4. Fig. 3 is a view showing the electrode assembly manufacturing means I, Fig. 3(a) is a plan view of the electrode group manufacturing means I, and Fig. 3(b) is a front view of the electrode group manufacturing means I. As shown in Fig. 3, the zigzag bending means 20 has a plurality of guide bars (guide members) 21 arranged in a zigzag shape in the vertical direction, and the details are described later, but in short, they are isolated. The sheet 4 is disposed between one row 22A of the guide bar 21 and the other row 22B, and the rows of the guide bars 21 are staggered in the horizontal direction between the rows 22A, 22B to bend the spacer 4 into a zigzag shape.

The guide bar 21 is provided in the same number as the number of the positive electrode plates 5 and the negative electrode plates 6 supplied to the separator 4, or the number of the number. The plurality of guide rods 21 are arranged horizontally in a vertical direction on the bases not shown in the two rows 22A, 22B. Further, each of the guide bars 21 is formed in a zigzag shape between the rows 22A, 22B, that is, arranged in a zigzag manner in the vertical direction. The guide bars 21 are supported in a cantilever shape on the longitudinal frames 23, 24, respectively, which are provided corresponding to each of the rows 22A, 22B.

Further, the zigzag bending means 20 is provided with a driving portion for moving the guiding rod 21 in the horizontal direction, thereby staggering between the rows 22A, 22B and bending the spacer 4 into a zigzag shape. The drive unit is constituted by, for example, a ball screw and a motor that rotates the ball screw. The drive unit including the ball screw, the motor, and the like is a general transmission means, and thus the illustration is omitted.

The electrode insertion means 30 includes one of the pair of plate transport members 31 (31A, 31B) disposed behind the respective rows 22A, 22B of the guide bars 21 constituting the zigzag bending means 20. Each of the electrode transport members 31 has a plurality of electrode transport trays 32 on which a predetermined number of positive electrode plates 5 or negative electrode plates 6 are placed. In the third embodiment, the positive electrode plate 5 is placed on the electrode transport tray 32 of the electrode transport member 31A disposed on the left side of the spacer 4, and is disposed on the electrode transport member 31B disposed on the right side of the spacer 4. The negative electrode plate 6 is placed on the electrode transport tray 32. The electrode insertion means 30 moves the plate transport tray 32 and the guide bar 21 in the horizontal direction in synchronization with the movement of the guide bar 32 to the valley 4a (refer to FIG. 2) formed in the spacer 4, whereby Positive plate 5 The negative electrode plate 6 is inserted into each of the valleys 4a alternately.

In the present embodiment, the electrode insertion means 30 includes a first electrode transport member (for example, a positive electrode plate transport member) 31A for transporting one electrode plate (for example, a positive electrode plate 5), and an electrode for transporting the other electrode. A second electrode transport member (for example, a negative electrode plate electrode transport member) 31B of a plate (for example, the negative electrode plate 6). The first plate transporting member 31A includes an electrode transport tray 32 having the same number of electrode plates (for example, the positive electrode plate 5) as the one of the electrode plates 3 required. Each of the plate transport trays 32 of the first plate transporting member 31A is disposed behind the guide bar 21 of the row 22A constituting one side so that the electrode plate mounting surface of the electrode transport tray 32 is horizontal. The back end is connected by a support frame 33A. Similarly, the second plate transporting member 31B also includes an electrode transport tray 32 having the same number of electrode plates (for example, the negative electrode plate 6) as the other electrode required for the electrode group 3 . Each of the plate transport trays 32 of the second plate transporting member 31B is disposed behind the guide bar 21 of the row 22B constituting the other side so that the electrode plate mounting surface of the electrode transport tray 32 is horizontal. And the back end is connected by the support frame 33B.

Each of the support frames 33A, 33B is connected to a piston/cylinder device that can be extended and contracted in the direction in which the positive electrode plate 5 of the electrode plate as one pole or the negative electrode plate 6 of the electrode plate as the other electrode is stretched. The piston rod 34a of 34. Further, each of the piston/actuating cylinder devices 34 is provided in a reciprocating pedestal 35 that is movable back and forth in the conveying direction of the positive electrode plate 5 or the negative electrode plate 6, respectively.

Each of the shuttle pedestals 35 is configured to be movable in the horizontal direction by a drive unit including a ball screw or the like. Specifically, each round trip The pedestal 35 is coupled to a nut 37 which is screwed to a screw shaft 36 of a feed screw rotatably provided on a machine not shown. The screw shaft 36 is rotated by a motor not shown. When the screw shaft 36 rotates, the first and second electrode plate transport members 31A, 31B move toward the spacer 4 or away from the spacer 4 in response to the rotation direction.

The left and right sides of the respective plate transporting trays 32 of the first and second electrode transport members 31A, 31B (the direction orthogonal to the moving direction of the electrode transport tray 32 in the horizontal direction with the electrode plate mounting surface) On both sides, a pair of pressing members 38 abutting on the edge of the electrode plate placed on the plate transport tray 32 are provided. Specifically, the pressing member 38 is configured to be in contact with one of the pair of longitudinal rods of the positive electrode plate 5 and the negative electrode plate 6 projecting from the left and right sides of each of the plate transport trays 32, and is attached to each of the reciprocating pedestals 35.

The spacer 4 is suspended between the opposing rows 22A, 22B of the guide bar 21 of the zigzag bending means 20 via the hanging roller 41 of the spacer supply means II.

Here, the mode in which the electrode group 3 is manufactured by using the electrode assembly manufacturing means I as described above will be described. Fig. 4 and Fig. 5 are schematic diagrams showing the type of the zigzag bending step of the spacer using the electrode assembly manufacturing means I shown in Fig. 3, respectively. As shown in Fig. 4, in a state where the spacer 4 is hung between the rows 22A, 22B of the guide bars 21 arranged in a zigzag shape, the rows 22A, 22B of the guide bars 21 are respectively directed toward the spacers. The four sides move horizontally, and as shown in Fig. 5, the guide bars 21 are staggered between the rows 22A, 22B. At this time, although not shown in the drawing, the buffer roller of the spacer supply means II is moved upward in synchronization, and the slit which is pulled into the length of the guide bar 21 is supplied. Off film 4. Therefore, the pulling of the guide bar 21 of the spacer 4 is smoothly performed in a state where the spacer 4 is substantially free from tension. The operation of the spacer supply means II will be described in detail later.

The shuttle pedestal 35 is synchronized with the movement of the guide bar 21 in the horizontal direction and is moved by the rotation of the screw shaft 36. Thereby, the first and second electrode plate transport members 31A and 31B and the pressing member 38 are moved toward the spacer 4 . The start of movement of the shuttle pedestal 35 may be simultaneously with the start of the movement of the guide bar 21, or during the movement of the guide bar 21 after the start of the movement of the guide bar 21, or at the same time as the end of the movement of the guide bar 21, or Any one of a predetermined time after the end of the movement of the guide bar 21 is completed. If the production time interval is considered, preferably at the same time as the start of the movement of the guide bar 21, or after the start of the movement for a short period of time and during the movement of the guide bar 21, the timing can be detected for synchronous movement. As a result, the guide bars 21 are alternately moved between the rows 22A and 22B in the horizontal direction, and the first and second electrode plate transporting members 31A and 31B and the pressing member 38 are directed toward the valley formed by the spacer 4. Move in the horizontal direction within 4a. The positive electrode plate 5 of each of the electrode transport trays 32 of the first electrode transport member 31A and the negative electrode plate 6 of each of the electrode transport trays 32 that are previously mounted on the second electrode transport member 31B are inserted in the same manner. It is bent into each of the valleys 4a of the zigzag spacer 4 . As a result, a laminate in which the positive electrode plate 5 and the negative electrode plate 6 are alternately overlapped via the separator 4 is formed. Then, the guide bar 21 is pulled out from each of the valleys 4a of the spacer 4, and the pressing member 38 is left to move the first and second plate conveying members 31A, 31B away from the spacer 4 to form a positive electrode plate. 5 and the negative electrode plate 6 remain in each of the valleys 4a of the separator 4, and the positive electrode plate 5 and the negative electrode are formed. The laminate 6 is alternately laminated with the separator 4 interposed therebetween. This layer body is formed by pressing (pressing and pressing) the lamination direction of the positive electrode plate 5 and the negative electrode plate 6 by a predetermined pressing means (not shown) to form the electrode group 3.

Fig. 6 is a view showing the relationship between the spacer supply means, the electrode group manufacturing means, and the buffer manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention in a state in which the zigzag is bent in the first (initial) step. Schematic diagram. Hereinafter, in the same manner, Fig. 7 is a schematic view showing the state of the second step of bending in a zigzag shape. Fig. 8 is a schematic view showing the state in the third step.

Fig. 6 is a view showing that the laminated body (described later in detail) formed by the predetermined forming step of the spacer is cut away, and the clamp 50 composed of the jaw members 50A, 50B is moved to the clampable spacer 4. After the position of the front end portion, the state of the front end portion of the spacer 4 is clamped at the moving position. This state is an initial state of the electrode group manufacturing means 1 which is the upstream side buffer producing means which forms the reserved length portion of the spacer 4 on the upstream side of the zigzag bending means 20. On the other hand, in the spacer supply means II, the upstream side buffer rollers 45, 46 (hereinafter also referred to simply as the buffer rollers 45, 46) located at the fourth position as the most raised position are lowered, and the roller member 40 is rotated. The separator 4 is pulled out and is in an initial state. More specifically, the spacer 4 is rotatably supported as a rotating shaft 48 for holding the holding portion of the roller member 40 as a roller member 40 wound in a roller shape. Between the roller member 40 and the hanging roller 41, the support rollers 124, 43, 44 and the central axis are formed as buffer rollers 45, 46 which are movable in the vertical direction. Buffer roll The wheels 45, 46 are disposed between the support rollers 42, 43, 44. As shown in Fig. 6, in the horizontal direction in the figure, the support rollers 42, 43, 44 are alternately arranged with the buffer rollers 45, 46. Further, the movable roller 49 which is moved to the side of the hanging roller 41 and holds the spacer 4 together with the hanging roller 41 is also shown in the figure. The operation and function of the movable roller 49 will be described later. Further, on the downstream side of the hanging roller 41, two rollers 62, 63 are sequentially disposed from the upstream side along the hanging direction of the spacer 4 and on the left side of the spacer 4, and further, the rollers 62, 63 are disposed. A swinging roller 61 is disposed on the right side of the spacer 4, respectively. The swinging roller 61 and the rollers 62, 63 will also be described later.

Further, in the present embodiment, the stabilization means 100 is disposed on the downstream side of the zigzag bending means 20. The stabilizing means 100 is disposed on the downstream side of the zigzag bending means 20 which is on the opposite side of the zigzag bending means 20 with respect to the hanging roller 41. This is in the zigzag bending step, when pulled into the zigzag bending means 20, the position of the spacer 4 is restricted and the transport of the spacer 4 is guided, and in the zigzag bending step, the The zigzag bending means 20 moves the spacer 4 to travel against the force. Further, the runout of the separator 4 at the time of molding and the like are reduced as much as possible. The stabilization means 100 and this specific configuration will be described in detail later.

Fig. 7 is a view showing the state of the previous step of zigzag bending of the spacer. In this previous step, the rows 22A, 22B of the guide bar 21 are separated from each other, and the spacer 4 is suspended between the rows 22A, 22B via the hanging rollers 41. This state is formed by the following actions. As shown in FIG. 6, the spacer 50 can be pulled out to the stabilizing means 100 by lowering the clamp 50 holding the front end of the spacer 4 by the jaw members 50A, 50B toward the hanging direction of the spacer 4. The downstream side.

In this previous step, as the clamp 50 is lowered, the buffer rollers 45, 46 are raised to the second position (the lower center position) shown in Fig. 7. Due to this rise, the spacer 4 of the length which is pulled out due to the lowering of the clamp 50 can be compensated. Here, the clamp 50 that has been lowered to the most descending position moves to the front side or the inner side of the paper surface in FIG. 7 and rises, and prepares for the next processing. In other words, the gripper 50 moves in the vertical direction between the upper and lower predetermined positions of the zigzag bending means 20 in the state of drawing a continuous track-like trajectory of a slender track shape.

Fig. 8 is a view showing that the rows 22A, 22B of the guide bars 21 of the zigzag bending means 20 are moved in the approaching direction to bend the spacer 4 into a zigzag shape, and the positive electrode plate 5 and the negative electrode plate 6 are alternately inserted. The state between the spacers 4 after the zigzag bending is performed. At this time, the buffer rollers 45, 46 are moved to the third position (the uppermost position) shown in Fig. 8 in synchronization with the movement of the rows 22A, 22B of the guide bars 21. Due to the rise of the buffer rollers 45, 46, a predetermined length of the length corresponding to the length of the spacer 4 from the support roller 44 to the leading end of the hanging roller 41 can be supplied. That is, the reserved lengths of the spacers 4 held by the support rollers 42, 43, 44 and the buffer rollers 45, 46 when the buffer rollers 45, 46 are lowered to the most lowered position are bent in the zigzag of the spacer 4. The folding time corresponds to the amount of the spacer 4 that is horizontally pulled by the guide bar 21. Further, the electrode assembly unit I as the upstream side buffer manufacturing means is formed in the reserved length portion of the spacer 4 on the upstream side of the zigzag bending means 20, and the Z is formed in accordance with the zigzag bending means 20. The glyph is formed by bending and is mainly absorbed in the upper portion of the zigzag bending means 20.

On the other hand, it is formed by pulling out to the lower side of the stabilization means 100. The reserved length portion of the spacer 4 is equivalent to the amount of the spacer 4 that is horizontally pulled by the guide bar 21 when the zigzag of the spacer 4 is bent. And the reserved length portion of the spacer 4 formed on the downstream side of the zigzag bending means 20 is mainly absorbed by the zigzag bending means as the Z-shaped bending is formed according to the zigzag bending means 20. The lower part of 20. When the reserved length portion of the spacer 4 is moved to the zigzag bending means 20, the stabilizing means 100 not only limits the position of the rising spacer 4, but particularly limits the position in the width direction and guides the spacer 4 The transport, and for the raised spacers, imparts a force against the movement of the spacers. By applying this force, even if tension is applied, the pulling operation of the spacer 4 can be stabilized. Therefore, the jitter of the spacer can be suppressed. Further, the improvement in formability can be attained, and along with this, the molding speed can be increased, so that the production time at the time of molding can be improved.

Thus, the stabilizing means 100 is beneficial to the stability of the transport of the spacer 4 in the step of FIG. The specific configuration of the stabilization means 100 will be described below.

Fig. 9 is a view showing a stabilization means according to the first embodiment of the present invention, wherein Fig. 9(a) is a schematic view from the front, and Fig. 9(b) is a schematic view from the top, Fig. 9 (c) is an arrow view of the A line, Fig. 9 (d) is a cross-sectional view in which the air discharge port is extracted and enlarged, and Fig. 9 (e) is a schematic view showing the mode of the first movement mode viewed from above. Fig. 9(f) is a schematic view showing a pattern showing the second movement mode as viewed from above. As shown in the figures, the stabilizing means 100 of the present embodiment has the flat plate portion 101, the guiding members 102A, 102B, the air discharge port 103, and the cover member. 104. The flat plate portion 101 is a plate-like member that is disposed on one side of the spacer 4 that is suspended from the hanging roller (for example, FIG. 6; the same applies hereinafter) along the hanging direction, and is in the spacer 4 One side is used to limit the position of the spacer 4 in the thickness direction. The guiding members 102A, 102B are two guiding members that are fixed to the flat plate portion 101 and protrude toward the spacer 4 and extend toward the moving direction of the spacer 4, and by the end of the spacer 4 The portion abuts on the inner circumferential surface of each of the guide members to guide the position of the spacer 4 in the width direction and guide the same. Therefore, the interval between the left and right guide members 102A, 102B in the width direction of the spacer 4 is formed to be slightly larger than the width of the spacer 4. The flat plate portion 101 and the guiding members 102A, 102B can be integrally molded by one member, but it is easy to adjust the interval between the guiding member 102A and the guiding member 102B, the flat plate portion 101 and the guiding members 102A, 102B, Preferably, it is formed of different members as in the present embodiment. Specifically, in the air discharge port 103, as shown in FIG. 9(d), the portion is taken out and enlarged, and the air discharge port 103 is formed to penetrate the portion of the flat plate portion 101, and is opposite to the separator 4 of the flat plate portion 101. It is formed to be inclined downward toward the side of the spacer 4 . Further, the air supplied from the opposite side of the spacer 4 is ejected obliquely downward to the flat plate portion 101. As a result, even if the air component which is directed vertically downward in the air which is ejected obliquely downward is raised by the zigzag bending means, the rising speed of the spacer 4 can be suppressed. This result can achieve stabilization of the molding. Here, of course, the air ejected toward the separator 4 can be configured as ionic air, and when the ion air is discharged, the static electricity of the separator 4 can be simultaneously eliminated. The air discharge port 103 allows the air to be perpendicularly supplied to the surface of the spacer 4 even toward the spacer 4 side. While the ascending speed of the spacer 4 is suppressed, it is preferable that the air is blown obliquely downward toward the spacer 4 as described above, considering the difficulty in adjusting the supply angle of the air.

When the tension applied to the spacer 4 is too small, the jitter of the spacer 4 cannot be suppressed, and when it is too large, it may cause the zigzag bending means to stop when the zigzag is bent and formed. In the case of zigzag bending, it is necessary to perform a confirmation test for the degree of tension applied to the separator. In the experiment, the tension was applied to the separator on the lower side and zigzag bending was performed, and it was visually examined whether the portion of the activated material sandwiched between the electrodes bent between the zigzag spacers in the completed electrode group was It is completely covered by the separator, and even if the activated material portion of the electrode oozes a little, it is judged that the separator is deviated. For each tension, zigzag bending was separately formed, and 30 plate groups were produced. The results are shown in the table below.

From this result, it is understood that when a tension of 10 mN or more is applied to the separator at the time of zigzag bending forming, zigzag bending forming can be stably performed.

Further, when the tension applied to the spacer 4 exceeds 500 mN, the zigzag bending forming device is stopped. This can be seen as an excessive tension acting on the inside, which causes the safety device in the zigzag bending means to act. From this result, it is understood that the tension applied to the separator 4 is preferably suppressed to 500 mN or less.

The tension applied to the separator can be appropriately set within the above range, and can be set by appropriately adjusting the length of the separator, the flow rate of the air, the flow rate, and the like.

Further, in the movable portion in the stabilization means 100, the cover member 104 is disposed on the opposite side of the flat plate portion 101 with respect to the spacer 4, and is formed to be movable toward the flat plate portion 101. In this manner, together with the flat plate portion 101 and the two guiding members 102A and 102B, a space in which the cross-sectional shape of the spacer 4 is rectangular is formed. The cover member 104 restricts the position of the spacer 4 in the thickness direction on the other side of the spacer 4. Here, as shown in FIGS. 9(e) and (f), the cover member 104 is configured to have a size that allows access to the space formed by the guiding members 102A, 102B. Further, it can be formed by moving the driving means such as the air cylinder 105 to the direction of the flat plate portion 101. Here, the cover member 104 of the present embodiment has the first and second movement modes in which the amount of movement when moving toward the flat plate portion 101 is different, and in the first movement mode, the cover member 101 and the second guide are used. The lead members 102A, 102B together form a space in which the cross-sectional shape of the spacer 4 is rectangular. At the end of the zigzag bending step by the zigzag bending means, the second movement mode is moved further toward the flat plate portion 101 side, and the spacer 101 is sandwiched between the flat plate portions 4 and clamped.

According to the present embodiment, the flat portion 101, the two guiding members 102A, 102B, and the cover member 104 can form a space in which the spacer sheet 4 has a rectangular cross-sectional shape, and the spacer 4 is inserted through the space. The space, in conjunction with the guiding function of the guiding members 102A, 102B, allows the flow and transport of the spacer 4 to proceed smoothly. Furthermore, since facing from the spacer 4 The air discharge port 103, which is inclined downwardly, ejects the air obliquely downward, whereby the zigzag bending step can be a resistance to the upward movement of the spacer 4 sucked into the zigzag bending means. The suction operation of the separator 4 is moderately retarded to ensure the stability of travel, and good formability can be ensured.

Furthermore, since the spacer 4 can be clamped and clamped in the second movement mode, at the end of the zigzag bending step, the guide bar 21 is pulled out even from the zigzag-shaped spacer 4 (for example, reference) Fig. 8), the slack of the spacer 4 is not generated, and a series of operations can be performed satisfactorily.

Fig. 10 is a view showing the stabilization means of the second and third embodiments of the present invention, wherein Fig. 10(a) is a schematic view of the second embodiment viewed from the front, and Fig. 10(b) is viewed from the front. A schematic view of the third embodiment. As shown in Fig. 10(a), the stabilizing means 110 of the present embodiment is constituted by the flat plate portion 111, the moving member 112, and the pressing member 113. Here, the flat plate portion 111 is a plate-shaped flat plate portion that is disposed on one side of the spacer 4 that is suspended from the hanging roller 41 and that is disposed in the hanging direction. Further, the moving member 112 is disposed on the opposite side of the flat plate portion 111 with respect to the spacer 4, and is formed to be close to/separated from the flat plate portion 111 by a moving means not shown in the drawing. The way moves horizontally. The pressing member 113 fixes the base end portion to the moving member 112, and is formed to extend upward in the hanging direction of the spacer 4, and the front end portion is elastically abutted against the spacer 4. And the distance from the flat plate portion 111 is adjusted by the movement of the moving member 112, whereby the front end of the pressing member 113 is adjusted to contact the spacer 4 with a desired pressing force. That is, in the present embodiment, the moving member 112 is moved. In the moving means, the two-stage air cylinder similar to that of the first embodiment can be applied, whereby the pressing force for bringing the pressing member 113 into contact with the spacer 4 can be changed to two stages, and each stage can be separately It is set as either of a stable traveling mode for suppressing unstable traveling such as jitter during movement of the spacer 4, and a clamp mode for completely damaging movement of the spacer 4.

As shown in Fig. 10(b), the stabilization means 120 of the third embodiment is composed of one pressing roller 121 and two position regulating rollers 122, 123. The position restricting rollers 122, 123 are disposed in plural (two in this example) so as to be along the hanging direction of the spacer 4 and on one side of the spacer 4. On the other hand, on the other side of the spacer 4, a pressing roller 121 is disposed between the position regulating rollers 122, 123. The roller 121 is pressed to move toward the other side of the spacer 4 by the motor 124 as a driving means. As a result, the spacer 4 is abutted by the movement, and the spacer 4 is pressed against the position restricting rollers 122, 123 with a predetermined pressure. Therefore, by appropriately adjusting the pressing force in the pressing function of the pressing roller 121 formed by the driving of the motor 124, similarly to the first and second embodiments, it is possible to provide a stable traveling mode for suppressing unstable traveling. And any of the clamping modes that completely clamp the movement of the spacer 4. Further, according to the present embodiment, by adjusting the pressing amount of the pressing roller 121, the desired tension can be accurately imparted to the spacer 4.

Further, in the present embodiment, the air blowing means 47 for blowing the air from the lower surface side of the spacer 4 to support the spacer 4 is disposed between the support roller 44 and the hanging roller 41 which are the most downstream of the support rollers. By providing the air blowing means 47, since the physical contact can be avoided as much as possible Since the spacer 4 is supported, the predetermined conveyance of the spacer 4 can be performed satisfactorily. Here, since the air blown from the air blowing means 47 is configured as ionic air, the charging of the separator can be prevented or removed by the static electricity eliminating effect of the ionic air, so that the zigzag bending step can prevent the cause Adsorption by the electrostatic force of the adjacent spacers.

Fig. 11 is a view showing an example of the air blowing means 47. Fig. 11(a) is a plan view, Fig. 11(b) is a transverse sectional view, and Fig. 11(c) is a detailed detail showing the extraction of the ionizer. Figure.

As shown in Fig. 11, the air blowing means 47 has a wall portion 69 that restricts the position of the spacer 4 in the width direction, a flat plate portion 70 on which the rib members 70A, 70B, 70C, 70D are disposed, and a flat plate portion 70. The central portion has an elongated hole 70E extending in the aforementioned conveying direction, and ejects ion air through the elongated hole 70E, and the rib members 70A, 70B, 70C, 70D are oriented in the conveying direction of the spacer 4 (Fig. 11 (a The upper and lower directions indicated by the arrows; the same as the above) are extended and dispersed in the width direction, so that the lower surface of the spacer 4 abuts against the top of the rib members. That is, the ionizer 71 shown in Fig. 11(c) ejects ionized air from the long hole 70E via the nozzle 71A at the top thereof.

Moreover, the charging of the spacer 4 can be prevented or removed by the static elimination effect of the ionic air, so that in the zigzag bending step, the adsorption due to the electrostatic force of the adjacent spacer can be prevented. Here, since the spacer 4 restricts the position in the width direction by the wall portion 69, it can be satisfactorily transported along a predetermined transport path without causing a meandering or jumping. And the spacer 4 is in contact with the rib members 70A to 70D, and the contact area can be reduced as much as possible to form a line contact, so the static electricity is performed according to the ion air. After the elimination, it is not charged again due to the friction with the rib members 70A to 70D.

The air blowing means 47 is not necessarily required, but by adopting this configuration, the physical contact portion with the spacer 4 can be reduced as much as possible by the case where the spacer 4 is supported by the roller. Incidentally, the spacer 4 is pulled out from the roller member 40, and is transported to the electrode group manufacturing means I in a state of being in contact with a roller or the like, so that the friction is caused by the pulling or contact with the roller. The spacer 4 is charged. In this state, in the charged state, due to static electricity, the guide portion 4 contacts the guide portion (not shown) for specifying the transport direction during transport, so that the transport is not performed in the correct direction, or the adjacent connection is caused. The spacers 4 are attracted to each other, and the pulling of the spacers 4 by the movement of the guide bars 21 cannot be smoothly performed. Therefore, blowing a gas such as ionic air to prevent charging and static elimination as the gas to be blown not only prevents the separator 4 from being charged, but also electrostatically cancels the charged separator 4. The blowing of the air from the air blowing means 47 can be carried out at any time, or can be controlled when the separator 4 is transported or before and after the transport, and the blowing is stopped when it is not transported for a while. When it is configured to be blown out at any time, static elimination can be reliably performed on the entire separator 4 to be transported. Therefore, it is expected to more reliably suppress the adsorption of the adjacent separators 4, and if the blowing is controlled in accordance with the conveyance condition, By reducing the unnecessary ionic air blowing operation, it is possible to suppress the possibility of adverse effects such as deformation of the separator 4 due to continuous blowing of ion air to the same portion for a long period of time.

Furthermore, the support roller 44 of the present embodiment is disposed in the vertical direction. The position is lower than the position in the vertical direction of the hanging roller 41. In cooperation with this, the air blowing means 47, 68 are such that the air blowing surface is parallel to the lower surface of the spacer 4 so that the downstream side 47B of the discharge side of the spacer 4 is positioned above the upstream side 47A of the supply side. And it is arranged obliquely in the upper right direction as shown in the figure. Thereby, the kinetic energy of the travel of the spacer 4 accompanying the support roller 44 toward the hanging roller 41 can be converted into potential energy and braked. As a result, even if the spacer 4 is pulled in sharply in the zigzag bending step, it can be stopped well at a predetermined position.

Here, a method of manufacturing a secondary battery using the manufacturing apparatus of the secondary battery of the present embodiment will be described with reference to FIGS. 12 to 19. Fig. 12 is a schematic view showing a method of manufacturing an electrode group using the manufacturing apparatus of the secondary battery of the present embodiment. This figure shows the initial state after completion of the manufacture of the electrode group 3 in the previous step. In the initial state, the front end portion of the spacer 4 that was cut in the previous step is suspended from the hanging roller 41. At this time, the movable roller 49 moves in the direction of the hanging roller 41, and in the state in which the spacer 4 is held by the hanging roller 41 and the movable roller 49, the spacer supply means II follows the buffer roller 45, 46. (Refer to Fig. 6; the same applies hereinafter), the roller member 40 is rotated and the spacer 4 is pulled out to be in the state shown in Fig. 6(a). Further, at this time, the opposing rows 22A, 22B of the electrode group manufacturing means I are separated.

As shown in Fig. 13, from this state, the movable roller 49 is moved away from the hanging roller 41, the spacer 4 is held, and the jaw members respectively disposed on the double-sided side are used. The clamp 50 composed of 50A, 50B holds the front end portion of the spacer 4. Pressing member 51, system and The pressing member 52 of Fig. 16 is used for pressing the laminated body of the separator 4 in which the electrode plate is inserted in the valley portion bent in a zigzag shape to form the electrode group 3.

Then, in the state of Fig. 7, in a state where the roller member 40 is rotated and the spacer 4 is pulled out, as shown in Fig. 14, the clamp 50 of the state of the front end portion of the spacer 4 is clamped (at the 14th) The figure is not shown) moving downward, and is pulled down in such a manner that the spacer 4 is disposed between the rows 22A and 22B. Then, the clamped state of the jaw members 50A, 50B is released. Further, although not shown, the clamp 50 is moved to the front side or the inner side in FIG. 14 to be raised, and is operated in the next processing.

As shown in Fig. 15, from this state, the respective guide bars 21 are moved in the horizontal direction so that the rows 22A, 22B intersect each other in the guide bar 21. At this time, the buffer rollers 45, 46 of the spacer supply means II are moved to move upward. By this movement, the spacer 4 having a length twice the added value of the respective movement amounts of the buffer rollers 45, 46 can be pulled out as a reserved length portion on the upstream side of the zigzag bending means, so that the supply can be supplied to the equivalent length. The spacer 4 is pulled into the length of the guide bar 21. Therefore, the pulling of the spacer 4 by the guide bar 21 and the zigzag bending can be performed smoothly. In particular, in the present embodiment, the spacer 4 is not cut by the spacer supply means II, but can be bent in a zigzag shape in a continuous state, and the spacer 4 is pulled out to the lowering means 100 to ensure Z. The reserved length portion on the downstream side of the glyph bending means, and the position of the spacer 4 to be pulled out is restricted by the stabilizing means 100, so that when the spacer 4 is pulled in according to the guide bar 21, The spacer 4 can be suppressed as much as possible to the width The phenomenon of jumping to the movement. In addition, since the tension is imparted to the spacer by air or the like by the stabilizing means 100, the jitter of the spacer 4 can be more effectively suppressed.

After the zigzag bending of the spacer 4 is completed, the positive electrode plate 5 and the negative electrode plate 6 are alternately inserted between the spacers 4 bent into a zigzag shape in the same manner as explained in the fifth drawing. A laminate of the positive electrode plate 5 and the negative electrode plate 6 sandwiching the separator 4 is formed. At the same time, the pressing member 51 is lowered from above the laminated body and abuts against the upper surface of the laminated body, and is in a state as shown in Fig. 16.

In the state shown in Fig. 16, the same pressing member 52 is raised from below and abuts against the lower surface of the laminated body.

Further, as shown in Fig. 17, the laminated members are held by the pressing members 51, 52 from above and below. From this state, the guide bar 21 is retracted and the first and second plate conveying members 31A, 31B are retracted. Then, the laminated body is raised by the pressing members 51, 52, and the movable roller 49 is moved in the direction of the hanging roller 41, and the spacer 4 is held by the hanging roller 41 and the movable roller 49, and Between the rollers 62, 63, the swing roller 61 is pressed against one of the faces (the right side in the drawing) of the spacer 4 to impart a predetermined tension to the spacer 4 between the hanging roller 41 and the uppermost portion of the laminated body. Further, in a state where the slack of the spacer 4 is removed, as shown in Fig. 18, the end portion of the spacer 4 is cut away by the cutter 53 at a predetermined position above. The laminated body after the cutting is formed into the electrode group 3 to become a product. For the tension of the swinging roller 61, the swinging roller 61 can be preferably pulled by the air cylinder 81 to the left side in the drawing. Air cylinder 81, as available as a compression stream The cushioning effect by the elasticity of the air of the body imparts a predetermined tension, and is therefore most suitable as the tension applying means.

On the other hand, as shown in Fig. 17, when the guide bar 21 is retracted, the spacer 4 on the downstream side of the electrode assembly manufacturing means 1 is loosened. In contrast, in the present embodiment, the spacer 4 is clamped by the clamping function of the stabilization means 100 to prevent the occurrence of slack at this time. Specifically, for example, in the stabilizing means 100 shown in FIG. 9, as shown in FIG. 9(f), the air cylinder 105 is driven to press the cover member 104 against the spacer 4 as the second movement mode, and It is sandwiched between the flat plate portion 101 and the flat plate portion 101.

As a result of cutting off the laminated body, as shown in Fig. 19, the jaw members 50A, 50B are moved to the position where the front end portion of the spacer 4 can be held, and the electrode group manufacturing means I becomes the one shown in Fig. 12. The same initial state.

Fig. 20 is a schematic view showing an electrode group according to another embodiment of the present invention. As shown in the figure, the electrode assembly 3A of the present embodiment is configured as a laminate including the superposed body 100 and the positive electrode plate 5; wherein the superposed body 100 is bent into a zigzag continuous shape, and the positive electrode plate 5 is formed. Inserted into each of the valleys 100a of the superposed body 100. The superposed body 100 is a laminated body formed by sandwiching the negative electrode plate 6A with two sheets of the separator 4A. Therefore, the positive electrode plate 5 inserted into each of the valleys 100a of the superposed body 100 faces the negative electrode plate 6A via the separator 4A.

In the configuration of the present embodiment, as in the above-described embodiment described with reference to FIGS. 3 to 22, the positive electrode plate 5 and the negative electrode plate 6 are provided with lead portions 5a, 6a which protrude from the spacer 4A toward the opposite sides. Refer to Figure 2). Further, the lead portions 5a, 6a of the respective electrodes are bundled and respectively connected to The positive terminal and the negative terminal, which are not shown in the figure of the square box 2 (refer to Fig. 1).

The manufacturing apparatus for manufacturing the electrode assembly 3A basically has the same configuration as the above-described embodiment shown in Fig. 3. However, instead of the spacer 4, the spacer 100 is supplied from the spacer supply means II, and is arranged in a zigzag shape. Between the rows 22A, 22B of the guiding rod 21 of the bending means 20. Further, at the same time, each member of the first and second electrode plate transport members 31A and 31B transports the positive electrode plate 5 into the valley 100a of the superposed body 100.

According to this aspect, it is only necessary to form the valley 100a into which only the positive electrode plate 5 is inserted in the superposed body 100. Therefore, when the electrode group 3A having the same performance as the electrode group 3 of the above-described embodiment is manufactured, the number of the valleys 100a of the stacked body 100 is sufficient as compared with the above-described embodiment. Therefore, the number of the guide bars 21 or the plate transport trays 32 and the like can be reduced to approximately half, and the effect of further shortening the production time can be achieved.

The superposed body 100 of the present embodiment is a laminated body formed by sandwiching the negative electrode plate 6A with two separators 4A. However, the positive electrode plate 5 may be sandwiched between the positive electrode plates 5 and the negative electrode plates 6A. At this time, each member of the first and second electrode plate transporting members 31A and 31B transports the negative electrode plate 6 into the valley 100a of the superposed body 100.

21 to 24 are schematic views of a secondary battery manufacturing apparatus according to another embodiment of the present invention. Fig. 21 is a view showing the relationship between the spacer supply means, the electrode group manufacturing means, and the buffer manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention in a state in which the zigzag is bent in the first (initial) step. Schematic diagram. Figure 22 shows the zigzag bend The state of the second step is a schematic view showing the relationship between the spacer supply means, the electrode group manufacturing means, and the buffer manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention. Fig. 23 is a schematic view showing the relationship between the spacer supply means, the electrode group manufacturing means, and the buffer manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention in the state of the third step of the zigzag bending. . Fig. 24 is a schematic view showing the relationship between the spacer supply means, the electrode assembly manufacturing means, and the buffer portion manufacturing means in the secondary battery manufacturing apparatus according to the embodiment of the present invention in a state in which the zigzag is bent in the fourth step. .

As shown in Fig. 21, in the present embodiment, with respect to the configuration of Fig. 6, the upstream side cushioning means is provided for the drawing at the time of molding of the spacer 4 on the upstream side of the zigzag bending means 20. In the downstream side of the zigzag bending means 20 (the downstream side of the stabilization means 100), the downstream side buffer manufacturing means III (hereinafter also referred to as the drawing of the spacer 4) Only the downstream side buffer manufacturing means III) is disposed on an extension line hanging in the hanging direction of the spacer 4 of the hanging roller 41. More specifically, the buffer manufacturing means III has two rollers 65, 66 disposed on the same line on the left and right sides of the suspended spacer 4, and is separated between the rollers 65, 66. The downstream side buffer roller 64 (hereinafter also referred to simply as the buffer roller 64) disposed on the right side of the sheet 4, and the clamp 67 composed of the jaw members 67A, 67B.

Fig. 22 is a view showing the state of the previous step of zigzag bending of the spacer. In this previous step, the rows 22A, 22B of the guide bar 21 are separated from each other, and the spacer 4 is suspended between the rows 22A, 22B via the hanging rollers 41. This state It is formed by the following actions. As shown in Fig. 21, the front end of the spacer 4 is transferred to the clamp 67 by lowering the clamp 50 holding the front end of the spacer 4 by the jaw members 50A, 50B toward the hanging direction of the spacer 4. . As a result, the spacer 4 is passed between the buffer roller 64 and the two rollers 65, 66, and the front end portion of the spacer 4 is clamped by the jaw members 67A, 67B.

In this previous step, as the clamp 50 is lowered, the buffer rollers 45, 46 are raised to the second position (the lower center position) shown in Fig. 22. Due to this rise, the spacer 4 of the length which is pulled out due to the lowering of the clamp 50 can be compensated. Here, the clamp 50 that has been lowered to the most lowered position transmits the distal end of the spacer 4 to the clamp 67, moves up to the front side or the inner side in FIG. 22, and rises, and prepares for the next process. In other words, the clamp 50 moves in the vertical direction between the upper and lower predetermined positions of the zigzag bending means 20 in the state of drawing a continuous track-like track of a slender track shape.

Fig. 23 also shows the state of the previous step of the zigzag bending of the spacer. In the previous step, as in the case shown in Fig. 22, the rows 22A, 22B of the guide bar 21 are separated from each other, and the spacer 4 is suspended between the rows 22A, 22B via the hanging rollers 41.

In this step, the reserved length portion on the downstream side of the spacer 4 is formed by the buffer manufacturing means III before the zigzag bending step of the spacer 4 by the zigzag bending means 20. Specifically, as shown in Fig. 22, the buffer roller 64 is moved in the horizontal direction (leftward direction in the drawing) while the front end portion of the spacer 4 is held by the clamp 67, whereby the spacer 4 is moved toward the spacer 4 Pull out horizontally. Along with this, the buffer rollers 45, 46 for covering the spacer 4 which is pulled in the horizontal direction are from the second position shown in Fig. 22. (the position below the center) rises to the third position (center upper position) shown in Fig. 23. Due to this rise, although a reserved length is generated on the spacer 4 hanging from the hanging roller 41, the reserved length portion can be absorbed by moving the buffer roller 64 to the left in the drawing, thereby securing the zigzag shape. The reserved length portion of the zigzag bend in the bending step. Here, as the cushioning roller 64 is moved in the horizontal direction, the spacer 41 is pulled out from the hanging roller 41, but the transport of the pulled-out spacer 4 can be guided by the stabilizing means 100. The function does not occur well without jumping or the like.

Fig. 23 is a view showing that the rows 22A, 22B of the guide bars 21 of the zigzag bending means 20 are moved in the approaching direction to bend the spacers 4 into a zigzag shape, and interact with the spacers 4 bent in a zigzag shape. The state of the positive electrode plate 5 and the negative electrode plate 6 is inserted. At this time, the buffer rollers 45, 46 are synchronized with the movement of the rows 22A, 22B of the guide bar 21, and rise from the third position (center upper position) shown in Fig. 23 to the fourth position shown in Fig. 24 (most Upper position). Due to the rise of the buffer rollers 45, 46, a predetermined length of the length corresponding to the length of the spacer 4 from the support roller 44 to the leading end via the hanging roller 41 can be supplied. That is, the reserved length of the spacer 4 held by the support rollers 42, 43, 44 and the buffer rollers 45, 46 when the buffer rollers 45, 46 are lowered to the most lowered position corresponds to the Z of the spacer 4 The amount of the spacer 4 that is horizontally pulled by the guide bar 21 when the glyph is bent. Further, the electrode assembly unit I as the upstream side buffer manufacturing means is formed in the reserved length portion of the spacer 4 on the upstream side of the zigzag bending means 20, and the Z is formed in accordance with the zigzag bending means 20. The glyph is formed by bending and is mainly absorbed in the upper portion of the zigzag bending means 20.

On the other hand, the buffer roller 64 is synchronized with the movement of the rows 22A, 22B of the guide bar 21, and from the state shown in Fig. 23, horizontally opposite to the case shown in Fig. 23 (in the figure) Moving in the right direction, the reserved length portion of the spacer 4 made by the movement of the buffer roller 64 corresponds to the spacer which is horizontally pulled by the guiding rod 21 when the zigzag of the spacer 4 is bent. The amount of 4. Further, by the downstream side buffer manufacturing means III, the reserved length portion of the spacer 4 formed on the downstream side of the zigzag bending means 20 is formed by zigzag bending according to the zigzag bending means 20. It is absorbed in the lower portion of the zigzag bending means 20. When the reserved length portion of the spacer 4 is moved to the zigzag bending means 20, the stabilizing means 100 not only restricts the position of the spacer 4, but particularly limits the position in the width direction and guides the transport of the spacer 4. And for the rising spacer, the movement of the spacer is given a force against the travel. Thereby, even if the reverse tension is received, the pulling operation of the spacer 4 can be stabilized. Therefore, the runout of the spacer can be suppressed, and the formability can be further improved, and the molding speed can be increased with this, so that the production time can be improved.

Further, as shown in Figs. 21 to 24, the air blowing means 68 is also disposed below the spacer 4 which moves along the movement path of the buffer roller 64. The configuration of the air blowing means 68 is the same as that of the air blowing means 47 shown in Fig. 11. By providing the air blowing means 68, the spacer 4 can be supported in a form in which physical contact is avoided as much as possible, so that the predetermined conveyance of the spacer 4 can be favorably performed. Here, by arranging the air blown from the air blowing means 68 into ionic air, it is possible to The static elimination effect of the sub air prevents or removes the charging of the spacer, so that in the zigzag bending step, the adsorption due to the electrostatic force of the adjacent spacers can be prevented.

Fig. 25 is a schematic view showing a means for producing a downstream side buffer portion according to another embodiment of the present invention. As shown in Fig. 25, in the buffer portion forming means IV, a plurality of (two in the figure) buffer rollers 75, 76 are disposed between the roller 65 and the roller 66. Thus, by providing the plurality of buffer rollers 75, 76, the reserved length portion of the spacer 4 produced by each of the buffer rollers 75, 76 can be shortened. That is, since the horizontal dimension of each of the reserved length portions can be shortened, the suction of the spacer 4 in the zigzag bending step by the zigzag bending means 20 can be effectively prevented (the spacer The movement of 4), etc. That is to further improve the formability. In addition, the size of the device in the horizontal direction can also be reduced.

Fig. 26 is a schematic view showing a means for producing a downstream side buffer portion according to another embodiment of the present invention. As shown in Fig. 26, in the buffer portion forming means V, the buffer roller 80 is moved up and down along the spacer 4 suspended from above. Further, as shown in Fig. 14(a), the front end of the spacer 4 is clamped by the clamp 67, and then the clamp 67 is caused to face the spacer 4 toward the side of the buffer roller 80 (left side in the drawing). By moving, the crank portion bent by the buffer roller 80 is formed as shown in Fig. 14(b). Then, as shown in Fig. 14(c), by lowering the buffer roller 80, a reserved length portion due to the amount of drop is produced. In the zigzag bending step, when the reserved length portion is pulled in by the zigzag bending means 20, the buffer roller 80 is raised.

In the buffer portion manufacturing means V, the buffer roller 80 does not face horizontally The movement is only in the vertical direction, so that when the predetermined reserved length portion is formed, the movement of the most smooth spacer 4 can be ensured, and in particular, the formability can be improved.

(industrial applicability)

The present invention is effective in the industrial field of manufacturing an emergency power supply system using a secondary battery as an emergency power supply device such as an electronic device, or in an industrial field of manufacturing an electric vehicle using a secondary battery as an energy source. use.

4‧‧‧Isolation film

5‧‧‧ positive plate

6‧‧‧Negative plate

20‧‧‧Zigzag bending means

21‧‧‧ Guide rod

32‧‧‧ Plate transport tray

38‧‧‧ Pressing members

40‧‧‧Roll member

41‧‧‧ hanging roller

42,43,44‧‧‧Support roller

45,46‧‧‧buffer roller

47‧‧‧Air blowing means

48‧‧‧Rotary axis

49‧‧‧ movable roller

50‧‧‧ clamp

61‧‧‧Swing wheel

62,63‧‧‧Rollers

100‧‧‧ Stabilization means

22A, 22B‧‧‧

31A‧‧‧1st plate transport member

31B‧‧‧2nd plate transporting member

47A‧‧‧ upstream side

47B‧‧‧ downstream side

50A, 50B‧‧‧ jaw members

I‧‧‧ pole plate manufacturing means

II‧‧‧Isolation film supply means

Claims (16)

A method of manufacturing a secondary battery, comprising: zigzag-shaped in accordance with movement of the guiding member in a state in which a spacer is suspended between a guiding member of a plurality of rows disposed oppositely via a hanging roller a step of bending the spacer into a zigzag shape; inserting a positive electrode plate and a negative electrode plate alternately in each of the valleys of the spacer sheet bent into a zigzag shape, thereby forming the positive electrode plate and the negative electrode plate a step of alternately overlapping the spacers with the spacers; and pulling the guide members out of the valleys of the spacers, and pressing the laminates in a direction in which the positive plates and the negative plates are stacked And a step of manufacturing the electrode group; and before the step of hanging the spacer between the guiding members via the hanging roller, before the step of performing the zigzag bending by the movement of the guiding member, The spacer having a length that is pulled in when the zigzag is bent is retained in advance; in the zigzag bending step, on the upstream side of the zigzag bending means, when being pulled into the zigzag bending means Will be mentioned above The retained spacer is supplied to the zigzag bending means, and the position of the spacer is restricted on the downstream side of the zigzag bending means and the conveyance of the spacer is guided, and in the zigzag bending step, the sum is given The force of the travel of the spacer moving toward the zigzag bending means is relatively resistant. A method for manufacturing a secondary battery, comprising: an overlapping body in which one or two positive and negative electrode plates are sandwiched by two separators, and suspended by a hanging roller a step of bending the overlapping body into a zigzag shape by a zigzag bending means in a state of being opposed to the plurality of guiding members arranged in a plurality of rows; a step of inserting the other of the electrode plates in each of the valleys of the zigzag-shaped overlap, thereby forming a laminate in which the positive electrode plate and the negative electrode plate are alternately overlapped by the overlapping body; and further After the lead member is pulled out from each of the valleys of the stacked body, the laminated body is pressed in a direction in which the positive electrode plate and the negative electrode plate are stacked to form an electrode group; and the overlapping body is configured to pass through the hanging body The hanging roller is suspended from the state between the guiding members, and before the step of bending the zigzag by the movement of the guiding member, the spacer which is pulled in length when the zigzag is bent is retained in advance. In the zigzag bending step, on the upstream side of the zigzag bending means, when the zigzag bending means is pulled, the retained body is supplied to the zigzag bending means, and The aforementioned zigzag bend The downstream side of the folding means restricts the position of the overlapping body and guides the conveyance of the overlapping body, and in the zigzag bending step, the force against the movement of the overlapping body moving toward the zigzag bending means is given. The method for producing a secondary battery according to claim 1 or 2, wherein the spacer or the overlapping body is imparted with the spacer or the overlapping body by blowing air to the spacer or the overlapping body. Relative resistance. A method of manufacturing a secondary battery according to claim 3, wherein The air is ejected obliquely downward toward the spacer or the stack. The method for manufacturing a secondary battery according to any one of claims 1 to 4, wherein in the guiding of the transport of the spacer or the overlapping body, the isolation is surrounded by means of guiding conveyance Pieces or overlapping bodies. A manufacturing apparatus for a secondary battery, comprising: a zigzag bending means having a plurality of guiding members arranged in a zigzag shape in a vertical direction, and interlacing the guiding members in a horizontal direction between rows; The separator which is suspended between the row and the other row of the guiding member via the hanging roller is bent into a zigzag shape; and the electrode plate inserting means respectively are provided with a positive electrode plate for holding a predetermined number of positive electrode plates a plate transport member for use, and an electrode transport member for placing a negative electrode plate of a predetermined number of negative electrode plates, and moving the electrode plate transporting member for the positive electrode plate and the negative electrode plate to each of the spacers In the valley, the positive electrode plate and the negative electrode plate are alternately inserted into each of the valleys; and the separator supply means is supplied to the separator which is held by the spacer holding portion and pulled out via the hanging roller. To the zigzag bending means, the spacer having a length that is pulled in when the zigzag is bent is retained in advance, and the retained spacer is bent toward the zigzag when the zigzag is bent. And a stabilizing means for restricting the position of the spacer and guiding the transport of the spacer when the zigzag bending means is pulled in the aforementioned zigzag bending step, and bending the zigzag in the foregoing In the step, The force against the travel of the spacer moving toward the zigzag bending means is relatively resistant. A manufacturing apparatus for a secondary battery, comprising: a zigzag bending means having a plurality of guiding members arranged in a zigzag shape in a vertical direction, and interlacing the guiding members in a horizontal direction between rows; And the overlapping body which is suspended between the one row and the other row of the guiding member by the hanging roller and sandwiches one of the positive and negative electrode plates by the two separators is bent into a zigzag shape; the plate insertion means Providing another one of the electrode plates for placing the predetermined number of the electrode plates, and moving the plate transporting member into each of the valleys of the stacked body, and the other plate Inserted into each of the valleys; the superimposed body supply means supplies the overlapping body held by the overlapping body holding portion and pulled out via the hanging roller to the zigzag bending means, and preliminarily bends the zigzag When folded, the overlapped body of the length that is pulled in is retained, and the retained overlapped body is supplied to the zigzag bending means when the zigzag is bent; and the stabilizing means is bent in the zigzag shape In the steps, when When the zigzag bending means is pulled in, the position of the overlapping body is restricted and the conveyance of the overlapping body is guided, and in the zigzag bending step, the movement of the overlapping body which is moved to the zigzag bending means is relatively resistant. force. The apparatus for manufacturing a secondary battery according to claim 6 or 7, wherein the stabilizing means has an air blowing to the spacer Or the function of overlapping bodies. The apparatus for manufacturing a secondary battery according to claim 8, wherein the stabilizing means ejects the air obliquely downward toward the separator or the stack. The apparatus for manufacturing a secondary battery according to any one of claims 6 to 9, wherein the stabilizing means has a movable portion, and in the guiding of the transport of the spacer or the overlapping body, The spacer or the stacked body is surrounded by the constituent elements of the stabilizing means including the aforementioned portion by moving the portion. The apparatus for manufacturing a secondary battery according to claim 10, wherein the stabilizing means has the following constituent elements: a side edge of the spacer or the stack hanging from the hanging roller a plate-shaped flat plate portion disposed in the hanging direction; the end portion of the spacer or the overlapping body abutting on the inner peripheral surface to restrict the position of the spacer or the overlapping body in the width direction The spacer side or the overlapping body side extends two guiding members in a moving direction of the spacer or the overlapping body; and is disposed on the opposite side of the flat plate portion with respect to the spacer or the overlapping body, and is formed to face the foregoing The flat plate portion moves, and together with the flat plate portion and the two guide members, the portion where the spacer or the overlapping body passes through a space having a rectangular cross-sectional shape is formed. The apparatus for manufacturing a secondary battery according to claim 11, wherein the portion has a movement amount when moving toward the flat plate portion In the first and second movement modes, the first movement mode forms a space in which the lateral cross-sectional shape of the spacer or the superimposed body is rectangular, together with the flat plate portion and the two guide members. And when the zigzag bending step by the zigzag bending means is completed, the second movement mode is further moved toward the flat plate portion, and the spacer or the overlapping body is sandwiched between the spacer and the flat plate. Clamp between the departments. The apparatus for manufacturing a secondary battery according to claim 6 or 7, wherein the stabilizing means has a hanging direction along a side of the spacer or the stack hanging from the hanging roller. a plate-shaped flat plate portion disposed on the opposite side of the flat plate portion with respect to the spacer or the overlapping body, and formed as a flat moving member movable toward the flat plate portion; and formed at a base end The fixing portion is fixed to the flat plate portion or the moving member, and extends upward in a hanging direction of the spacer or the overlapping body, and elastically abuts the front end portion to the pressing member of the spacer or the overlapping body. The apparatus for manufacturing a secondary battery according to claim 6 or 7, wherein the stabilizing means has: a position restricting roller which is spaced apart from the spacer or overlaps along a hanging direction of the spacer or the overlapping body a plurality of one side of the body; and a pressing roller attached to the other side of the spacer or the overlapping body It is disposed between the two position regulating rollers, and is formed to be movable toward the surface of the other side of the spacer or the overlapping body. The apparatus for manufacturing a secondary battery according to any one of claims 6 to 14, wherein the spacer supply means or the overlapping body supply means is provided in a direction in which the spacer or the stack is transported. The upstream side and the downstream side of the support support at least two support rollers on the upstream side of the upstream side of the hanging roller; and a surface disposed between the support rollers and disposed to abut against one of the spacers or the overlapping body And at least one upstream buffer roller that can be moved up and down in a vertical direction; and the spacer or the superimposed body is supplied to the zigzag bending means side via the hanging roller, and the upstream side of the hanging roller is formed a reserved length portion of the spacer or the overlap body that is pulled in when the zigzag is bent, and the upstream side buffer roller is located at a predetermined rising position or lowered in a state of abutting against the spacer or the overlap body. In the state of the position, the spacer or the overlapping body is suspended between the guiding members via the hanging roller, and is zigzag formed by the movement of the guiding member. When off, so that the upstream buffer roller down or up. The apparatus for manufacturing a secondary battery according to any one of claims 6 to 15, further comprising: a buffer portion producing means for holding the downstream side of the stabilizing means a clamp of a front end portion of the spacer or the overlap body, and a downstream side of the stabilization means for abutting against the spacer or the downstream side buffer roller and the position restricting roller of the overlap body, The aforementioned spacer Or the downstream side of the overlap body is formed with a reserved length portion of the spacer or the overlap which is pulled in when the zigzag is bent.