JP2016103450A - Battery electrode plate manufacturing device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery electrode plate manufacturing device and a battery electrode plate method which make possible to weld a sheet-like battery separator in a more stable condition.SOLUTION: A battery electrode plate manufacturing device is arranged for manufacturing a battery electrode plate covered by separators 11 and 12 disposed on both faces of a positive electrode plate 10, by welding the separators 11 and 12 disposed on both faces of a positive electrode plate 10 at a welding position in a longitudinal direction and a welding position in a short-length direction crossing the longitudinal direction in a place where the separators 11 and 12 are opposed to each other. The battery electrode plate manufacturing device comprises: a preparatory shaping part for pressing at least one of the separators 11 and 12 disposed on both the faces of the positive electrode plate 10 at the short-length direction's welding position toward the other separator 11 or 12; and a welding part for forcing the one separator to abut against the other at the longitudinal direction's welding position and welding the separators 11 and 12 disposed on both the faces of the positive electrode plate 10 with the preparatory shaping part pressing the separator at the short-length direction's welding position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for manufacturing a battery electrode plate used in a battery such as a secondary battery, and a method for manufacturing a battery electrode plate.

  As is well known, secondary batteries such as nickel hydride secondary batteries are used as power sources for portable electronic devices and as power sources for electric vehicles and hybrid vehicles. For example, a nickel metal hydride secondary battery has an electrode plate group in which a plurality of positive electrode plates mainly composed of nickel hydroxide and negative electrode plates mainly composed of a hydrogen storage alloy are laminated via a separator, such as potassium hydroxide. It is a secondary battery comprised by being accommodated in a storage container with the alkaline electrolyte which consists of these. Conventionally, as one of the techniques for manufacturing the above-described electrode plate group, Patent Document 1 describes a technique of mounting a bag-like separator on one of the positive electrode plate and the negative electrode plate.

  The device described in Patent Document 1 is a device for mounting a bag-like separator on an electrode plate. In this device, a sheet-like separator is disposed so as to cover both surfaces of the electrode plate, and a separator around the electrode plate is provided. Are heat-welded by applying a hot plate having a width corresponding to the joining width along the side to be joined. Further, in this apparatus, the separator is cut by pressing a cutting hot plate on the substantially central part of the joining width of the separator. Thereby, a bag-shaped separator can be attached to the electrode plate.

JP 2002-260625 A

  By the way, since a separator usually consists of a sheet-like member which can be welded, such as a non-woven fabric of alkali-resistant resin, it can be welded or cut as described above. However, in recent years, it has been desired to develop a manufacturing technique that can suppress the occurrence of defects such as peeling at the welded portion of the separator and further stabilize the welded portion.

  The present invention has been made in view of such circumstances, and its object is to provide an apparatus for manufacturing a battery electrode plate capable of welding a sheet-shaped battery separator in a more stable state, and for a battery. It is in providing the manufacturing method of an electrode plate.

  An apparatus for manufacturing an electrode plate for a battery that solves the above-described problems is a first welding position extending in a first direction at a position where the separators are arranged on both sides of the electrode plate in the first direction and the first direction. A battery electrode plate manufacturing apparatus for manufacturing electrode plates covered with separators disposed on both surfaces of the electrode plate by welding a second welding position extending in the intersecting second direction, A preforming part that presses at least one of the separators arranged on both surfaces of the electrode plate in the second welding position in the direction of the other separator, and the preforming part presses the second welding position. A gist is provided with a welded portion that is welded by bringing the separators disposed on both surfaces of the electrode plate into contact with each other at the first welded position.

  A method for manufacturing a battery electrode plate that solves the above-described problem is that a separator disposed on both surfaces of an electrode plate has a first welding position extending in a first direction at a position where the separators face each other in the first direction. A method of manufacturing an electrode plate covered with separators disposed on both surfaces of the electrode plate as a battery electrode plate by welding a second welding position extending in a second direction that intersects each other. A step of pressing at least one of the separators arranged on both surfaces of the electrode plate at the second welding position in the direction of the other separator by the molding unit; and the preforming unit presses the second welding position. And a step of bringing the separators arranged on both surfaces of the electrode plate into contact with each other at the first welding position and welding them by the welding portion.

  According to such a configuration or method, when two intersecting welding positions are welded, a second welding position to be welded later is previously formed into a shape close to the shape when the welding position is welded. The first welding position to be welded first is welded. As a result, since the separator is preformed when the second welding position is later welded, the amount to be molded so as to push in the portion corresponding to the thickness of the electrode plate is reduced as compared with the case where there is no preforming. By the welding at the first welding position, a force such as a tension due to the restraint applied from the separator whose length in the first direction is restrained is reduced. Since the tension caused by the restraint is reduced in this way, the tension applied to the second welding position is reduced or equalized when the second welding position is subsequently welded. And the stability of welding in the second welding position is improved.

As a preferred configuration, the separators disposed on both surfaces of the electrode plate are applied with tension along the direction in which the first welding position extends.
According to such a configuration, the tension applied to the separator is also applied to the second welding position, but the tension is reduced by performing the preforming and welding the first welding position. Become.

As a preferred configuration, the separator is unwound from a supply reel, and the direction in which the tension is applied is a direction in which the separator is unwound from the supply reel.
According to such a configuration, tension is normally applied in the supply direction to the separator wound from the supply reel, and even the separator supplied in this way can be appropriately welded with the electrode plate interposed therebetween. It becomes like this. For example, by performing the preforming and the welding at the first welding position before the welding at the second welding position, such an effect can be obtained more significantly.

  As a preferred configuration, the first welding position is provided with a predetermined welding width at a central portion in a width direction orthogonal to a direction in which a tension is applied to the separator, the electrode plate has a rectangular shape, The opposite side of the side adjacent to the welding position of 1 protrudes from the separator.

  According to such a structure, the part etc. which are made into a lead from one side of a separator can be protruded, arrange | positioning an electrode plate in the bag formed with the separator. Thereby, the battery electrode plate for secondary batteries which has a separator with high stability of welding can be provided.

As a preferred configuration, the electrode plate has a thickness of a side adjacent to the first welding position smaller than a thickness of a side adjacent to the second welding position.
According to such a configuration, when the two separators sandwiching the electrode plate are pressed and brought closer, the tension of the second welding position is likely to be higher than the tension of the first welding position. Also, the preforming reduces the tension applied to the second welding position when welding the second welding position. Thereby, it can weld reliably even if it is the 2nd welding position where tension is easy to apply.

As a preferred configuration, the preforming portion abuts separators disposed on both surfaces of the electrode plate at the second welding position.
According to such a structure, when the separator arrange | positioned on both surfaces of an electrode plate is preformed, it can shape | mold to the shape close | similar to the shape to weld by the 2nd welding position. Further, when the first welding position is welded, there is a possibility that a force due to the deformation of the first welding position is applied to the second welding position, but the preformed shape can be suitably maintained. It becomes like this.

  As a preferred configuration, the preforming portion applies heat at a temperature lower than heat applied to the separator at the first welding position to the separator at the second welding position.

  According to such a configuration, by preliminarily welding the second welding position by preforming, the preformed shape of the second welding position is suitably maintained when the first welding position is welded. Can be made.

  As a preferred configuration, when the welded portion that welds the first welding position is the first welded portion, the second welded portion that welds the second welding position after the first welding position is welded. And a cutting part for cutting the first welding position and the second welding position welded by the first welding part and the second welding part at the respective longitudinal center parts.

  According to such a configuration, after the first welding position is welded, the preformed second welding position is appropriately welded by the second welding portion. Moreover, the battery electrode plate accommodated in the separator is obtained by cutting the first welding position and the second welding position at the central portion in the length direction.

  According to the battery electrode plate manufacturing apparatus and the battery electrode plate manufacturing method, the sheet-shaped battery separator can be welded in a more stable state.

The block diagram which shows the schematic structure about one Embodiment which actualized the manufacturing apparatus of the electrode plate for batteries. The flowchart which shows the procedure of the process of manufacturing the electrode plate for batteries in the same embodiment. It is a figure which shows the aspect of the positive electrode plate in each process which manufactures the electrode plate for batteries in the embodiment, Comprising: (a) is a figure which shows the state by which the separator is arrange | positioned on both surfaces of a positive electrode plate, (b) is 2nd. The figure which shows the state which the 1st welding position was welded while the welding position of this was preformed, (c) is a figure which shows the state where the 2nd welding position was welded, (d) is the 1st and 2nd The figure which shows the state divided | segmented in the welding position of. In the embodiment, it is a schematic diagram schematically showing a schematic configuration of the preformed first welded portion, (a) is a diagram showing a structure in the longitudinal direction of the separator, (b) is a short direction of the separator FIG. In the same embodiment, it is a schematic diagram which shows the outline | summary of operation | movement of a preforming and a 1st welding part, Comprising: (a) shows the state by which a 1st welding position is arrange | positioned at a preforming and 1st welding part. FIG. 4B is a diagram showing a state where a second welding position (preliminary molding position) is preformed, and FIG. 5C is a diagram showing a state where the first welding position is welded. The schematic diagram which shows typically the aspect of a positive electrode plate about other embodiment which actualized the manufacturing apparatus of the electrode plate for batteries. In the same embodiment, it is the schematic diagram which shows typically the aspect of the edge side of the positive electrode plate, (a) is the figure which shows the end surface structure of the short direction of the 2nd welding position and the positive electrode plate, (b) FIG. 3 is a diagram showing an end face structure in a longitudinal direction between a first welding position and a positive electrode plate.

  With reference to FIGS. 1-5, one Embodiment which actualized the manufacturing apparatus of the electrode plate for batteries, and the manufacturing method of the electrode plate for batteries is described. In this embodiment, the case where the positive electrode plate of a nickel hydride secondary battery is manufactured as a battery electrode plate is illustrated. This nickel metal hydride secondary battery is a sealed battery and is a battery used as a power source for electric vehicles and hybrid vehicles.

The nickel-metal hydride secondary battery is composed of a predetermined number of negative electrode plates (not shown) containing a hydrogen storage alloy and a predetermined number of positive electrode plates 10 containing nickel hydroxide (Ni (OH) ₂ ), which are made of an alkali-resistant resin nonwoven fabric. The electrode group laminated via the separators 11 and 12 is provided. The battery electrode plate 13 accommodates the positive electrode plate 10 so as to be wrapped in the first and second separators 11 and 12 that form a bag shape except for the lead portion 101 connected to the current collector plate. Even if the active material with which the foaming nickel board | substrate of the positive electrode plate 10 fell | separated and fell | separated, the separators 11 and 12 which comprise a bag shape can make the micro piece remain in a bag.

With reference to FIG. 1, the manufacturing apparatus and method of a battery electrode plate will be described.
An apparatus for manufacturing a battery electrode plate includes a conveyance unit (not shown) that conveys a rectangular positive electrode plate 10 divided from a large plate into a single plate size, and a sheet-like electrode disposed on the upper surface of the positive electrode plate 10. A first supply reel 21 for winding the first separator 11 and a second supply reel 22 for winding the sheet-like second separator 12 disposed on the lower surface of the positive electrode plate 10 are provided. Then, the battery electrode plate manufacturing apparatus sequentially forms the positive electrode plate 10 and the first and second separators 11 and 12 supplied to the separator arrangement process position 2a in the preforming / longitudinal welding process position 2b and short. It is moved to the welding process position 2c and the cutting process position 2d so as to be subjected to required processing and the like. As a result, the battery electrode plate 13 in which the positive electrode plate 10 is accommodated in the bag-shaped separator formed from the first and second separators 11 and 12 is produced. In FIG. 1, the longitudinal direction as the first direction is the left-right direction with respect to the paper surface, and the short direction as the second direction is a direction perpendicular to the longitudinal direction and penetrating the paper surface.

  As shown in FIG. 2, in the separator arrangement process position 2a, a separator arrangement process for arranging both separators 11 and 12 on both surfaces of the positive electrode plate 10 is performed (step S10). Further, at the preliminary molding / longitudinal welding process position 2b, a preliminary molding process (step S11) for preforming the first separator 11, and a longitudinal welding process (step S12) for welding both separators 11 and 12 in the longitudinal direction. Is done. Furthermore, a short welding process (step S13) for welding both separators 11 and 12 in the short direction is performed at the short welding process position 2c, and a plurality of battery electrode plates connected to each other at the cutting process position 2d. A cutting step (step S14) for cutting out each of 13 is performed.

  As shown in FIG. 1, two placement portions 23 and 24 made of guide rolls are provided at the separator placement process position 2 a so as to sandwich the positive electrode plate 10. Further, at the separator arrangement process position 2 a, the positive electrode 10, the first separator 11 wound from the first supply reel 21 with a predetermined tension, and the second supply reel 22 with a predetermined tension are wound. The second separator 12 is supplied. The placement unit 23 places the first separator 11 on the upper surface of the positive electrode plate 10, and the placement unit 24 places the second separator 12 on the lower surface of the positive electrode plate 10 (separator placement step). Then, the positive electrode plate 10 and both separators 11 and 12 are moved to the preforming / longitudinal welding process position 2b. Further, the first and second separators 11 and 12 are configured such that no slack or the like occurs between the supply reels 21 and 22 and the corresponding arrangement portions 23 and 24 due to the predetermined tension described above. Further, such tension is transmitted to the pre-molding / longitudinal welding process position 2b, the short welding process position 2c, and the like through the separators 11 and 12 extending in a strip shape in the longitudinal direction.

  Referring also to FIG. 3A, at the separator placement process position 2a, the positive electrode plate 10 is placed between the separators 11 and 12 so that the long side is along the longitudinal direction, and the short side is short. Arranged along the direction. In FIG. 3, the left-right direction on the paper surface is the longitudinal direction, and the up-down direction on the paper surface is the short direction. The two positive electrode plates 10 adjacent to each other in the short direction are arranged so that the lead portions 101 which are opposite sides of the long sides facing each other protrude outward from the short side end portions of the separators 11 and 12, respectively. In addition, an interval required for welding is secured between the long sides facing each other.

  Further, as shown in FIG. 1, at the pre-formation / longitudinal welding process position 2b, pre-formation / first welding in which both separators 11 and 12 are pre-formed in the short direction and then welded in the longitudinal direction. A part 31 is provided.

  Referring also to FIG. 3B, at the pre-forming / longitudinal welding process position 2b, the periphery of each of the four positive plates 10 is pre-formed or welded. The four positive plates 10 are arranged two in the longitudinal direction and two in the lateral direction, and a predetermined interval required for welding is secured between the positive plates 10 adjacent to each other in the longitudinal direction. ing. The preforming / first welding portion 31 preforms preforming positions 52 and 53 in the short direction provided in a space between two positive electrode plates 10 adjacent in the longitudinal direction (preliminary molding step). Further, the preforming / first welding portion 31 welds the longitudinal welding position 51 as the first welding position in the longitudinal direction provided in the interval between the two positive electrode plates 10 adjacent in the lateral direction (longitudinal direction). Welding process). Longitudinal welding position 51 is set at the center in the short direction, and is longer than the two positive plates 10 adjacent to each other in the longitudinal direction, and is welded with a predetermined welding width in the short direction. In addition, the short welding position 54a on the cutting process position 2d side (the right side in the drawing) is a portion welded in the short welding process one time before.

As shown in FIG. 1, a second welding portion 32 that welds both separators 11 and 12 in the short direction is provided at the short welding step position 2 c.
Referring also to FIG. 3 (c), in the short welding process position 2c, the second position provided over the entire width of the separators 11 and 12 in the short direction including the preformed preforming positions 52 and 53 is provided. The short welding positions 54 and 55 as welding positions are welded (short welding process). The short welding positions 54 and 55 are welded with a length equal to or greater than the full width of the separators 11 and 12 in the short direction and with a predetermined welding width in the long direction. Thereby, the four positive electrode plates 10 are surrounded by the long welding position 51 and the short welding positions 54 and 55 where the three sides are welded.

As shown in FIG. 1, the cutting process position 2d is provided with a cutting part 33 for cutting each welding position in the respective length direction.
Referring also to FIG. 3 (d), at the cutting process position 2d, the welded longitudinal weld position 51 and the short weld positions 54 and 55 respectively have the center position of the weld width along the length direction. It is cut (cutting process). As a result, the first and second separators 11 and 12 are partitioned by the long welding end 51h having a half width of the welding width and the two short welding ends 54h and 55h having the same half width. The positive electrode plate 10 is accommodated in a form sandwiched between the separators 11 and 12. Here, the welding width at the longitudinal welding position 51 and the welding width at the short welding position 54 are the same, but the respective welding widths may be different.

  Note that the preforming / first welding part 31, the second welding part 32, and the cutting part 33 are electrically connected to the control part 34, and their operations are controlled so as to operate in cooperation with each other. Controlled by the unit 34.

Then, with reference to FIG.4 and FIG.5, a preforming process and a longitudinal welding process are demonstrated in detail.
As shown in FIG. 4A, the preforming / first welding portion 31 is disposed at a position facing the first separator 11. The preforming / first welding section 31 includes a longitudinal welding section 40 as a first welding section for welding the longitudinal welding position 51, and preforming sections 41 and 42 for preforming the preforming positions 52 and 53, respectively. Is provided. The longitudinal welding portion 40 has a length longer than both ends of the two positive electrode plates 10 adjacent to each other in the longitudinal direction and a predetermined welding width, so that the longitudinal welding position 51 can be welded with the length and the predetermined welding width. It has become. Further, the longitudinal welded portion 40 is configured to be capable of moving forward and backward in the direction of the first separator 11.

  As shown in FIG. 4 (b), each preformed portion 41, 42 is configured as a pair of members sandwiching the longitudinal weld portion 40, and the length of each member is shorter than the short side of the positive electrode plate 10. In addition, the preforming positions 52 and 53 can be preformed along the short side of the positive electrode plate 10. Further, the preforming portions 41 and 42 are configured to be capable of moving forward and backward in the direction of the first separator 11.

  With reference to FIG. 5, operation | movement of the preforming and the 1st welding part 31 is demonstrated. FIG. 5 is a schematic view schematically showing a cross-sectional view taken along line 5-5 of FIG. Since each preforming part 41 and 42 perform the same operation | movement, here, for convenience of explanation, operation | movement of the preforming part 41 is demonstrated here and description of operation | movement of the preforming part 42 is omitted.

As shown to Fig.5 (a), both the separators 11 and 12 and the positive electrode plate 10 pinched | interposed between them are arrange | positioned in the pre-forming / longitudinal welding process position 2b.
Subsequently, as shown in FIG. 5B, the preforming / first welding portion 31 moves the preforming portion 41 forward in the direction of the first separator 11. Then, the preforming unit 41 contacts the first separator 11 at the preforming position 52 and presses the first separator 11 so that the first separator 11 becomes the second separator 12. Move to the position where it touches. The preforming unit 41 contacts the second separator 12 with a predetermined pressing force by contacting a conveying device (not shown) that supports the second separator 12. At this time, since the preforming part 41 presses the first separator 11 to a depth corresponding to the thickness of the positive electrode plate 10, the first separator 11 is extended in the longitudinal direction according to the pressed depth. . At this time, since the first separator 11 does not have a portion that restricts its movement, the entire longitudinal direction is stretched substantially evenly, and the tension distribution in the longitudinal direction is also substantially uniform. In addition, the separators 11 and 12 are restrained from the preforming position 52 by the preforming portion 41, thereby reducing the influence of the tension received from the supply reels 21 and 22. This is an effect obtained more significantly by the preforming at the preforming position 52.

  Subsequently, as shown in FIG. 5C, the preforming / first welding portion 31 moves the longitudinal welding portion 40 in the direction of the first separator 11. The longitudinal welded portion 40 is in contact with the first separator 11 at the longitudinal weld position 51 and is moved to a position where the first separator 11 is pressed and brought into contact with the second separator 12. The longitudinal welded portion 40 is brought into contact with the second separator 12 with a predetermined pressing force by contacting a transport device (not shown) that supports the second separator 12, and a predetermined weld. Heat at temperature. At this time, the longitudinal welded portion 40 is shaped to push the first separator 11 to a depth corresponding to the thickness of the positive electrode plate 10, so that the first separator 11 extends in the short direction according to the pressed depth. Be stretched. Note that the first separator 11 has the pre-forming position 52 constrained by the pre-forming part 41, but the length of the long side of the positive electrode plate 10 is not constrained, so that the first separator 11 is short as much as it is stretched. The entire direction is stretched substantially evenly, and the distribution of tension in the lateral direction is also substantially uniform. Further, since the side end face of the first separator 11 is not constrained, it can be moved a little according to the strength of the extension, and this also reduces the tension applied in the short direction. Further, since both the separators 11 and 12 are constrained at the preforming position 52 by the preforming portion 41, the influence of the tension applied from the supply reels 21 and 22 is reduced. The longitudinal welded portion 40 is heated for a predetermined time at a predetermined welding temperature, then moved backward in a direction away from the separators 11 and 12, and returned to the original position. Thereby, both the separators 11 and 12 are welded by the longitudinal welding part 40 with the longitudinal welding position 51 having a predetermined length and a predetermined welding width. In addition, since the longitudinal welding position 51 is welded in a state where the influence of the tension applied to both separators 11 and 12 is reduced, the stability of the welding is maintained. This is an effect obtained more remarkably by performing the preliminary molding at the preliminary molding position 52 prior to the welding of the longitudinal weld portion 40.

  After the longitudinal welding position 51 is welded, the preforming / first welding part 31 moves the preforming part 41 backward in the direction away from the separators 11 and 12, and returns it to the original position. As a result, the separators 11 and 12 are welded at the longitudinal welding position 51 while the preforming position 52 is preformed.

  4A, when the longitudinal welding position 51 is welded, the preforming portion 41 is separated from the preforming position 52, and both the separators 11 and 12 and the positive electrode plate 10 are preformed. -Moved from the long welding process position 2b to the short welding process position 2c. At this time, the welded longitudinal welding position 51 that restricts deformation in the longitudinal direction is formed in a shape including a position that intersects the preforming position 52, and thus the longitudinal direction applied to the preforming position 52 The influence of the tension on the surface is reduced, and the preforming at the preforming position 52 is easily maintained. Therefore, both separators 11 and 12 are moved to the short welding process position 2c while maintaining the preforming at the preforming position 52.

Subsequently, the operation of the second welded portion 32 will be described.
As shown in FIG.1 and FIG.3, the 2nd welding part 32 welds the preforming position 52 preformed. The second welded portion 32 includes a short welded portion as a second welded portion (not shown) that welds a short welded position 54 provided including the preforming position 52. The short weld portion has a length equal to or longer than the width in the short direction of both separators 11 and 12 and a predetermined weld width.

  When the separators 11 and 12 to which the longitudinal welding position 51 is welded and the positive electrode plate 10 are arranged at the short welding process position 2c, the second welding part 32 is the same as the longitudinal welding part 40. The first separator 11 is brought into contact with the second separator 12 at the short welding position 54. Then, the second welding portion 32 makes contact with the second separator 12 with a predetermined pressing force by contacting a conveying device (not shown) that supports the second separator 12, and a predetermined amount. Heat at the welding temperature. At this time, since the second welded portion 32 is shaped to push the first separator 11 to a depth corresponding to the thickness of the positive electrode plate 10, the first separator 11 is moved in the longitudinal direction according to the pressed depth. Be stretched. However, since the short welding position 54 maintains the shape preformed by the preforming portion 41 (see FIG. 4A), the length stretched in the longitudinal direction can be shortened. The influence of the tension received from extending the separators 11 and 12 is reduced. The second welding part 32 is heated for a predetermined time at a predetermined welding temperature, then moved backward in a direction away from both separators 11 and 12, and returned to its original position. Thereby, both the separators 11 and 12 are welded with the short welding position 54 at a predetermined length and a predetermined welding width, and the short welding position 54 is applied in the longitudinal direction of the separators 11 and 12. Since the welding is performed in a state where the influence of the tension is reduced, the stability of the welding is maintained. This is an effect that is more prominent when the preforming at the preforming position 52 and the welding at the longitudinal welding position 51 are performed before the welding at the short welding position 54.

As described above, according to the battery electrode plate manufacturing apparatus and battery electrode plate manufacturing method of the present embodiment, the effects listed below can be obtained.
(1) When the intersecting longitudinal welding position 51 and the short welding positions 54 and 55 are welded, the short welding positions 54 and 55 to be welded later are preliminarily formed in a shape close to the shape when the welding positions are welded. After forming, the longitudinal welding position 51 to be welded first is welded. Thereby, when the short welding positions 54 and 55 are welded later, the first separator 11 is preformed. For this reason, compared with the case where there is no preforming, the amount to be molded so as to push in the portion corresponding to the thickness of the positive electrode plate 10 is reduced, and the length in the longitudinal direction is restricted by the welding at the previous longitudinal welding position 51. The force such as tension caused by the restraint applied from 11 is reduced. By reducing the tension caused by the restraint in this way, the tension applied to the short welding positions 54 and 55 later is reduced or uniformized when the short welding positions 54 and 55 are later welded. Therefore, the stability of welding at the long welding position 51 and the short welding positions 54 and 55 is improved.

  (2) Although the tension applied to the first and second separators 11 and 12 is also applied to the short welding positions 54 and 55, the preliminary welding is performed and the longitudinal welding position 51 is welded to thereby reduce the tension. It will be reduced.

  (3) Normally, tension is applied to the first and second separators 11 and 12 wound from the supply reels 21 and 22 in the supply direction. In that case, the positive electrode plate 10 can be sandwiched appropriately. For example, when the preforming at the preforming position 52 and the welding of the longitudinal welded portion 40 are performed before the welding at the short welding position 54, such an effect can be obtained more remarkably.

  (4) While arranging the positive electrode plate 10 in the bag formed of the separators 11 and 12, a portion to be a lead can be projected from one side of the separators 11 and 12. Thereby, the battery electrode plate for secondary batteries which has a separator with high stability of welding can be provided.

  (5) Even when the two separators sandwiching the positive electrode plate 10 are pressed and brought closer, even if the structure of the positive electrode plate 10 is such that the tension at the short welding positions 54 and 55 tends to be higher than the tension at the long welding position 51, Preliminary molding reduces the tension applied to the short welding positions 54 and 55 when welding the short welding positions 54 and 55. As a result, it is possible to reliably weld the short welding positions 54 and 55 where the tension is easily applied.

  (6) When the separators 11 and 12 arranged on both surfaces of the positive electrode plate 10 are preformed, the short welding positions 54 and 55 can be formed in a shape close to the shape to be welded. Further, when the longitudinal welding position 51 is welded, a force due to the deformation of the longitudinal welding position 51 may be applied to the short welding positions 54 and 55, but the preformed shape can be suitably maintained. It becomes like this.

  (7) After welding at the longitudinal welding position 51, the preformed short welding positions 54 and 55 are appropriately welded by the second welding portion. Moreover, the battery electrode plate 13 accommodated in the separators 11 and 12 is obtained by cutting the longitudinal welding position 51 and the short welding positions 54 and 55 at the center in the longitudinal direction.

(Other embodiments)
In addition, the said embodiment can also be implemented with the following aspects.
In the above configuration, as long as the separators 11 and 12 can be welded, welding by a hot plate, welding by vibration, or other welding methods may be used.

  In the above-described embodiment, the positive electrode plate 10 has been illustrated for the case where the four corners of the surface in contact with the separators 11 and 12 are substantially perpendicular. However, the present invention is not limited to this, and the positive electrode plate may be chamfered into a polygonal shape or a curved shape with a right angle or less at the four corners of the surface in contact with each separator.

  As shown in FIG. 6, by processing the corner of the positive electrode plate into a square of approximately 45 degrees, it is avoided that the portion of the separator to which strong tension is applied from the welding position contacts the corner of the positive electrode plate. . In addition, since the distance between the welding position and the positive electrode plate can be increased by being processed into two corners, and the length of the separator that is extended when both separators are brought into contact with each other can be shortened. The influence of the tension applied to the welding position can be reduced.

  In the above-described embodiment, the positive electrode plate 10 is illustrated with respect to the case where each side other than the lead portion 101 is cut substantially vertically with the thickness as the height. However, the present invention is not limited to this, and the positive electrode plate may be processed so that its long side is thin.

  As shown in FIG. 7A, which is an end view taken along line 7a-7a in FIGS. 6 and 6, the short side 103 of the positive electrode plate 10 remains cut from the large plate with its thickness as a height. There are many. Therefore, the preforming position 53 is preformed, whereby the tension applied in the longitudinal direction when the short welding position 55 is welded is reduced, and the stability when the short welding position 55 is welded is increased. .

  As shown in FIG. 7B, which is an end view taken along the line 7b-7b in FIGS. 6 and 6, the long side 102 of the positive electrode plate 10 is the opposite side of the lead portion 101, so that the compression of the lead portion 101 is performed. Along with the processing, the long side 102 may be subjected to a compression processing such as an edge press. By compressing the long side 102, when the longitudinal welding position 51 is welded, the tension applied in the short direction of the first separator 11 is further reduced, and the stability when the longitudinal welding position 51 is welded. Will increase.

  In the case of such a shape, the thickness of the short welding position 54 is larger than the thickness of the long welding position, and accordingly, the short welding position is larger. For this reason, in particular, the effect obtained by preforming the preforming positions 52 and 53 corresponding to the short welding position 54 becomes more effective, and the effect is obtained that the battery electrode plate 13 having high separator welding stability can be obtained. Is increased.

  In the above embodiment, the case where the preforming positions 52 and 53 and the short welding positions 54 and 55 are orthogonal to the longitudinal welding position 51 is illustrated. However, the present invention is not limited to this, and the preforming position and the short welding position may not be orthogonal to the longitudinal welding position. For example, the preforming position can be an arbitrary angle within a range included in the short welding position.

  In the above-described embodiment, the case where the preforming positions 52 and 53 are set in the range included in the short welding positions 54 and 55 and the short welding positions 54 and 55 are preformed is illustrated. However, as long as appropriate preforming can be performed, a part of the preforming position may not be included in the short welding position.

  In the above embodiment, the case where the welding positions are welded to four positive plates 10 at a time is illustrated. However, the present invention is not limited to this, and two, three, or five or more positive electrode plates can be used at a time if it is necessary to weld a longitudinal welding position and a short welding position around the positive electrode plate. You may make it weld a welding position. In addition, when making a lead part protrude from the side edge part of a separator, it is suitable that the positive electrode plate which welds a welding position is an even number sheet.

  In the above embodiment, the case where the first separator 11 and the second separator 12 are in contact with each other at the time of preforming is illustrated. However, the present invention is not limited to this, so long as the distance between both separators can be made smaller than the thickness of the positive electrode plate sandwiched between them, the first separator and the second separator may not be in contact with each other. Good. Even when not in contact, when the short welding position is welded, the long welding position is added while the shape of both separators is formed in a state close to the shape when the two are welded. Tension etc. will be reduced.

  In the above embodiment, the case where the first separator 11 is moved in the direction of the second separator 12 and contacted with the second separator 12 at the time of preforming or welding is illustrated. However, the present invention is not limited to this, and if the distance between the first separator and the second separator is shortened, the second separator may be moved in the direction of the first separator, or the first separator and the second separator Both of the two separators may be moved in the direction of the opposing separators.

  In the above embodiment, the case where each of the preformed portions 41 and 42 has a length shorter than the short side of the positive electrode plate 10 and a width narrower than a predetermined welding width is illustrated. However, the present invention is not limited thereto, and each preformed part may have a length that exceeds the side surface of the separator or a width that is greater than or equal to the welding width, as long as both separators are not welded.

  -In the above-mentioned embodiment, each preforming part 41 and 42 illustrated about the case where both separators 11 and 12 are made to contact. However, the present invention is not limited to this, and each preforming part may temporarily weld both separators. In addition, since it welds by a short weld part after welding, it is preferable that the temperature at the time of making it weld is a heat | fever of a temperature lower than the heat which a longitudinal weld part and a short weld part give to a separator. . By preliminarily welding the short welding position (preliminary molding position), when the long welding position is welded or when the short welding position is subsequently welded, the preformed shape of the short welding position is obtained. It can be suitably maintained.

  -In above-mentioned embodiment, the positive electrode plate 10 was a rectangle, and illustrated about the case where a long side is arrange | positioned along a longitudinal direction. However, the present invention is not limited to this, and the short side of the positive electrode plate may be disposed along the longitudinal direction. The positive electrode plate may be square.

  -In above-mentioned embodiment, it illustrated about the case where the battery electrode plate 13 of a nickel-hydrogen secondary battery is manufactured. However, the present invention is not limited thereto, and the battery electrode plate may be a lithium ion secondary battery, another secondary battery (storage battery) such as a nickel cadmium secondary battery, or a primary battery such as a manganese battery. Also good.

In the above embodiment, the case of manufacturing the battery electrode plate 13 wrapped in the separators 11 and 12 is illustrated, but the present invention is not limited thereto, and a negative electrode plate wrapped in the separator may be manufactured.
-In above-mentioned embodiment, it illustrated about the case where a nickel hydride secondary battery is mounted in a vehicle. Such vehicles include electric vehicles and hybrid vehicles, as well as gasoline vehicles and diesel vehicles equipped with batteries. Further, the nickel hydride secondary battery may be used as a moving body other than an automobile, a fixed power source, or a power source other than a motor as long as it is required as a power source. For example, power sources other than automobiles include moving bodies such as railways, ships, airplanes, and robots, and power supplies for electrical products such as information processing apparatuses.

  DESCRIPTION OF SYMBOLS 10 ... Positive electrode plate, 11 ... 1st separator, 12 ... 2nd separator, 13 ... Battery electrode plate, 21 ... 1st supply reel, 22 ... 2nd supply reel, 23 ... Arrangement | positioning part, 24 ... arrangement | positioning , 31 ... Preliminary molding / first welding part, 32 ... Second welding part, 33 ... Cutting part, 40 ... Longitudinal welding part, 41, 42 ... Preliminary molding part, 51 ... Longitudinal welding position, 51h ... Longitudinal welding End, 52, 53 ... Preliminary molding position, 54 ... Short welding position, 54a ... Short welding position, 54h ... Short welding end, 55 ... Short welding position, 55h ... Short welding end, 101 ... Lead part, 102 ... long side, 103 ... short side.

Claims (9)

A first welding position extending in a first direction at a position where the separators face each other, and a second welding position extending in a second direction intersecting the first direction. A battery electrode plate manufacturing apparatus for manufacturing electrode plates covered with separators disposed on both sides of the electrode plate by welding each of
A preforming portion that presses at least one of the separators arranged on both surfaces of the electrode plate in the second welding position in the direction of the other separator;
A welding part for contacting the separators disposed on both surfaces of the electrode plate at the first welding position while the preforming part is pressing the second welding position. An apparatus for manufacturing a battery electrode plate. The battery electrode plate manufacturing apparatus according to claim 1, wherein tension is applied to separators disposed on both surfaces of the electrode plate along a direction in which the first welding position extends. The battery electrode plate manufacturing apparatus according to claim 2, wherein the separator is wound from a supply reel, and a direction in which the tension is applied is a direction in which the separator is wound from the supply reel. The first welding position is provided with a predetermined welding width at a central portion in a width direction orthogonal to a direction in which a tension is applied to the separator, and the electrode plate has a rectangular shape, and the first welding position The manufacturing apparatus of the battery electrode plate according to claim 2, wherein a side opposite to the side protrudes from the separator. 5. The battery electrode according to claim 2, wherein the electrode plate has a thickness of a side adjacent to the first welding position smaller than a thickness of a side adjacent to the second welding position. Board manufacturing equipment. The apparatus for manufacturing an electrode plate for a battery according to any one of claims 1 to 5, wherein the preforming portion contacts separators disposed on both surfaces of the electrode plate at the second welding position. 7. The battery according to claim 6, wherein the preforming portion applies heat at a temperature lower than heat applied to the separator at the first welding position by the welded portion to the separator at the second welding position. Production equipment for electrode plates. A second welded portion that welds the second welded position after the first welded position is welded when the welded portion that welds the first welded position is the first welded part;
The cutting | disconnection part which cut | disconnects the 1st welding position and 2nd welding position which were welded by these 1st welding parts and the 2nd welding part in each longitudinal direction center part of Claim 1-7 The manufacturing apparatus of the electrode plate for batteries as described in any one. A first welding position extending in a first direction at a position where the separators face each other, and a second welding position extending in a second direction intersecting the first direction. Each of the electrode plates is a method of manufacturing a plate covered with separators disposed on both sides of the plate as a battery plate,
A step of pressing at least one of the separators arranged on both surfaces of the electrode plate in the second welding position in the direction of the other separator by the preforming portion;
In the state where the preforming part is pressing the second welding position, the step of welding the separators disposed on both surfaces of the electrode plate at the first welding position by the welding part. A method for producing an electrode plate for a battery, comprising:

Images