JP2019040873A - Method for forming strap for lead storage battery - Google Patents

Abstract

To provide a method for forming a strap for a lead storage battery, with which occurrence of welding defects can be prevented when the strap for a lead storage battery is formed using a plasma welding device.SOLUTION: As shown in a torch movement path 10, when a single tab 1 inserted in a slit is defined as the center and a welding direction of the single tab 1 is defined as a Y-direction, a torch of a plasma welding device is moved from a start point 10s in the Y-direction while being weaved in an X-direction. The torch is moved in the Y-direction from a point exceeding one end in the Y-direction of the single tab 1 to a point exceeding the other end in the Y-direction of the single tab while being weaved in the X-direction. This operation causes portions of the single tab 1, a base, and an added lead component to be fused, and this operation is performed on all of a plurality of tabs 1 so as to form a strap 9, so that occurrence of welding defects due to insufficient fusing can be prevented.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for forming a strap of a lead storage battery.

  In Japanese Patent No. 4622321 (Patent Document 1), a pole for joining a plurality of pole plates by melting a pole pole part, an ear part, and a lead part by injecting a plasma arc from a torch of a plasma welding apparatus. An example of the manufacturing method of the lead acid battery to form is disclosed. In this method, the number of times that the plasma arc is sprayed from the torch of the plasma welding apparatus to the molten lead reservoir is increased, and at the same time the pole is integrated with the strap.

Japanese Patent No. 4622321

  The method described in Patent Document 1 is an effective method when forming a strap. However, as the capacity of the lead-acid battery increases, not only does the shape of the strap increase, but the heat capacity of the pole pole also increases. For this reason, there is a problem that poor welding such as insufficient melting is likely to occur.

  The objective of this invention is providing the strap formation method of the lead storage battery which can prevent that a welding defect generate | occur | produces, when forming the strap of a lead storage battery using a plasma welding apparatus.

  In the lead storage battery strap forming method according to the first invention of the present application, first, an electrode plate group is prepared by laminating a plurality of electrode plates each having an ear portion through a separator. Next, a jig provided with a plurality of slits through which a plurality of ears respectively penetrates and a molten lead reservoir that entirely surrounds the plurality of slits, and a plurality of ears of the electrode plate group penetrate through the plurality of slits. It arrange | positions on an electrode group so that it may. Next, a pole lead component having a pole column at the base is disposed along the plurality of ear portions in the molten lead reservoir, and one or more additional lead components are disposed on the plurality of ear portions. Then, a plasma arc is injected from a plasma welding torch to a part of the base of the lead pole part and one or more lead parts, and the part of the base of the pole lead part is added to the lead part and the plurality of ears. Molten lead obtained by melting a part of the molten lead is accumulated in a molten lead reservoir portion to form a strap integrated with the pole column.

  In the present invention, when the direction in which the plurality of slits are arranged is defined as the X direction, the direction in which the pole columns extend is defined as the Z direction, and the direction perpendicular to the X direction and the Z direction is defined as the Y direction, And moving the torch in the Y direction while weaving in the X direction with the Y direction as the welding direction of one ear, adding a part of one ear, a part of the base, and a part of the lead component The strap is formed by performing a melting operation for melting the plurality of ear portions. In this specification, weaving means that the torch is swung in the X direction. As in the present invention, when the melting operation is performed while weaving the torch for each of the ears, the molten lead can be sequentially stored in the molten lead reservoir around one ear. As a result, it is possible to prevent the occurrence of poor welding due to insufficient melting and to form a strap having no poor welding.

  The weaving width of the weaving is preferably determined so as not to melt other adjacent ears. In this way, it is possible to prevent overmelting of the ear part. Further, the torch is moved in the Y direction while weaving in the X direction from the point beyond one end in the Y direction of one ear to the point beyond the other end in the Y direction of one ear. If it does in this way, a part of Y direction ear part, a part of base, and a part of lead component can be melted, and generation of poor welding can be prevented.

  After the melting operation for one ear portion is completed, the torch is moved to a position where the other adjacent one ear portion is the center of the weaving, and the other one ear portion and the base portion are moved. Add a melting operation to melt some of the lead parts. Since the weight of the torch is light, moving the torch makes the equipment for welding easier.

  Divide the molten lead reservoir part into two or more sections, prepare two or more torches, and perform the melting operation in two or more sections with two or more torches. Can be formed.

  The average thickness of the strap is a value in the range of 6 to 10 mm, the width of the strap is a value in the range of 25 to 30 mm, the weaving frequency is 3 ± 1 Hz, and the torch moves in the Y direction. It is preferable that the moving speed when the welding current is within a range of 60 to 190 cm / min and the welding current is a value within a range of 75A to 185A. In this case, the welding current is increased when the moving speed is increased, and the welding current is decreased when the moving speed is decreased.

  In the second invention of the present application, a plurality of electrode plates having ears are stacked via a separator to prepare an electrode plate group, and each of the plurality of ears includes a plurality of slits through which the plurality of slits are formed. A jig having a molten lead reservoir that surrounds the electrode plate group is arranged on the electrode plate group so that the plurality of ears of the electrode plate group penetrate the plurality of slits. In the molten lead reservoir, a pole lead component having a pole column is disposed on a base having a plurality of through holes through which a plurality of ear portions respectively penetrate, and a part of the plurality of ear portions and the pole lead component A molten lead obtained by injecting a plasma arc from a plasma welding torch onto a part of the base to melt a part of the plurality of ears and a part of the base of the lead pole lead component is used as a molten lead reservoir. To form a strap integrated with the pole. Each of the plurality of through holes has a shape that penetrates the base of the polar lead component in the Z direction and extends in the Y direction. By moving the torch in the Y direction while weaving in the X direction with the one ear inserted in the through hole as the center and the Y direction as the welding direction of one ear, a part of one ear A melting operation for melting a part of the base is performed on all of the plurality of ears to form a strap. Even when no additional lead parts are used as in the present invention, if the melting operation is performed while weaving the torch for each one ear part, the molten lead is sequentially put into the molten lead reservoir part around one ear part. You can accumulate. As a result, it is possible to prevent the occurrence of poor welding due to insufficient melting and to form a strap having no poor welding.

  The weaving width of the weaving is preferably determined so as not to melt other adjacent ears. In this way, excessive melting of the ear portion does not occur. Further, the torch is moved in the Y direction while weaving in the X direction from the point beyond one end in the Y direction of one ear to the point beyond the other end in the Y direction of one ear. If it does in this way, a part of Y direction ear part, a part of base, and a part of lead component can be melted, and generation of poor welding can be prevented.

  In addition, after the melting operation for one ear portion is completed, the torch is moved to a position where the other adjacent ear portion is the center of the weaving, and the other one ear portion and a part of the base are melted. It is preferable to carry out a melting operation.

  Divide the base of the pole pole lead component into two or more sections, prepare two or more torches, and perform melting operation in two or more sections with two or more torches, even if the strap becomes long, it is short A strap can be formed in time.

  In the second invention, the average thickness of the strap is a value in the range of 6 to 10 mm, the width dimension of the strap is a value in the range of 25 to 30 mm, the weaving frequency is 3 ± 1 Hz, and the torch is It is preferable that the moving speed when moving in the Y direction is a speed within the range of 60 to 190 cm / min, and the welding current is a value within the range of 75A to 185A. At this time, the welding current is increased when the moving speed is increased, and the welding current is decreased when the moving speed is decreased.

It is a top view which shows the movement path | route of the torch of the plasma welding apparatus in 1st and 2nd embodiment of the strap formation method of the lead acid battery of this invention. It is a perspective view which shows arrangement | positioning of each member before the strap formation method of 1st Embodiment is applied. It is a perspective view which shows arrangement | positioning of each member before the strap formation method of 2nd Embodiment is applied.

  Hereinafter, embodiments of a welding mask device according to the present invention will be described with reference to the drawings.

(First embodiment)
The lead storage battery to which the strap forming method of the lead storage battery according to the first embodiment of the present invention as shown in FIG. 1 is applied has an electrode plate group in which a plurality of electrode plates are stacked via separators in the battery case. It is stored together with the electrolyte. Each electrode plate is provided with lead ears, and current is collected by a strap connected to each ear, and charging / discharging is performed through a pole column provided on the strap.

  In the lead storage battery strap forming method of the first embodiment, during the process of manufacturing such a lead storage battery, an electrode plate group formed by laminating a plurality of electrode plates each having an ear portion via a separator is provided. After preparation, it is executed when the ears are connected to each other to form a strap.

  As shown in FIG. 2, a plurality (seven in the first embodiment) of ear parts 1 respectively provided on a plurality of electrode plates (not shown) respectively penetrate a plurality (the same number as the ear parts 1). 7) and a jig 4 having a molten lead reservoir 3 that surrounds the plurality of slits 2 as a whole, and a plurality of ears 1 of the electrode plate group respectively penetrate the plurality of slits 2. Then, it is arranged on the electrode plate group in such a manner that the ear portion 1 extends upward so as to protrude into the molten lead reservoir portion 3.

  Next, in the molten lead reservoir 3, a pole lead component 7 having a pole 6 on the base 5 is arranged along the plurality of ears 1, and the lead component 8 is added on the plurality of ears 1. Deploy. The additional lead component 8 has an E-shaped cross section in a direction orthogonal to the longitudinal direction. When the additional lead component 8 having such a cross-sectional shape is used, the molten lead easily goes around the ear portion 1. The shape of the additional lead component 8 is not limited. For example, the cross-sectional shape in the direction orthogonal to the longitudinal direction may be a U or U shape.

  Next, a part of the base 5 of the pole lead part 7 is added to the lead part 8 and a plasma arc is injected from the torch of the plasma welding apparatus to the lead part 8 to add a part of the base 5 of the pole lead part 7 to the lead part 8 and a plurality of lead parts 8. The molten lead obtained by melting a part of the ear portion 1 is accumulated in the molten lead reservoir 3 to form a strap 9 integrated with the pole column 6. The pole lead component 7, the lead component 8 and the ear 1 are all made of lead or a lead alloy.

  In each figure, when the direction in which the plurality of slits 2 are arranged is defined as the X direction, the direction in which the pole 6 extends is defined as the Z direction, and the direction perpendicular to the X direction and the Z direction is defined as the Y direction, By moving the torch for injecting the plasma arc downward with the Y direction as the welding direction of one ear 1 around the one ear 1 and moving in the Y direction while weaving in the X direction, one ear 1 The strap 9 is formed by performing a melting operation for melting a part of the base part 5 and a part of the base 5 and melting a part of the lead component 8 on all of the plurality of ears 1. Here, weaving means that the torch is swung in the X direction.

  The melting operation with this weaving will be described with reference to FIG. Although shown as a completed strap 9 in FIG. 1 for convenience of explanation, the strap 9 has not yet been formed before the melting operation is completed. Since the outline of the strap 9 substantially overlaps with the shape of the inner surface of the molten lead reservoir 3, which of the ears 1 is above the molten lead reservoir 3 surrounding each ear 1 passing through each slit 2. It represents whether the torch moves in such a positional relationship.

  In FIG. 1, the moving path 10 of the torch on the plane above the strap 9 is indicated by a one-dot chain line. The torch moving path 10 is shown from the start point 10s to the end point 10e, but until the start point 10s is reached and / or after the end point 10e is reached, the torch is moved to another path (for example, the base 5 and the lead component 8). It is also possible to perform the melting operation while moving to the boundary.

  The torch moving path 10 starts from the starting point 10 s near the lower end in the Y direction of the ear 1 at the right end of the X direction, while weaving the torch in the X direction as the welding direction of the ear 1, Move to the point beyond the Y direction. Thereby, a part of the ear | edge part 1 of the right end of Y direction, a part of the base 5, and a part of lead component 8 fuse | melt.

  The weaving width of the weaving in the first embodiment of FIG. 1 is determined to be substantially the same as the width of the ear 1 so as not to melt other adjacent ears 1. Thereby, generation | occurrence | production of the overmelting with respect to the ear | edge part 1 can be prevented. The weaving width that does not cause excessive melting is determined according to the size of the strap, the amount of lead to be melted, the moving speed of the torch, the welding current, the weaving period, and the like.

  In the first embodiment, the average thickness of the strap 9 is about 8 mm, the width dimension of the strap 9 is about 30 mm, and in order to sufficiently cover and melt the dimension in the Y direction of the ear portion 1 of about 15 mm, While the torch moves 20 mm (at a speed of 60 cm / min) in the Y direction from the starting point 10 s for 2 seconds, five cycles of weaving are performed, so the weaving frequency is 2.5 Hz. The welding current is set to 100A. Under these welding conditions, the melting operation is performed while weaving the torch for each of the ears, so that the molten lead can be sequentially stored in the molten lead reservoir around one ear. As a result, it was possible to prevent the occurrence of defective welding due to insufficient melting and to form a strap without defective welding. The presence or absence of defective melting was confirmed by an ultrasonic flaw detection test (nondestructive test). The optimum conditions are determined so that the welding current increases when the moving speed is increased or the weaving frequency is decreased, and conversely, the welding current is decreased when the moving speed is decreased or the weaving frequency is increased.

  After the melting operation for the ear 1 at the right end in the X direction is completed, as shown by the movement path 10 of the torch, the second point from the right end at the right end of the X direction from the point near the upper end in the Y direction of the ear 1 at the right end in the X direction. The torch is moved to a position that becomes the center of the weaving near the lower end in the Y direction of the adjacent ears 1. During this time, the torch may temporarily stop the plasma arc injection or increase the moving speed of the torch so that no excessive melting occurs. Subsequently, as shown in the movement path 10 of the torch, the torch is moved while weaving from near the lower end in the Y direction of the second ear 1 to near the upper end, and a part of the second ear 1 and the base are moved. A melting operation for melting a part of the lead component 8 by adding a part of 5 is performed. Since the weight of the torch is lighter than that of the electrode plate group, moving the torch rather than moving the electrode plate group simplifies the equipment for welding.

  When the melting operation with the weaving of the torch as described above is performed on each of the ears 1, the molten lead can be sequentially stored in the molten lead reservoir 3 around each ear 1. . When the torch finally reaches the end point 10e near the upper end in the Y direction of the ear 1 at the left end in the X direction, the strap is completed.

  As described above, according to the lead-acid battery strap forming method of the first embodiment, a welding failure due to insufficient melting occurs as a result of performing the melting operation while weaving the torch to each of the ears one by one. Thus, a strap free from poor welding can be formed.

  The strap forming method of the first embodiment can be applied to a wide range of lead storage batteries having different dimensions and capacities by adjusting the number of torches, the melting current and the moving speed. For example, the strap is long, If there are more than 20 ears to be melted, the molten lead reservoir is divided into two or more sections, and two or more torches are prepared. When the melting operation is performed on ten ears, a strap can be formed in a short time.

  By the way, the range in which good welding results can be obtained by carrying out strap welding by changing the average thickness, width dimension, weaving frequency, torch moving speed and welding current of the strap was confirmed. The table below shows the results. In the following welding results, “good” performed by the same method as the method for confirming poor melting under the conditions of the above example means that there was no defective melting. It was also confirmed that if the conditions in Table 1 below were not satisfied, the possibility of poor welding based on poor melting was increased. From the examples in which the following conditions are changed, when the average thickness of the strap is a value in the range of 6 to 10 mm and the width dimension of the strap is a value in the range of 25 to 30 mm, the weaving frequency is 3 ± 1 Hz. It is confirmed that the moving speed when the torch is moving in the Y direction is a speed in the range of 60 to 190 cm / min, and the welding current is preferably a value in the range of 75 A to 185 A. did it.

（第２の実施の形態）
図３は、本発明の第２の実施の形態の鉛蓄電池のストラップ形成方法が適用される前の各部材の配置を示す図２と同様の図であり、図２で示した部材と同様の機能を有する部材には同じ符号を付して示すとともに、その説明を省略する。

(Second Embodiment)
FIG. 3 is a view similar to FIG. 2 showing the arrangement of each member before the strap forming method for a lead storage battery according to the second embodiment of the present invention is applied, and is similar to the member shown in FIG. The members having a function are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 3, the same number (seven) and the same interval as the ear parts 1 are provided so that a plurality (seven) ear parts 1 penetrate the molten lead reservoir part 3. A pole lead component 11 having a pole 12 is disposed on a base 13 having a through hole 14 having a size in plan view that is slightly larger than the size in plan view. Then, when the melting operation with the torch weaving as shown in FIG. 1 is performed, even if no additional lead component is used, the melting is performed around one ear 1 as in the first embodiment. Molten lead can be sequentially stored in the lead reservoir 3. As a result, the occurrence of poor welding due to insufficient melting can be prevented, and a strap free from poor welding can be formed.

  Other operational effects and deformation / improvement are also the same as those in the first embodiment. Regarding the welding conditions, it was confirmed that preferable results were obtained under the same conditions as the welding conditions in Table 1 above.

  According to the strap forming method of the lead storage battery of the present invention, it is possible to prevent a welding failure from occurring when forming the strap of the lead storage battery using the plasma welding apparatus.

DESCRIPTION OF SYMBOLS 1 Ear | edge part 2 Slit 3 Molten lead pool part 4 Jig 5 Base 6 Polar pillar 7 Polar pillar lead part 8 Addition lead part 9 Strap 10 Torch moving path 11 Polar pillar lead part 12 Polar pillar 13 Base 14 Through-hole

Claims (6)

A plurality of electrode plates with ears are stacked via a separator to form an electrode plate group,
A jig provided with a plurality of slits through which a plurality of ears respectively penetrates and a molten lead reservoir part that entirely surrounds the plurality of slits, and the plurality of ear parts of the electrode plate group include the plurality of slits. Arranged on the electrode plate group to penetrate,
In the molten lead reservoir, a pole column lead component having a pole column on a base having a plurality of through holes through which the plurality of ears respectively penetrates is disposed.
A plasma arc is jetted from a plasma welding torch to a part of the plurality of ears and a part of the base of the pole lead component, and a part of the plurality of ears and the pole lead component A lead storage battery strap forming method for forming a strap integrated with the pole column by accumulating molten lead obtained by melting a part of the base in the molten lead reservoir,
When the direction in which the plurality of slits are arranged is defined as the X direction, the direction in which the polar column extends is defined as the Z direction, and the direction perpendicular to the X direction and the Z direction is defined as the Y direction.
Each of the plurality of through holes has a shape that penetrates the base of the pole lead component in the Z direction and extends in the Y direction,
A portion of the one ear portion is formed by weaving the torch in the X direction with the one ear portion inserted into the through hole as a center and the Y direction as a welding direction of the one ear portion. A melting operation for melting a part of the base is performed on all of the plurality of ears to form the strap,
The weaving width of the weaving is determined so as not to melt other adjacent ears,
Moving the torch in the Y direction while weaving in the X direction from a point beyond one end in the Y direction of the one ear to a point exceeding the other end in the Y direction of the one ear. A method for forming a strap for a lead-acid battery.   After the melting operation for one of the ears is finished, the torch is moved to a position where the other adjacent one of the ears becomes the center of the weaving, and the other one of the ears and the base The lead-acid battery strap forming method according to claim 1, wherein the melting operation of melting a part of the lead-acid battery is performed.   The base of the pole lead component is divided into two or more sections, two or more torches are prepared, and the melting operation is performed in each of the two or more sections with the two or more torches. 3. A method for forming a strap of a lead storage battery according to 2. A plurality of electrode plates with ears are stacked via a separator to form an electrode plate group,
A jig provided with a plurality of slits through which a plurality of ears respectively penetrates and a molten lead reservoir part that entirely surrounds the plurality of slits, and the plurality of ear parts of the electrode plate group include the plurality of slits. Arranged on the electrode plate group to penetrate,
In the molten lead reservoir, arrange a pole lead component having a pole column on the base along the plurality of ears, and place one or more additional lead components on the plurality of ears,
A plasma arc is sprayed from a plasma welding torch to a part of the base of the pole lead part and the one or more additional lead parts, and a part of the base of the pole lead part, the additional lead part, A lead forming battery strap forming method in which molten lead obtained by melting a part of the plurality of ears is stored in the molten lead reservoir, and a strap integrated with the pole column is formed,
When the direction in which the plurality of slits are arranged is defined as the X direction, the direction in which the polar column extends is defined as the Z direction, and the direction perpendicular to the X direction and the Z direction is defined as the Y direction.
By making the torch weave in the X direction with the one ear inserted in the slit as the center and the Y direction as the welding direction of the one ear, the part of the one ear and the A melting operation for melting a part of the base and a part of the lead component is performed on all of the plurality of ears to form the strap,
The weaving width of the weaving is determined so as not to melt other adjacent ears,
Moving the torch in the Y direction while weaving in the X direction from a point beyond one end in the Y direction of the one ear to a point exceeding the other end in the Y direction of the one ear. A method for forming a strap for a lead-acid battery.   After the melting operation for one of the ears is finished, the torch is moved to a position where the other adjacent one of the ears becomes the center of the weaving, and a part of the other one of the ears The lead storage battery strap forming method according to claim 4, wherein the melting operation of melting a part of the base and a part of the additional lead component is performed.   6. The molten lead reservoir is divided into two or more sections, two or more torches are prepared, and the melting operation is performed in each of the two or more sections with the two or more torches. Of forming a lead-acid battery strap.

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