TWI742194B - Method for forming lap joint of lead storage battery - Google Patents

Abstract

The present invention provides a method for forming a lap joint of a lead storage battery. When a plasma welding device is used to form the lap joint of a lead storage battery, the occurrence of poor welding can be prevented. As shown in the moving path 10 of the welding torch, center the one ear 1 inserted into the slit, and set the Y direction as the welding direction of one ear, so that the welding torch of the plasma welding device is at X 10s from the starting point. Swing in the direction while moving in the Y direction. The so-called swing refers to shaking the welding torch in the X direction. Thereby, each part of one ear 1, base and additional lead parts is melted, and this action is performed for all of the plurality of ears 1 to form a lap piece 9, thereby preventing welding caused by insufficient melting The occurrence of bad situations.

Description

Method for forming lap joint of lead storage battery

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

In Japanese Patent No. 4622321 (Patent Document 1), an example of a method for manufacturing a lead storage battery is disclosed. A plasma arc is sprayed from the welding gun of the plasma welding device to the pole parts, ears, and lead parts to melt them. , And connect the ears of a plurality of pole plates to form a lap piece. In this method, the number of times that the plasma arc is sprayed from the welding gun of the plasma welding device to the molten lead accumulation part is increased, and the terminal post and the bonding piece are integrated while forming the bonding piece.

[Prior Art Document] (Patent Document) Patent Document 1: Japanese Patent No. 4622321.

(Problems to be Solved by the Invention) The method described in Patent Document 1 is a very effective method when forming the lap piece. However, if the capacity of the lead storage battery increases, not only the shape of the strap will increase, but the heat capacity of the pole will also increase. Therefore, there is a problem that poor welding such as insufficient melting is likely to occur.

The purpose of the present invention is to provide a method for forming a lead-acid battery strap, which can prevent the occurrence of poor welding when the plasma welding device is used to form the lead-acid battery strap.

(Means for Solving the Problem) In the lead-acid battery strap forming method of the first invention of the present application, first, an electrode plate group formed by laminating a plurality of electrode plates with ears via a separator is prepared. Then, a jig provided with a plurality of slits through which the plurality of ears are respectively penetrated and a molten lead accumulation part which completely surrounds the plurality of slits is provided so that the plurality of ears of the electrode plate group penetrates the plurality of slits The method is configured on the plate group. Then, the post lead parts are arranged in the molten lead storage part along the plurality of ears, and one or more additional lead parts are arranged above the plurality of ears, wherein the post lead parts are provided with a pole at the base. Then, from the welding torch for plasma welding, a plasma arc is sprayed to a part of the base of the pole lead part and one or more additional lead parts, so that a part of the base of the pole lead part, the additional lead part, and a plurality of ear parts Part of the melting point is melted, and the molten lead obtained by the melting is accumulated in the molten lead accumulation part to form a lap piece integrated with the pole.

In the present invention, when the arrangement direction of a plurality of slits is defined as the X direction, the extension direction of the pole is defined as the Z direction, and the direction orthogonal to the X direction and the Z direction is defined as the Y direction, the All the ears are melted to form a lap piece. The melting action is centered on one ear inserted into the slit, and the Y direction is used as the welding direction of one ear, and the welding gun is in the X direction. The upward swing moves in the Y direction, thereby melting a part of one ear, a part of the base, and a part of the additional lead parts. In the specification of this case, the so-called swing refers to swinging the welding gun in the X direction. If the melting operation is performed for each ear part while swinging the welding torch as in the present invention, the molten lead can be sequentially accumulated in the molten lead accumulation part centering on one ear part. As a result, it is possible to prevent the occurrence of defective welding caused by insufficient melting, and to form an overlap sheet without defective welding.

The swing width of the swing is preferably specified so as not to melt the other adjacent ears. If you do this, you can prevent the occurrence of excessive melting of the ears.

After the melting operation for one ear is completed, move the welding torch to a position where the other adjacent ear becomes the center of the aforementioned swing, and implement the other ear, a part of the base, and the addition of lead parts Part of the melting action. Due to the lighter weight of the welding torch, the method of moving the welding torch can simplify the equipment used for welding.

If the molten lead accumulation part is divided into two or more areas, two or more welding torches are prepared, and the two or more welding torches are used to perform the melting operation in the two or more areas. In this case, it is also possible to form the lap piece in a short time.

When the average thickness of the lap is in the range of 6 to 10 mm and the width of the lap is in the range of 25 to 30 mm, the frequency of oscillation is preferably 3 ± 1 Hz, and the aforementioned welding gun is at Y The moving speed when moving in the direction is preferably a speed in the range of 60 to 190 cm/min, and the welding current is preferably a value in the range of 75A to 185A. In this case, if the moving speed increases, the welding current is increased, and if the moving speed decreases, the welding current is reduced.

In the second invention of this case, an electrode plate group is prepared in which a plurality of electrode plates having ears are laminated with a separator interposed therebetween. The jig of the molten lead accumulation part surrounded by the slits is arranged on the electrode plate group so that the plurality of ears of the electrode plate group penetrate the plurality of slits. In addition, the post lead part is arranged in the molten lead storage part, and the post lead part is provided with a post at the base part, and the base part has a plurality of through holes through which a plurality of ear parts are respectively penetrated. A plasma arc is sprayed on a part of a plurality of ears and a part of the base of the lead lead part to melt a part of the ears and a part of the base of the lead lead part, and the molten lead obtained by melting is accumulated in the molten lead accumulation. In the part, to form a lap piece integrated with the pole. Each of the plurality of through holes has a shape that penetrates the base of the lead post part in the Z direction and extends in the Y direction. In addition, a melting operation is performed on all of the plurality of ears to form the aforementioned lap piece, the melting operation is centered on one ear inserted into the through hole, and the Y direction is taken as the welding direction of one ear, The welding gun is moved in the Y direction while swinging in the X direction, thereby melting a part of one ear part and a part of the base part. According to the present invention, even when no additional lead parts are used, if the welding torch is swung for each ear and the welding action is performed, the molten lead can be sequentially accumulated in the molten lead accumulation centered on one ear. Department. As a result, it is possible to prevent the occurrence of defective welding caused by insufficient melting, and to form an overlap sheet without defective welding.

The swing width of the swing is preferably specified so as not to melt the other adjacent ears. If you do this, you can prevent the occurrence of excessive melting of the ears.

Furthermore, it is preferable that after the melting operation for one ear is completed, the welding torch is moved to a position where the other adjacent ear becomes the center of the swing, and the other ear is connected to the base. The melting action of a part of melting.

If the base of the pole lead part is divided into two or more areas, prepare two or more welding torches, and use two or more welding torches to perform melting in the two or more areas, and the lap will be longer In the case of the lap joint can also be formed in a short time.

In the second invention, similarly, when the average thickness of the strap is in the range of 6 to 10 mm and the width dimension of the strap is in the range of 25 to 30 mm, the frequency of oscillation is preferably 3±1 Hz, the moving speed of the welding gun in the Y direction is preferably a speed in the range of 60 to 190 cm/min, and the welding current is preferably a value in the range of 75A to 185A. At this time, if the moving speed increases, the welding current is increased, and if the moving speed decreases, the welding current is reduced.

Hereinafter, the embodiment of the welding mask device of 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 of the first embodiment of the present invention as shown in FIG. 1 is applied is formed by laminating a plurality of electrode plates with separators interposed therebetween. The electrode plate group and the electrolyte are housed in the electric tank together. Each electrode plate is equipped with lead ears, and electricity is collected by the straps connected to the ears, and charge and discharge are performed through the poles arranged on the straps.

The first embodiment of the lead-acid battery strap forming method is to prepare an electrode plate group in which a plurality of electrode plates each equipped with ears are laminated via a separator in the process of manufacturing such a lead acid battery. Later, the method performed when connecting the ears to each other to form a lap piece.

As shown in Fig. 2, a plurality of (7 in the first embodiment) ears 1 for each of a plurality of electrode plates (not shown) will be provided with a plurality of (and ears) penetrating through them. 1 The same is 7) slits 2, and a jig 4 that also has a molten lead reservoir 3 that completely surrounds the slits 2 so that the ears 1 of the electrode plate group penetrate the slits, respectively 2 and the form of projecting into the molten lead storage part 3 is arranged on the electrode plate group having the posture of extending the ear part 1 upward.

Then, in the molten lead accumulation portion 3, a post lead part 7 is arranged along the plurality of ears 1. The post lead part 7 is provided with a post 6 on the base part 5, and additional lead parts are arranged on the plurality of ears 1. 8. The additional lead part 8 has an E-shaped cross-sectional shape in a direction orthogonal to the longitudinal direction. If the additional lead part 8 having such a cross-sectional shape is used, the molten lead easily flows into the periphery of the ear 1. In addition, the shape of the additional lead part 8 is not limited. For example, it may be a part whose cross-sectional shape in a direction orthogonal to the longitudinal direction is a U-shape or a U-shape.

Then, from the welding torch of the plasma welding device, a plasma arc is sprayed on a part of the base 5 of the lead lead part 7 and the additional lead part 8 to make a part of the base 5 of the lead lead part 7 and the additional lead part 8 and a plurality of A part of the ear part 1 is melted, and the molten lead obtained by melting is accumulated in the molten lead accumulation part 3 to form a strap 9 integrated with the pole 6. In addition, the terminal lead parts 7, the additional lead parts 8 and the ear parts 1 are all made of lead or lead alloy.

In each figure, when the arrangement direction of the plurality of slits 2 is defined as the X direction, the extension direction of the pole 6 is defined as the Z direction, and the direction orthogonal to the X direction and the Z direction is defined as the Y direction, All the ears of the plurality of ears 1 perform a melting action to form the lap piece 9, wherein the melting action is centered on one ear 1 inserted into the slit 2, and the Y direction is taken as the one ear The welding torch that sprays the plasma arc downward moves in the Y direction while swinging in the X direction (weaving), thereby making a part of the ear 1 part, a part of the base part 5, and a part of the additional lead part 8 melt. The swing here refers to swing the welding torch in the X direction.

The melting operation accompanying this swing will be described with reference to Fig. 1. In addition, although Fig. 1 shows the completed lap piece 9 for convenience of description, the lap piece 9 is not yet formed before the melting operation ends. The outline of the lap piece 9 almost overlaps the shape of the inner surface of the molten lead reservoir 3, so it is located above the molten lead reservoir 3 surrounding each ear 1 penetrating through the slit 2, indicating that the welding gun is relative to each ear What kind of positional relationship does the part 1 move?

In Fig. 1, the moving path 10 of the welding gun on the plane above the lap piece 9 is indicated by a broken line. The moving path 10 of the welding gun is shown from the starting point 10s to the end point 10e, but after reaching the starting point 10s and/or after reaching the end point 10e, the welding gun can also be made to follow other paths (for example, the boundary between the base 5 and the additional lead part 8 ) Move to perform melting action.

The moving path 10 of the welding torch, first, starting from the starting point 10s near the lower end of the ear 1 at the right end in the X direction, while swinging the welding torch in the X direction, the welding torch is moved to the Y direction which is the welding direction of the ear 1. Up to a point beyond the upper end of the ear 1 in the Y direction. Thereby, a part of the ear part 1 at the right end in the X direction, a part of the base part 5, and a part of the additional lead part 8 are melted.

The swing width of the swing in the first embodiment of FIG. 1 is defined to be almost the same as the width of the ear 1 in order not to melt the other adjacent ear 1. Thereby, it is possible to prevent the occurrence of excessive melting of the ear 1. The swing width that does not cause excessive melting is determined in accordance with the size of the lap and the amount of lead that is melted, or the moving speed of the welding gun, the welding current, and the period of swing.

In the first embodiment, the average thickness of the lap 9 is about 8mm, and the width of the lap 9 is about 30mm. In order to fully cover and melt the Y-direction dimension of the ear 1 of about 15mm, the welding gun is 10s from the starting point. In the process of moving 20mm (at a speed of 60cm/min) in the Y direction for 2 seconds, 5 cycles of oscillation are required, so the frequency of oscillation is 2.5 Hz. The welding current is set to 100A. With this welding condition, since the melting operation is performed while swinging the welding torch for each ear, it is possible to sequentially accumulate molten lead in the molten lead accumulation part centering on one ear. As a result, it is possible to prevent the occurrence of poor welding caused by insufficient melting, and to form a lap piece that does not have poor welding. Whether poor melting occurs is confirmed by ultrasonic flaw detection test (non-destructive test). In addition, the most suitable condition is determined based on the following principle: if the moving speed is increased or the frequency of swing is reduced, the welding current becomes larger, and if the moving speed is slowed or the frequency of swing is increased, the welding current becomes smaller.

After the melting action for the ear 1 at the right end in the X direction is completed, as shown by the moving path 10 of the welding gun, move the welding gun to the adjacent X direction from the point near the upper end of the ear 1 at the right end in the X direction in the Y direction The position near the lower end of the second ear in the Y direction from the right end to be the center of swing. During this process, the welding torch temporarily stops jetting the plasma arc, or the moving speed of the welding torch can also be increased so that excessive melting does not occur. Then, as shown by the moving path 10 of the welding torch, starting from the vicinity of the lower end of the second ear 1 in the Y direction, the welding torch is moved to the vicinity of the upper end while swinging to implement a part of the second ear 1 and the base 5 Part of the lead part 8 and a part of the lead part 8 are added with a melting action. Since the weight of the welding torch is lighter than that of the electrode plate group, the method of moving the welding torch can simplify the equipment used for welding compared to moving the electrode plate group.

If the melting operation accompanied by the swing of the welding torch as described above is performed for each ear part 1 one by one, it is possible to sequentially accumulate molten lead in the molten lead accumulation part 3 centering on each ear part 1. Once the welding gun finally reaches the end point 10e near the upper end of the Y-direction of the ear 1 at the left end in the X-direction, the lap joint is completed.

As described above, if the lead-acid battery strap forming method according to the first embodiment performs the melting operation while swinging the welding torch for each ear 1, as a result, it is possible to prevent poor welding caused by insufficient melting. Occurred, and formed a lap piece without poor welding.

By adjusting the number of welding guns, melting current, or moving speed, the method of forming the straps of the first embodiment can obviously be applied to a wide range of lead storage batteries with different sizes or capacities. For example, the straps are longer. If there are more than 20 ears to be melted, if the molten lead accumulation part is divided into two or more areas, prepare two or more welding torches, and use two or more welding torches to separate the two or more areas. Performing a melting action on 10 ears can form a lap piece in a short time.

(Examples) In the examples, the average thickness, width dimension, frequency of oscillation, the moving speed of the welding gun, and the welding current of the laps were changed to perform lap welding, and it was confirmed that the range where good welding results can be obtained. The results are shown in the following table. In addition, the following welding results are performed by the same method as the confirmation method of the melting failure in the conditions of the above example, and the result "good" means that there is no melting failure. It was also confirmed that if the conditions in Table 1 below are deviated, the possibility of poor welding due to poor melting becomes higher. According to the example changed to the following conditions, it can be confirmed that when the average thickness of the lap sheet is a value in the range of 6 to 10 mm, and the width dimension of the lap sheet is a value in the range of 25 to 30 mm, The frequency of oscillation is preferably 3±1 Hz, the moving speed of the welding torch when moving in the Y direction is preferably a value in the range of 60 to 190 cm/min, and the welding current is preferably a value in the range of 75A to 185A.

[Table 1]

(Second embodiment) Fig. 3 is a diagram in the same format as Fig. 2, which shows the arrangement of each member before applying the method of forming the strap of the lead storage battery of the second embodiment of the present invention. The members shown in FIG. 2 and the members having the same function are denoted by the same reference numerals, and the description thereof is omitted.

In Fig. 3, a post lead part 11 is arranged in the molten lead storage part 3. The post lead part 11 is provided with a post 12 on a base 13, and the base 13 has a through hole 14, in order to provide a plurality of (7) ears. Each of the through holes 14 and the ears 1 have the same number (7) and the same intervals, and the size of the ears 1 in plan view is slightly larger than the size of the ears 1 in the plan view. In addition, if the welding operation accompanied by swinging of the welding gun as shown in Fig. 1 is implemented, even when no additional lead parts are used, it is possible to center one ear 1 as in the first embodiment. Then, the molten lead is accumulated in the molten lead storage part 3 in order. As a result, it is possible to prevent the occurrence of poor welding caused by insufficient melting, and to form a lap piece that does not have poor welding.

The other functions, changes, improvements, etc. are also the same as in the first embodiment. In addition, regarding welding conditions, it has been confirmed that better results can be obtained based on the same welding conditions as in Table 1 above.

(Industrial Applicability) According to the method of forming the strap of the lead storage battery of the present invention, it is possible to prevent the occurrence of poor welding when the plasma welding device is used to form the strap of the lead storage battery.

1‧‧‧Ear 2‧‧‧Slit 3‧‧‧Molten lead accumulation section 4‧‧‧Fixture 5‧‧‧Base 6‧‧‧Pole 7‧‧‧Pole Lead Parts 8‧‧‧Add lead parts 9‧‧‧Lap piece 10‧‧‧Moving path of welding gun 10s‧‧‧Starting point 10e‧‧‧End 11‧‧‧Pole Lead Parts 12‧‧‧Pole 13‧‧‧Base 14‧‧‧Through hole

Fig. 1 is a plan view showing the movement path of the welding gun of the plasma welding device in the first and second embodiments of the method of forming the strap of the lead-acid battery of the present invention. Fig. 2 is a perspective view showing the arrangement of various members before the method of forming a strap of the first embodiment is applied. Fig. 3 is a perspective view showing the arrangement of each member before the strap forming method of the second embodiment is applied.

Domestic hosting information (please note in the order of hosting organization, date, and number) None

Foreign hosting information (please note in the order of hosting country, institution, date, and number) None

1‧‧‧Ear

6‧‧‧Pole

9‧‧‧Lap piece

10‧‧‧Moving path of welding gun

10s‧‧‧Starting point

10e‧‧‧End

Claims (6)

A method for forming a lead-acid battery strap is characterized in that it is carried out according to the following method: first, a plurality of electrode plates with ears are laminated via a separator to form an electrode group, and then a plurality of ears are provided. A jig with a plurality of slits penetrating and equipped with a molten lead accumulation portion that completely surrounds the plurality of slits, and is arranged in the foregoing so that the plurality of ears of the electrode plate group penetrates the plurality of slits On the electrode plate group, the lead post part is arranged in the molten lead storage part, the lead lead part is provided with a post at the base part, and the base part has a plurality of through holes for the plurality of ear parts to penetrate respectively, and then, from A welding gun for plasma welding sprays a plasma arc on a part of the plurality of ears and a part of the base of the lead lead part to melt a part of the ears and a part of the base of the lead lead part , And accumulate the molten lead obtained by melting in the molten lead accumulation portion to form a lap piece integrated with the pole; wherein, when the arrangement direction of the plurality of slits is defined as the X direction, the pole When the extending direction of the post is defined as the Z direction, and the direction orthogonal to the aforementioned X and Z directions is defined as the Y direction, the plurality of through holes each have the aforementioned base portion penetrating the lead lead part of the aforementioned pole in the aforementioned Z direction and The aforementioned shape extending in the Y direction; and In addition, a melting operation is performed on all of the plurality of ears to form the lap piece, and the melting operation is centered on the one ear inserted into the through hole, and the Y direction is regarded as the one ear. The welding direction of the part, and the welding torch swings in the X direction, so that a part of the one ear part and a part of the base part are melted; the swing width of the swing is so as not to melt the other adjacent ear parts The average thickness of the aforementioned lap piece is a value in the range of 6~10mm, the width dimension of the aforementioned lap piece is a value in the range of 25~30mm, and the frequency of the aforementioned oscillation is 3±1Hz, The moving speed of the welding gun when moving in the Y direction is a speed in the range of 60 to 190cm/min, the welding current is a value in the range of 75A to 185A, and if the moving speed becomes faster, the welding current If the moving speed decreases, the welding current decreases. 2. The method of forming a lead-acid battery strap according to claim 1, wherein after the melting operation for one of the ears is completed, the welding torch is moved so that the adjacent one of the ears becomes the The position of the center of the swing is performed, and the melting operation of melting the other ear and a part of the base is performed. The method for forming a strap of a lead storage battery according to claim 1 or 2, wherein the base portion of the lead post part is divided into two For more than one area, two or more welding torches are prepared, and the two or more welding torches are used to perform the melting operation in each of the two or more areas. A method for forming a lead-acid battery strap is characterized in that it is carried out according to the following method: first, a plurality of electrode plates with ears are laminated via a separator to form an electrode group, and then a plurality of ears are provided. A jig with a plurality of slits penetrating and equipped with a molten lead accumulation portion that completely surrounds the plurality of slits, and is arranged in the foregoing so that the plurality of ears of the electrode plate group penetrates the plurality of slits On the electrode plate group, and in the molten lead accumulation portion, a pole lead part is arranged along the plurality of ears, and one or more additional lead parts are arranged above the plurality of ears, wherein the pole lead part The base is provided with a pole, and then, from a welding gun for plasma welding, a plasma arc is sprayed on a part of the base of the pole lead part and the one or more additional lead parts to make the base of the pole lead part A part of the aforementioned additional lead parts, and a part of the aforementioned plurality of ear parts are melted, and the molten lead obtained by melting is accumulated in the aforementioned molten lead storage part to form a lap piece integrated with the aforementioned pole; The arrangement direction of the aforementioned plurality of slits is defined as the X direction, and the extension direction of the aforementioned pole is defined as the Z direction, which will be the same as the aforementioned X When the direction perpendicular to the Z direction is defined as the Y direction, all of the aforementioned plural ears are melted to form the aforementioned lap piece, and the melting action is based on one of the aforementioned ears inserted into the aforementioned slit. Center, and the Y direction is used as the welding direction of the one ear, and the welding gun is swung in the X direction, thereby making part of the one ear, part of the base, and part of the additional lead part Melting; The swing width of the aforementioned swing is specified in a way that does not melt other adjacent ears; the average thickness of the aforementioned lap piece is a value in the range of 6-10mm, and the width dimension of the aforementioned lap piece is In the range of 25~30mm, the frequency of the aforementioned oscillation is 3±1Hz, the moving speed of the aforementioned welding gun in the aforementioned Y direction is within the range of 60 to 190cm/min, and the welding current is 75A~ A value in the range of 185A, and if the moving speed becomes faster, the welding current becomes larger, and if the moving speed becomes slow, the welding current becomes smaller. The lead-acid battery strap forming method according to claim 4, wherein after the melting operation for one of the ears is completed, the welding torch is moved so that the adjacent one of the ears becomes the swinging In the center position, the melting operation of melting a part of the other ear part, a part of the base part, and a part of the additional lead part is performed. The method for forming a lead-acid battery strap according to claim 4 or 5, wherein the molten lead accumulation portion is divided into two or more areas, two or more welding guns are prepared, and the two or more welding guns are used To perform the aforementioned melting operation in the aforementioned two or more regions.

Images