JP4654694B2 - Method for producing lead-acid battery - Google Patents

Description

  The present invention relates to a method for manufacturing a lead storage battery.

  In a relatively large lead-acid battery, a paste-type positive electrode plate 1 and a negative electrode plate 2 manufactured by filling a current collector manufactured by a casting method with a paste-like active material, and drying and aging are used. As an example of the lead storage battery, FIG. 4 shows a schematic diagram of a general control valve type lead storage battery that has been conventionally used. That is, electrode plates such as the positive electrode plate 1 and the negative electrode plate 2 are laminated with the separator 3 interposed therebetween, and the tip end portions of the ear portions 18 of the positive electrode plate 1 and the negative electrode plate 2 are welded to the strap 6 having the pole column 9. An electrode plate group is formed.

  Here, a bushing (not shown) is formed in the terminal portion of the lid 5 in an embedded state by insert molding. The fitting portion between the bushing of the lid 5 and the pole column 9 is heat-welded, for example, burner welding or TIG welding to form a welded portion. Then, an epoxy adhesive is poured and filled from above, solidified and sealed, and the pole column 9 is firmly fixed to the lid 5.

  Here, a terminal 7 for connection to an external load is embedded above the pole 9. Then, a lead wire having a crimp terminal (not shown) attached to the terminal 7 is fixed to the terminal 7 by tightening with a bolt or the like.

  Here, in the step of filling the current collector manufactured by the casting method with the paste-like active material, the extra paste-like active material is converted into the frame bone (upper frame bone) of the current collector 15 as shown in FIG. 21, the lower frame bone 22, the vertical thick frame bone 23, and the vertical thin frame bone 24) and the ear portion 18 were found to stick out. In addition, it is recognized that extra paste-like active material adheres to both surfaces of the electrode plate.

  Therefore, conventionally, an operator holds a wire brush or the like in his / her hand and rubs an attached portion such as a frame bone to scrape off and remove the active material. Furthermore, an oxide film is also formed on the surface of the ear 18 to be welded with the lapse of time after casting.

  However, as described above, the method in which the worker scrapes off the active material attached to the current collector with a wire brush or the like is inferior in workability, has low reliability, and leads to an increase in manufacturing cost. And when paste-like active material adheres to a frame bone etc., the case where it falls out at the time of use of a lead acid battery, and the case where a short circuit is caused is recognized.

  In addition, if a paste-like active material adheres to the surface of the ear 18 or an oxide film is formed, welding may occur in the process of forming the strap 6 by welding to the pole column 9 in some cases. Admitted.

  The object of the present invention is to improve workability by automating the process of scraping off the active material adhering to the frame of the current collector of the positive electrode plate or the negative electrode plate, or removing the oxide film on the surface of the ear part. In addition, the present invention provides a method for producing a lead-acid battery that is highly reliable during welding and use.

In order to solve the above-mentioned problems, the active material attached to the thickness part of the frame bone of the current collector having the ear part and the foot part used for the positive electrode plate and the negative electrode plate is automatically scraped off by a rotating brush. The other parts of the frame bone are automatically scraped off by using a polishing blade.

  Furthermore, the oxide film on the tip portion of the ear portion is removed by cutting with an end mill and cutting with an upper blade and a lower blade.

That is, the invention of claim 1 according to the present invention provides a lead-acid battery manufacturing method using a paste-type electrode plate produced by filling a current collector with a paste-like active material. The upper frame bone having the ear portion, the lower frame bone having the foot portion, the vertical thick frame bone and the vertical thin frame bone,
A step of automatically scraping off the active material attached to the thickness portions of the upper and lower frame bones using a rotating brush;
Step of the active material adhered to a portion of the frame bone, using a polishing blade constructed by bundling overlapping a plurality of saw blades, scraping automatically,
It is characterized by going through .

  The invention of claim 2 is characterized in that, in the method for manufacturing a lead-acid battery according to claim 1, a blade of a gold saw is used as the saw blade.

The invention of claim 3 is a method of manufacturing a lead-acid battery according to claim 1 or claim 2, further
A step of automatically scraping off the active material adhering to both surfaces of the paste-type electrode plate with at least one or both of a scraping plate and a removing brush ;
It is characterized by going through .

The invention according to claim 4 is the method for producing a lead-acid battery according to any one of claims 1 to 3 , wherein the current collector uses a paste-type electrode plate having a welding ear portion. Is characterized by being cut before welding.

  According to a fifth aspect of the present invention, in the method for producing a lead-acid battery according to the fourth aspect, at least one of the upper surface and the lower surface of the tip portion is cut by an end mill.

  The invention of claim 6 is the method for producing a lead-acid battery according to claim 4 or claim 5, wherein the side surface of the tip portion is cut by an upper blade and a lower blade. is there.

  According to the method for producing a lead-acid battery according to the present invention, the step of scraping off the active material adhering to the frame of the current collector of the positive electrode plate or the negative electrode plate, or the step of removing the oxide film at the tip of the ear Therefore, it is possible to improve the workability and provide a highly reliable method for manufacturing a lead storage battery.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS.

  Here, FIG. 4 shows a schematic diagram of a general control valve type lead acid battery that has been conventionally used among the lead acid batteries. That is, electrode plates such as a positive electrode plate 1 and a negative electrode plate 2 filled with a paste-like active material in a lead alloy current collector 15 and dried and aged are laminated via a separator 3. The ears 18 of the positive electrode plate 1 and the negative electrode plate 2 are welded to the strap 6 having the pole column 9 to form an electrode plate group.

  Here, a bushing (not shown) is formed in the terminal portion of the lid 5 in an embedded state by insert molding. The fitting portion between the bushing of the lid 5 and the pole column 9 is heat-welded, for example, burner welded to form a welded portion. Then, an epoxy adhesive is poured and filled from above, solidified and sealed, and the pole column 9 is firmly fixed to the lid 5.

  Here, a terminal 7 for connection to an external load is embedded above the pole 9. Then, a lead wire having a crimp terminal (not shown) attached to the terminal 7 is fastened to the terminal 7 by using a bolt or the like.

  The current collector 15 immediately after casting used for the positive electrode plate 1 and the negative electrode plate 2 has a structure as shown in FIG. That is, in the figure, a frame bone (an upper frame bone 21, a lower frame bone 22, a vertical thick frame bone 23, and a vertical thin frame bone 24) having an ear portion 18 on the upper side and three foot portions 19 on the lower side The longitudinal inner bone 25 and the lateral inner bone 26 which are thinner than the frame bone are formed in a lattice shape inside thereof. In addition, one of the three feet 19 immediately after casting with the book mold type has a longer structure than the other two for reasons of the manufacturing process, but it is cut off by share etc. in the subsequent process. (FIG. 3).

  Since these current collectors 15 are cast in a book mold type, in order to facilitate release after casting, as shown in FIG. (FIG. 3). Here, it is desirable to fill only the inner part of the frame bone (upper frame bone 21, lower frame bone 22, vertical thick frame bone 23 and vertical thin frame bone 24) with a paste-like active material, In an industrial production process with mass productivity, there is a problem that the active material protrudes into the surrounding frame. In some cases, a paste-like active material may be deposited on the surface of the electrode plate and adhere to the surface.

  Therefore, in the method for manufacturing a lead storage battery according to the present invention, the thickness direction of the upper frame bone 21 and the lower frame bone 22 having the ears 18 and the legs 19 of the current collector 15 of the positive electrode plate 1 and the negative electrode plate 2 is determined. The active material was scraped off by brushing using a rotating brush 14, and the other frame bones were scraped off by scraping the active material using the polishing blade 13. In addition, the active material adhering to the surface of the electrode plate was scraped off by the scraping plate 28 and the removal brush 29.

1. Removal of Active Material by Polishing Process The removal of the active material will be described in detail with reference to FIGS. In FIG. 1, in order to facilitate understanding, a paste-type positive electrode plate 1 is used as an example, and the shape of the frame bone and inner bone of the current collector 15 that is actually filled with an active material is used. The following explanation will be given in a state where the above is visible.

  Here, the rotating brush 14 is a so-called wire brush produced by bundling a large number of metal wires. Then, an electrode plate, for example, the positive electrode plate 1 was passed between the pair of rotating brushes 14 as shown in the figure. Therefore, for the thick portions of the upper frame bone 21 and the lower frame bone 22 having the ear portion 18 and the foot portion 19 of the current collector 15, the attached active material can be scraped off by brushing using the rotating brush 14. (FIG. 1 (b)).

  The upper frame bone 21 and the lower frame bone 22 of the current collector 15 have ear portions 18 and foot portions 19 protruding outward, but since the rotating brush 14 is used, the ear portions 18 and foot portions 19 are used. Does not stop the manufacturing equipment.

  Next, as the polishing blade 13, as shown in FIG. 2, a blade in which a plurality of saw blades 12 were bundled and fixed to the frame 11 using a bolt 10 was used. Here, as the saw blade 12, a so-called gold saw blade was used. If a so-called gold saw blade is used as the saw blade 12, it is hard and hard to wear, and it is easy to arrange and store parts because it is inexpensive and easily available.

  Then, as will be described later, an active material attached to the frame bone (upper frame bone 21, lower frame bone 22, vertical thick frame bone 23 and vertical thin frame bone 24) using a plurality of polishing blades 13 for each step. The method of scraping off was used. 2 shows an embodiment in which three saw blades 12 are fixed to the frame 11 using bolts 10 as the polishing blade 13, but the number of saw blades 12 used is a current collector 15. Needless to say, it is adjusted as appropriate depending on the thickness and shape of the frame bone.

  In FIG. 1 (c), the positive electrode plate 1 is allowed to pass underneath the pair of polishing blades 13 so that the active material attached to the upper surface bone 21 and the lower frame bone 22 of the positive electrode plate 1. The material was scraped off and removed. When the above-described polishing blade 13 is used, the active material adhered almost completely can be scraped off by one pass.

  In FIG. 1 (d), four polishing blades 13 are used and are moved in the direction shown in the figure, whereby a vertical thick frame bone 23, a vertical thin frame bone 24, and a vertical thick frame bone on the upper surface of the positive electrode plate 1. The active material adhering to each of the portion of 23 convex portions 16 facing obliquely upward and the thickness method portion of the vertical thin frame bone 24 was scraped off and removed. Also in this case, the active material adhered almost completely can be scraped off.

  Then, the positive electrode plate 1 was subjected to a reversal process, and the active material adhered by the same method was scraped off and removed. That is, it is for scraping off the active material adhering to the frame bone part on the opposite surface.

  As shown in FIG. 1 (e), in the same manner as in FIG. 1 (c), the upper frame bone 21 of the positive electrode plate 1 is passed by passing the positive electrode plate 1 below the pair of polishing blades 13 in contact. The active material attached to the upper surface portion of the lower frame bone 22 is scraped off and removed.

  Next, in FIG. 1 (f), by using three polishing blades 13 and moving them in the illustrated direction, the vertical thick frame bone 23 and the vertical thin frame bone 24 on the upper surface of the positive electrode plate 1, The active material attached to the diagonally upward portion of the convex portion 16 of the thick frame bone 23 was scraped off and removed. As described above, the active material attached to the frame bone (upper frame bone 21, lower frame bone 22, vertical thick frame bone 23 and vertical thin frame bone 24) of the positive electrode plate 1 can be scraped off by the process of FIG. it can.

  In addition, as shown in FIG. 5, scraping using spring steel 27 is performed between the steps of FIG. 1 (a) to FIG. 1 (b) and between the steps of FIG. 1 (e) to FIG. 1 (f). All the active material adhering to both surfaces of the positive electrode plate 1 can be scraped off by passing under the removal brush 30 using the catch plate 28 or the pork hair 29 in order.

  When the present invention is used, the step of scraping off all the active material attached to the frame bone using the rotating brush 14 includes the upper frame bone 21 and the lower frame bone 22 having the ear portion 18 and the foot portion 19 of the current collector 15. In other processes, a polishing blade 13 mainly using a saw blade 12 is used. Therefore, dust generation due to winding during rotation can be significantly reduced as compared with the case where the brush 14 that rotates in all steps is used. Therefore, it is a preferable method in managing the work environment.

  In addition, compared to using a rotating wire brush 14, since the saw blade 12 is less consumed, the replacement period can be lengthened, and the effect of suppressing vibration and noise has also been recognized. Yes.

  In addition, even when the polishing blade 13 is replaced, it can be replaced for each frame 11, and the time required for the replacement can be shortened.

In the above example, the paste type positive electrode plate 1 has been described. However, the removal of the active material adhering to the frame portion and both surfaces of the paste type negative electrode plate 2 can be similarly performed.
2. Cutting of the tip portion of the ear portion When a paste-like active material adheres to the surface of the ear portion 18, particularly the tip portion, or an oxide film is formed, a process of forming a strap 6 by welding to the pole column 9 In this case, it is recognized that welding failure occurs. The oxide film on the surface of the ear 18 is formed by leaving it in the air for a certain period after casting. Therefore, the manufacturing method according to the present invention is characterized in that the welded portion of the ear portion 18, mainly the tip portion, is cut and welded immediately after the surface active material and oxide film are removed (FIG. 6). ).

  That is, as shown in FIG. 6, the upper surface 36 of the tip portion of the ear portion 18 and the lower surface (not shown) are cut by the end mill 31. Here, by cutting the upper surface 36 and the lower surface of the tip portion of the ear 18, the active material that could not be removed sufficiently and the oxide film can be removed, and the reliability in the welding process can be improved. Can do.

  Then, the upper surface processed portion 32 was formed on the upper surface 36 of the tip portion of the ear portion 18 by cutting with the end mill 31, and the lower surface processed portion (not shown) was formed on the lower surface of the ear portion 18. In the case of a small lead-acid battery, only one of the upper surface 36 or the lower surface of the ear portion 18 is cut, and only one of the upper surface processed portion 32 or the lower surface processed portion not shown is cut. Even if it forms, the reliability in a welding process can fully be improved.

  On the other hand, in the case of a large lead-acid battery or a lead-acid battery that is used for a long period of time exceeding 10 years and requires high reliability, the upper blade 35 and the lower blade are also provided on the side surface 37 of the ear 18. 34 was used for cutting. That is, the tip portion of the ear portion 18 obtained by cutting the upper surface 36 and the lower surface with the end mill 31 is installed on the lower blade 34, and this portion is cut by dropping the upper blade 35 downward from above. Thus, the side processed portion 33 is formed. In the embodiment shown in FIG. 6, the paste type positive electrode plate 1 has been described. However, the present invention can also be applied to a clad type positive electrode plate having an ear 18.

  As described above, in the process of forming the strap 6 by welding to the pole column 9 by cutting the surface of the tip portion of the ear portion 18 and welding after removing the active material and oxide film, Defects can be prevented, and a highly reliable lead-acid battery manufacturing method can be provided.

  The present invention can be mainly used for manufacturing lead-acid batteries using a paste-type positive electrode plate or negative electrode plate.

It is the schematic of the grinding | polishing process concerning this invention. It is the schematic of the polishing blade concerning this invention. It is the schematic of the electrical power collector by a casting system. It is a notch section perspective view of a control valve type lead acid battery. It is the schematic of the scraping board using spring steel, and the removal brush using pig hair. It is the schematic of the cutting process of the ear | edge part concerning this invention.

Explanation of symbols

1: positive electrode plate, 2: negative electrode plate, 3: separator, 4: battery case, 5: lid, 6: strap,
7: Terminal, 8: Safety valve, 9: Polar column, 10: Bolt, 11: Frame, 12: Saw blade,
13: Polishing blade, 14: Brush, 15: Current collector, 16: Convex part, 18: Ear part, 19: Foot part,
21: Upper frame bone, 22: Lower frame bone, 23: Vertical thick frame bone, 24: Vertical thin frame bone, 25: Vertical inner bone,
26: horizontal inner bone, 27: spring steel, 28: scraper, 29: pig hair, 30: removal brush,
31: End mill, 32: Upper surface processing portion, 33: Side surface processing portion, 34: Lower blade, 35: Upper blade,
36: upper surface, 37: side surface

Claims (6)

In a method for manufacturing a lead-acid battery using a paste-type electrode plate produced by filling a current collector with a paste-like active material, the frame bone of the current collector has an upper frame bone having an ear portion and a foot portion. It consists of lower frame bone, vertical thick frame bone and vertical thin frame bone,
A step of automatically scraping off the active material attached to the thickness portions of the upper and lower frame bones using a rotating brush;
Step of the active material adhered to a portion of the frame bone, using a polishing blade constructed by bundling overlapping a plurality of saw blades, scraping automatically,
The manufacturing method of the lead storage battery characterized by passing through .   The lead-acid battery manufacturing method according to claim 1, wherein a blade of a gold saw is used as the saw blade. further,
A step of automatically scraping off the active material adhering to both surfaces of the paste-type electrode plate with at least one or both of a scraping plate and a removing brush ;
The method for producing a lead-acid battery according to claim 1 or 2, wherein In a method for producing a lead-acid battery using a paste-type electrode plate having a welding ear on a current collector,
The tip portion of the ear portion is a lead-acid battery manufacturing method according to any one of claims 1 to 3, characterized in that it is the cutting before the welding. At least one of the upper surface or the lower surface of the tip portion is
5. The method for producing a lead-acid battery according to claim 4, wherein the end-mill is used for cutting. The side surface of the tip portion is
6. The method for producing a lead-acid battery according to claim 4, wherein cutting is performed with an upper blade and a lower blade.

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