JPS6056A - Formation of plate for lead-acid battery - Google Patents

Abstract

PURPOSE:To completely automate formation process and eliminate formation defectives by forming a plate group by installing cast on welding part in lugs of stacked anode plate and cathode plate, and bringing the welding part into contact with a conductive connector in a formation bath, and applying a formation process. CONSTITUTION:An anode plate 1 having lugs 2 and 3 in the upper and lower parts of its one side and a cathode plate 4 having lugs 5 and 6 are stacked symmetrically about right and left sides with a separating body 7 or separating plate sandwiched. Lugs 2, 3, 5, and 6 are connected by cast on welding to form a plate group 9. The plate group 9 is inserted into a formation bath 14 comprising acid resistant material and cast on welding parts 11 and 13 of the lower part of the plate group 9 is brought into contact with projections 18 and 19 of an acid resistant conductive connector 15 comprising lead installed in the lower part of the formation bath 14. After baths are connected, current is made to flow for formation. By this process, formation is automated and formation defectives caused by contact failure is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to automation of formation of electrode plates for lead-acid batteries.

Conventionally, the method of chemically forming electrode plates for lead-acid batteries has been to alternately use unformed negative and anode plates and maintain appropriate spacing so that adjacent negative and anode plates do not touch each other, and to form an acid-resistant chemical compound filled with dilute sulfuric acid. After inserting it into the tank, welding connecting lead alloy bars for energization to the respective ears of the negative and anode plates for energizing chemical conversion, or a metal feeding method having a groove in the bottom of the acid-resistant chemical conversion tank. After providing a gold connecting conductor and filling it with dilute sulfuric acid, insert the unformed negative and anode plates into the groove alternately and maintaining appropriate intervals so that adjacent negative and anode plates do not come into contact with each other. A method was adopted in which a connecting conductor and a current-carrying circuit were formed and chemical formation was performed. However, the above method has three points: ■ inserting the unformed negative and anode plates into the chemical conversion tank alternately at appropriate intervals, ■ connecting the connecting part and the ears of the electrode plates by welding, Manual work is required to insert the anode plates alternately into the grooves of the connecting conductors at the bottom of the chemical conversion tank, and to pull up the negative and anode plates after chemical formation has been completed so as not to burn them out. This was a major obstacle in automating the process.

The present invention eliminates the above-mentioned drawbacks and completely automates the chemical conversion process, and will be explained in detail below using an example.

In the drawings, Figures 1 and 2 are unformed shadows.

1 is a front view of an anode plate, where 1 is an unformed cathode plate having ears 2 and 6, and 4 is an unformed anode plate having ears 5 and 6.

5 and 4 are a front view and a plan view of an acid-resistant separator 7, and FIGS. 5 and 6 are a front view and a plan view of a porous acid-resistant separator 8. . 7 and 8 are a front view and a side view of a state in which negative and anode plates 1, 4 and separators 7 are alternately stacked. Figures 9 and 10 are negative and anode plates 1
, 4 are respectively front and side views of the electrode plate group 9 formed by connecting the ear parts 2, 3, 5.6 by cast-on welding. be. FIG. 11 is a cross-sectional view of the main part of the chemical conversion tank 14 made of acid-resistant material, in which the cast-on welding part 11.13 at the bottom of the electrode plate group 9 is connected to the protrusion 1 of the acid-resistant conductive connector 15.
An interspecies connection is made by contacting 8.19.

Note that 16 is an insulator between the connecting body 15 and the chemical conversion tank 14, and 17 is an electrolyte.

Next, the method of the present invention having the above configuration will be explained. A cathode plate 1 having ears 2 and 3 on the upper and lower sides of one side and @ electrode plate 4 having ears 5 and 6 are formed, and the ears 2 and 6 of the cathode plate 1 and the ears 5 and 6 of the anode plate 4 are arranged on the left and right sides. Cathode plate 1 and v so that they are in symmetrical positions
After the quadrupole plates 4 are alternately stacked with the separators 7 or 8 interposed therebetween, each cathode plate and each anode plate are respectively stacked on the ears 2.3.
, 5.6, connect by cast-on welding to form the electrode plate group 9, and then the electrode plate group 9 is made of acid-resistant material, such as lead or sill metal, ebonite, or FRP. A protrusion of an acid-resistant conductive connection body, for example a connection body 15 made of lead or lead alloy, which is inserted into a chemical conversion tank 14 and has a cast-on welded portion 11.13 at the bottom of the electrode plate group 9 at the bottom of the conversion tank 14. 18. Contact with 19 to make an interspecies connection and carry out energization.

As described above, in the present invention, the ears of the negative and 5M electrode plates are connected by cast-on welding, so the spacing between the ears of the negative and anode plates may vary during stacking, and the tips of the ears may Even if the height varies slightly, it is not a problem because the molten lead that serves as the current-carrying part melts the ears, so the stacking process can be easily automated. In addition, even if an oxide film adheres to the ear and makes it difficult to weld, at least the ear is wrapped in the current-carrying part, so if it has sufficient mechanical strength necessary for handling the electrode plate group, First, the welded portion will not corrode and be destroyed due to insufficient welding during the short chemical formation time, which is generally about 10 to 20 hours.

In addition, since the ear part and the cast-on welding part are mechanically and rigidly connected, the entire electrode plate group can be carried in suspension by grasping an appropriate part of the cast-on welding part. It becomes possible to mechanically insert the group into the chemical conversion tank and to pull up the electrode plate group after chemical conversion from the chemical conversion tank without short-circuiting the negative and anode plates, and the transportation process can be automated.

Furthermore, the contact between the cast-on weld at the bottom of the electrode plate group and the protruding part of the acid-resistant conductive connector is ensured at several points due to the weight of the electrode group, making the connection impossible to completely eliminate in the past. It is possible to eliminate chemical formation defects caused by insufficient chemical formation.

The group of electrode plates after Mio chemical formation is taken out from the chemical conversion tank, washed with water, and then moved on a conveyor while passing through the cutter i section, thereby making it possible to cut them with extremely high efficiency.

As described above, the present invention enables complete automation of the chemical conversion process, which was previously impossible, and eliminates chemical conversion defects due to insufficient contact, and has extremely great industrial value.

[Brief explanation of drawings]

Figures 1 and 2 are front views of the anode and anode plates, Figure 6,
Figure 4 shows a front view and a plan view of the separator, Figures 5 and 6 show a front view and a plan view of the separator, and Figures 7 and 8 show the negative and anode plates and the separator stacked alternately. State front and side views, No. 9
10 are a front view and a side view of the electrode plate group after cast-on welding, and FIG. 11 is a sectional view of the main part of the chemical conversion tank. 1: Land rice plate 2, 3, 5, 6: Ear part 4: Anode plate 7: V5 detachment 8: Separation plate 9: Plate group 10.11, 12, 13: Cast-on welding part 14:
Chemical measure 15: Acid-resistant conductive connector 18.19: Projection Applicant: Yuasa Battery Co., Ltd.

Claims (1)

[Scope of Claims] 1) A cathode plate and an anode plate having ears on the upper and lower sides of one side are formed, and the cathode plate and anode plate are separated so that the ears of the cathode plate and the ears of the anode plate are in symmetrical positions. After being alternately stacked through the spherules or separators, each cathode plate and each anode plate are connected at the ears by cast-on welding to form an electrode plate group, and then the electrode plate group is It is characterized by inserting it into a chemical conversion tank and bringing the cast-on welded part of the lower part of the electrode plate group into contact with the protrusion of the acid-resistant conductive connecting body provided at the lower part of the chemical forming unit U, thereby making an interspecies connection and carrying out energizing chemical formation. A method for forming electrode plates for lead-acid batteries. 2) The method for chemically forming an electrode plate for a lead-acid battery according to claim 1, wherein the chemical forming tank is made of an acid-resistant material.