JP2009026463A - Manufacturing method of electrode plate group for mono block type lead acid storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of an electrode plate group 11 for a mono block type lead acid storage battery in which temperature rise of a resistance welding part 6 of a crossing portion electrode pole 1 hardly occurs by resistance heat generation even if discharge is made by a large current. <P>SOLUTION: A crossing portion electrode pole 1 having a resistance welding part 6, a bottom part 8, and a side part 9 is used. An adding lead 18 is melted and dropped using a burner 17 at the surrounding of an ear portion 5 of the electrode plate interposed by the crossing portion electrode pole 1 and comb teeth 16, and by heating alternately the ear portion 5 and the bottom part 8 of the crossing portion electrode pole 1 and moving the burner, they are welded. When melting the adding lead 18 by using the burner 17, a metal shielding plate 19 is used to cut off the heat from the burner 17. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method of manufacturing an electrode plate group for a monoblock lead-acid battery.

  A monoblock type lead-acid battery has a structure in which a plurality of electrode plate groups are connected in series, and usually has a characteristic that a high voltage of 12V or 24V can be obtained. First, it is widely used in electric vehicles, DC power supply devices, portable devices, and so on.

  In these monoblock lead-acid batteries, a battery case 13 having a substantially rectangular parallelepiped shape is used as a DC power supply device or a portable device, and a positive electrode terminal 14 and a negative electrode terminal 15 are provided at one end of the lid 12 on the upper surface. (For example, in FIG. 2A, the positive electrode terminal 14 and the negative electrode terminal 15 are disposed on the right side portion of the lid 12 on the upper surface). That is, in the battery case 13, the electrode group 11 is arrange | positioned so that it may return to U shape, and each is electrically connected in series (FIG.2 (c)).

  Thus, by arranging the positive electrode terminal 14 and the negative electrode terminal 15 at one end of the lid 12, the terminals can be arranged close to each other. Therefore, when using a large number of monoblock lead-acid batteries in a cubicle, such as a DC power supply, install the battery so that the positive terminal 14 and the negative terminal 15 are on the front side. Thus, work such as wiring, maintenance and inspection can be facilitated.

  Monoblock lead-acid batteries having these structures are manufactured by the following means (FIG. 2). As the battery case 13, for example, one having six spaces partitioned inside by partition walls 4 is used, and each partition wall 4 has five pieces punched beforehand as shown in FIG. 2 (b). The through-hole 10 is formed.

  Next, the electrode plate group 11 to which the transition pole 1, the intermediate pole 2, the strap 3, etc. are welded is inserted into six spaces partitioned by the partition 4. The crossing pole column 1 and the intermediate pole column 2 of the plurality of electrode plate groups 11 are electrically connected in series by resistance welding and sealed with a lid 12 for manufacturing. Note that the electrode plate group 11 of the monoblock type lead-acid battery having the structure shown in FIG. Resistance welding is performed at the portion of the pole 1 (FIG. 2 (c)).

  Here, the electrode group 11 having the conventional transition pole 1 has been manufactured as shown in FIG. That is, the positive electrode plate and the negative electrode plate are laminated via a separator, and the ear part 5 of these electrode plates is sandwiched between a pair of comb teeth 16, and a crossover part having a resistance welding part 6 and a bottom part 8 as a lead Install pole 1 In this state, the burner 17 is added as a welding device to melt the lead 18, and the melted lead is dropped and solidified on the welded part around the ear part 5 and the transition pole 1 and then released. Thus, the electrode plate group 11 having the strap 3 is manufactured.

  In addition, as described above, in addition to the method of manufacturing the lead storage battery electrode group 11 by adding the burner 17 and melting the lead 18 as a welding device, a lead component having a special shape is placed on the lead. And a method of welding by using, and a method of heating and welding using a plasma welding apparatus or the like have been studied (for example, see Patent Document 1).

JP 2005-347183 A

  However, as described above, when the monoblock type lead-acid battery using the electrode plate group 11 having the transition pole 1 having the conventional shape is discharged with a large current of about 3.5 CA, for example, Due to this resistance heat generation, the temperature of the resistance welded portion 6 of the transition pole 1 rises to around 160 ° C. As a result, there was a problem that the portion of the partition wall 4 made of thermoplastic resin around the through hole 10 in contact with the resistance weld 6 was heated and damaged. And by detailed temperature measurement, the temperature rise due to resistance heat generation is resistance welded so that it returns to a U shape rather than the resistance welded portion 6 of the intermediate pole column 2 that is resistance welded in a linear direction. It became clear that it was particularly remarkable in the resistance welding part 6 of the connecting pole pole 1.

  If the resin partition wall 4 around the through-hole 10 is heated and damaged, the inside of the monoblock lead-acid battery becomes poorly sealed, or resistance welding of the transition pole column 1 occurs due to the electrolyte rising. It has been recognized that corrosion occurs in the portion 6 and that the resistance weld portion 6 breaks.

  An object of the present invention is to solve the above-described problem, and even when a discharge is performed with a large current, the temperature of the resistance welded portion 6 of the transition pole column 1 is unlikely to increase due to resistance heating at that time. It is to provide a manufacturing method of the electrode plate group 11 of the block type lead-acid battery.

  In order to solve the above-described problems, the present invention is characterized in that the shape of the transition pole 1 is improved and the welding method with the ear is improved.

  That is, the invention of claim 1 is a method of manufacturing an electrode plate group for a monoblock type lead-acid battery, which is manufactured by welding the transition pole pole 1 to the ear portion 5 of the electrode plate sandwiched between the comb teeth 16. The transition pole 1 is composed of a resistance weld 6, a bottom 8 and a side 9, and the lead 18 is heated, melted and dropped using a welding device, and the welding device is moved. In this case, the vicinity of the ear portion 5 and the vicinity of the bottom surface portion 8 of the transition pole 1 are alternately heated and welded.

  The invention of claim 2 is characterized in that, in the invention of claim 1, when the additional lead 18 is melted, the shielding plate 19 is used for welding while shielding heat from the welding apparatus. It is.

  As an effect of the present invention, even if the discharge is caused by a large current, the temperature increase of the resistance welding portion 6 of the transition pole column 1 hardly occurs due to the resistance heating at that time. A manufacturing method can be provided.

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

1. Method for Producing Electrode Group In the monoblock lead-acid battery according to the present invention, the shape of the transition pole column 1 is improved in the pair of electrode groups 11 constituting the transition part. That is, as shown in FIG. 1 (a), in addition to the conventional resistance welded portion 6 and the bottom surface portion 8, the transition pole 1 according to the present invention includes a side surface portion 9 facing in the vertical direction. It is characterized by comprising.

  Next, the positive electrode plate and the negative electrode plate are laminated with a separator in the same manner as in the prior art, and the ear portions 5 of these electrode plates are sandwiched between the comb teeth 16. Then, as the lead, the crossover pole column 1 according to the present invention, which is composed of the resistance welding portion 6, the bottom surface portion 8 and the side surface portion 9, is installed adjacently (FIG. 1 (a)).

  In this state, using a welding device, for example, a burner 17, the ear portion 5 of the comb teeth 16 portion and the crossing pole column 1 are lightly heated in advance. Then, the lead 18 is heated and dissolved by the burner 17, and the dissolved lead is dropped on the welded portion around the ear portion 5 and the transition pole pole 1, and the ear portion 5 and the transition pole pole 1 are connected. Weld. The burner 17 was welded by alternately heating the vicinity of the ear portion 5 and the vicinity of the bottom surface portion 8 of the transition pole 1 while moving. Further, when the welding is performed while stirring the dissolved lead using a carbon stirring rod at the time of welding, the strap 3 having a clean surface can be manufactured.

  Here, when the lead 18 is melted, heat from the burner 17 is used by using a metal plate, for example, a copper shielding plate 19, so that the side surface portion 9 of the transition pole 1 is not heated and melted. It was made to block (FIG.1 (b)). Therefore, at the time of welding, the side part 9 of the transition pole 1 is not heated and melted by the heat from the burner 17.

  Thereafter, it was solidified and released from the mold, and the electrode plate group 11 constituting the transition part having the strap 3 was manufactured (FIG. 1 (c)). It should be noted that the electrode plate group 11 constituting the crossing portion disposed at the opposing position via the partition wall 4 was also manufactured in the same manner.

  The intermediate electrode pole 2 other than the transition pole 1 was welded by a conventionally used technique to produce the electrode plate group 11. Further, as described above, in addition to the method of adding the burner 17 as a welding apparatus and heating and melting the lead 18, welding can be performed by heating using a plasma welding apparatus or the like.

2. Production / Discharge Test of Monoblock Lead Acid Battery A monoblock lead acid battery of 12V-167Ah (10 hour rate discharge capacity) was produced using the electrode plate group described above. This monoblock lead-acid battery has a structure in which a positive electrode terminal 14 and a negative electrode terminal 15 are arranged on the right side portion of the lid 12 (FIG. 2).

  As the battery case 13 made of resin, one having six spaces partitioned inside by partition walls 4 is used, and each partition wall 4 is previously punched, as shown in FIG. Five through holes 10 used for resistance welding are formed in advance.

  Next, six electrode plate groups 11, to which the transition pole 1, the intermediate pole 2, the strap 3 and the like are welded, are inserted into the spaces partitioned by the partition walls 4. The crossing pole column 1 and the intermediate pole column 2 of the opposing electrode plate group 11 are electrically connected in series by resistance welding, and sealed with a lid 12 to manufacture a monoblock type lead-acid battery. . In addition, the electrode plate group 11 inside the manufactured monoblock type lead-acid battery includes an intermediate pole column 2 that performs resistance welding in a linear direction, and a transition pole column that changes the connection to a U-shape and connects them. Resistance welding is performed on the portion 1 (FIG. 2C).

  When the monoblock type lead-acid battery according to the present invention was discharged with a large current of 3.5 CA (585 A), the temperature of the resistance welded portion 6 of the transition pole 1 was about 100 even at the highest temperature due to resistance heat generation. It can be set to 120 ° C. or lower, which is the design value of the damage temperature of the partition wall 4 (FIG. 4A).

  Accordingly, the resin partition wall 4 around the through-hole 10 is not damaged, and the interior of the monoblock lead-acid battery becomes poorly sealed or breaks at the resistance weld 6 due to the electrolyte rising. There is no problem.

  On the other hand, as shown in FIG. 3, in the conventional monoblock type lead-acid battery using the transition pole pole 1, the temperature of the resistance weld 6 of the transition pole pole 1 is the highest temperature. The temperature reached 160 ° C. (FIG. 4B).

  For this reason, the transition pole 1 according to the present invention is excellent in conductivity because it has a side surface portion 9 facing the vertical direction in addition to the bottom surface portion 8 as shown in FIG. . Therefore, it is considered that the current 20 does not concentrate in the vicinity of the resistance welding position 21 of the resistance welding portion 6, and resistance heat generation during large current discharge can be suppressed.

  On the other hand, as shown in FIG. 5 (b), the conventional crossing pole 1 has only the bottom surface portion 8, so that the current 20 is concentrated near the resistance welding position 21 of the resistance welding portion 6, and thus the large This is thought to be because resistance heat generation during current discharge cannot be suppressed.

  INDUSTRIAL APPLICABILITY The present invention can be used in a method for manufacturing an electrode plate group of a monoblock lead-acid battery.

It is the schematic of the manufacturing method of the electrode group which concerns on this invention product. It is the schematic of a monoblock type lead acid battery. It is the schematic of the manufacturing method of the conventional electrode plate group. It is the schematic of the temperature change of a resistance welding part. It is the schematic of the electric current at the time of discharge.

Explanation of symbols

1: Transition pole, 2: Intermediate pole, 3: Strap, 4: Bulkhead, 5: Ear,
6: Resistance welded part, 8: Bottom part, 9: Side part, 10: Through hole, 11: Electrode group, 12: Lid
13: battery case, 14: positive terminal, 15: negative terminal, 16: comb teeth, 17: burner,
18: Additional lead, 19: Shield plate, 20: Current, 21: Resistance welding position

Claims (2)

In the manufacturing method of the electrode plate group for the monoblock type lead-acid battery, which is manufactured by welding the transition pole pole 1 to the ear portion 5 of the electrode plate sandwiched between the comb teeth 16,
The transition pole 1 is composed of a resistance weld 6, a bottom 8, and a side 9, and using a welding device, the lead 18 is heated, melted, dropped, and the welding device is moved. A method of manufacturing a group of electrode plates for a monoblock type lead-acid battery, wherein the vicinity of the ear portion 5 and the vicinity of the bottom surface portion 8 of the transition pole 1 are alternately heated and welded. 2. The production of an electrode plate group for a monoblock type lead-acid battery according to claim 1, wherein when the additional lead 18 is melted, the shielding plate 19 is used for welding while shielding heat from the welding device. Method.

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