JPS6327818B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement in the method of connecting positive and negative electrode plates of adjacent cells of a monoblock lead-acid battery consisting of a thermoplastic synthetic resin container and lid. It is something.

Conventional technology and its problems Conventionally, as a method for connecting cells, a through hole is provided in the battery case partition wall, and a protrusion piece of an L-shaped strap connected to the positive and negative electrode plates is pushed into the through hole. After pressing the two adjacent straps together through the abutment and abutting the protrusion pieces against each other, welding is carried out using a large current to bring the molten lead into close contact with the inner wall of the through hole, ensuring liquid tightness between the cells. A method of thermally welding the lid and the battery case has been proposed. However, this method has the disadvantage that when inserting the pole group, it requires a process of aligning the protrusion piece of the connecting conductor with the through hole, and an inspection process to confirm the welding strength after welding is completed. have.

Another method is to fill the gap by injecting synthetic resin into a mold that is tightly fitted around the notch through which the connecting conductor connecting the positive and negative electrode plates of adjacent cells is inserted. Another method is to thermally weld the lid and the battery case after ensuring liquid tightness between the cells. Although this method is effective because it does not require a welding process to connect cells,
During the manufacturing process, of course, there is a process of injection molding synthetic resin, which requires precision in the parts that make up the partition walls to prevent resin leakage, and injection molding requires a relatively large mold clamping force. ,
Since a suitable split mold is placed inside the battery case, it has the disadvantage that the range of production is limited by the battery dimensions.

Purpose of the Invention The present invention was devised in view of the above-mentioned conventional drawbacks, and is easy to work with, does not require a large capital investment, and is not limited by the battery size and can provide reliable liquid-tightness between cells. The present invention provides a method for manufacturing a lead-acid battery with extremely high cell-to-cell connections.

Structure of the Invention In order to achieve the above object, the present invention includes a connecting conductor 10 connecting the positive and negative electrode plate groups 8 and 9,
A battery case 1 has a battery case partition wall 5 provided with a notch 6 for a connecting conductor 10. The battery case 1 accommodates positive and cathode plate groups 8 and 9, and has a partition wall and a joint corresponding to the battery case partition wall 5. A step of preparing a lid 3 having a surface 4 and arranging a connecting conductor 10 in the container notch 6, then pressing the connecting conductor head 12 with a press-fitting jig 16,
An operation of press-fitting the connecting conductor 10 into the battery case notch 6;
A process consisting of an operation in which the press-fitting jig 16 forms a concave band 14 on the connection conductor head 12 and an operation in which the connection conductor 10 is brought into close contact with the battery case notch 6. Next, the joining surface 2 of the lid 3 and the battery case 1 is Next, the lid joint surface 4 is bonded to the container partition wall 5 and the connecting conductor head 1.
This method of manufacturing a lead-acid battery is characterized by comprising the steps of press-fitting and joining into the concave band 14 of No. 2.

Example Hereinafter, the present invention will be explained with reference to the drawings.

FIG. 1 is a partial front sectional view of an embodiment of the present invention, and FIGS. 2 to 5 are partial perspective views illustrating the manufacturing method in the order of steps. 1 is a battery case, 2 is a battery case joint surface, 3 is a lid, 4 is a lid joint surface, 5 is a battery case partition, 6
is a battery case notch provided in the battery case partition 5, 7 is a pole group, and the anode/cathode plate groups 8 and 9 of the pole group 7 are connected to the anode of the adjacent pole group 7 through the battery case partition 5. - Connected to the other electrode plate of the cathode plate groups 8 and 9 by an inverted U-shaped connection conductor 10. The connecting conductor 10 consists of a connecting part 11 that connects between the anode plate groups 8 or the cathode plate groups 9 of the electrode group 7, and a connecting conductor head 12 that connects the connecting parts 11 and rises from the connecting part 11, A slit 13 is provided below the head 12. The connecting conductor 10 is in close contact with the notch 6 at the upper end of the slit 13 and the side surface of the connecting conductor head 12 extending upward from the slit 13 so that the container partition wall 5 around the notch 6 is buried therein.
A recessed band 14 is formed on the upper surface of the connecting conductor head 12 and is connected to the container partition wall 5. In the recessed band 14, the joining surfaces 2 and 4 of the lid 3 and the container 1 are heat-fused. At the time of joining, the molten thermoplastic synthetic resin of the lid joining surface 4 is press-fitted, thereby ensuring the liquid tightness of this part.

Next, the manufacturing process will be sequentially explained.

First, as shown in Fig. 3, connect the conductor 10 to the battery case 1.
The pole group 7 is inserted while aligning the slit 13 and the notch 6 of the battery case partition 5.

Next, as shown in FIG. 4, the connecting conductor head 12 is positioned above it, and a press-fitting jig 16 equipped with an air cylinder 15 is used to form a convex portion at the tip of the press-fitting jig 16 in the same direction as the battery case partition wall 5. Press so that the band 17 is in contact with the connecting conductor head 12, and while forming the concave band 14, press the head 12 into the notch 6 until it is about 1 to 2 mm below the upper end of the battery case partition wall 5. do. At this time, the connecting conductor head 12, which is approximately 3 to 4 mm wider than the width of the notch 6 and made of a material with lower hardness than the battery case material, is cut along the side surface of the notch 6, and the head 12 is cut along the side surface of the notch 6. The bottom of the notch 6 bites into the upper end of the slit 13. As described above, the connection conductor 10 comes into close contact with the container partition wall 5 at the notch 6 thereof.

Next, as shown in FIG. 5, the lid joining surface 4 and the battery case joining surface 2 are thermally melted and pressed together, and then cooled to join the lid 3 to the battery case 1. At this time, the melted thermoplastic synthetic resin of the lid joint surface 4 located on the head 12 of the connection conductor 10 is transferred to the head 12 of the connection conductor 10.
As a result, the lid joining surface 4 is brought into close contact with the connecting conductor head 12, thereby forming a liquid-tight space between the cells.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various embodiments can be considered without departing from the spirit thereof. For example, in the above embodiment, the connection conductor 10 between cells
The connecting conductor has an inverted U shape, but a band-shaped connecting conductor without a rising portion may also be used. Further, the present invention can also be applied to a structure in which a group of electrodes divided into cells is housed in a battery case and then welded to form a connecting conductor. On the other hand, as a method of press-fitting the connecting conductor into the notch of the battery case partition wall and bringing it into close contact with each other, in addition to the above-mentioned example, there is a method in which the upper surface of the connecting conductor is pressurized to a certain degree and
Press-fitting can also be performed using 15KHz ultrasonic vibration. In addition to the above-mentioned embodiments, as a method of bringing a part of the lid joint surface located on the connection conductor into close contact with the connection conductor, the tip of the lid joint surface located on the connection conductor is formed at an acute angle. Forming a protrusion, removing the protrusion, melting the lid joint surface with a hot plate, and using the pressure to press the protrusion into the connecting conductor and embedding it when the lid and the battery case are pressed together. Can be done. Furthermore, by forming the notch and the portion of the connecting conductor that engages with the notch in a V-shape or trapezoid shape, it is possible to improve the close contact between the notch and the connecting body.

Effects of the Invention As mentioned above, the present invention is easy to work with,
It is possible to provide a method for manufacturing lead-acid batteries that does not require a large capital investment, is not limited by battery dimensions, and has extremely reliable cell-to-cell connections that are liquid-tight between the cells. The value is extremely high.

[Brief explanation of the drawing]

FIG. 1 is a partially front sectional view showing one embodiment of the present invention. FIGS. 2 to 5 are partial perspective views showing, in order of steps, an embodiment of a method for manufacturing a lead-acid battery obtained according to the present invention. 1...Battery container, 2...Battery container joint surface, 3...Lid, 4
... Lid joint surface, 5 ... Battery case partition, 6 ... Battery case notch, 7 ... Pole group, 8 ... Anode plate group, 9 ... Cathode plate group, 10 ... Connection conductor, 11 ... Connection part, 12...
... Connecting conductor head, 13... Slit, 14... Concave band, 15... Air cylinder, 16... Press-fitting jig, 17... Convex band.

Claims (1)

[Claims] 1. Connection conductor 1 connecting positive and negative plate groups 8 and 9
0, a battery case 1 having a battery case partition 5 provided with a notch 6 for a connecting conductor 10, the battery case 1 housing positive and cathode plate groups 8 and 9, and a partition wall corresponding to the battery case partition 5; A step of preparing a lid 3 having a joint surface 4 and arranging a connecting conductor 10 in the battery case notch 6;
Next, the connection conductor head 12 is held down by the press-fitting jig 16, and the connection conductor 10 is press-fitted into the battery case notch 6.
4 and bringing the connecting conductor 10 into close contact with the battery case notch 6. Next, the process of thermally melting the joint surface 2 of the lid 3 and the battery case 1. Next, the lid joint surface 4 is A method for manufacturing a lead-acid battery, comprising the step of press-fitting and joining into a recessed band 14 of a battery case partition 5 and a connecting conductor head 12.