JPH0542111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to soldering the tips of the ears of the electrode plate group inserted into each cell chamber of a battery case that protrude outside the battery case. The present invention relates to a lead-acid battery in which parallel connection of polar plates of the same polarity indoors and series connection of polar plates of different polarity in adjacent cell chambers via a battery case partition wall are achieved easily and at low cost.

Conventional configuration and its problems A group of electrode plates is inserted into each cell chamber of a monoblock battery case in which a plurality of cell chambers are integrated, and the ears of the same polarity plates of the group of electrode plates in the same cell chamber are connected to each other and the partition wall. A number of methods have been proposed to achieve series connection of polar plates of different polarity in adjacent cell chambers.

For example, as shown in FIGS. 1 and 2, a group of electrode plates 4 is inserted into each cell chamber in which a through hole 3 for connection between cells is made in the partition wall 2 of a monoblock battery case 1.
The battery case into which this electrode plate group has been inserted is turned over so that its opening faces downward, and a strap forming mold 6 is formed into which the ear part 5 of the positive electrode plate in one cell chamber enters, and the adjacent cell Ear part 7 of chamber negative electrode plate
A partition wall 2 separates the strap forming mold 8 into which the strap is inserted.
The molten lead is supplied into the molds 6 and 8 through the conduit 9, and the molds are heated by the high-frequency heating coil 10 disposed under each mold. While heating, the tips of the ears 5 and 7 are melted so that the left and right sides are connected at the through hole 3 portion. Next, the coil 10 is de-energized and the molten lead is cooled and solidified, thereby connecting the strap connecting the ears 5 of the positive electrode plate of one cell chamber to the ears 7 of the negative electrode plate of the other cell chamber. A strap is formed, and both straps are connected at the through hole 3 portion of the partition wall 2. However, with this configuration, adjacent cells are connected in series using straps that pass through the partition wall, so there is a problem in that it is not possible to easily downsize the storage battery due to restrictions on the height of the electrode plates. It was hot. In addition, a method has been devised in which the electrode plates are connected to each other by using a connecting metal plate at the tip of the ear of the electrode plate group as shown in Fig. 3, but in this method, the electrode plate ear However, there was a problem in that it was not possible to check the bonding state with the metal plate. Therefore, the inspection method was to conduct a continuity test using a tester or the like and measure the resistance.

However, even the slightest contact between the ear and the metal plate resulted in a value of 0Ω, and a poor connection condition known as "potato solder" could not be determined by the continuity test. Furthermore, in the case of visual inspection, the battery case and metal plate were in close contact with each other, making it impossible to conduct a sufficient visual inspection.

Purpose of the invention The present invention solves the conventional problems as described above,
The present invention provides a method for manufacturing a lead-acid battery that simplifies the manufacturing process, facilitates productivity improvements such as automation, enables inexpensive manufacturing, and allows the battery to be made smaller and lighter.

Composition of the Invention In order to achieve the above-mentioned object, the present invention has the tip of the ear part of the electrode plate group protruding outside the battery case pressed against the solder and heated and melted by high frequency to polarize the same polarity in the same cell chamber. It is characterized by the parallel connection of the plates and the series connection of the plates of different polarity in adjacent cell chambers via the cell partition wall.

The present invention also provides a method in which the electrode plate group ears are supplied in advance to a connection jig section having a heating source such as a heating coil, and the electrode plate group is inserted into each cell chamber of the battery case and turned 180 degrees. Place the plates facing downward on the jig and heat them with high frequency to join the tips of the tabs with molten solder to connect the plates of the same polarity in the group and connect adjacent cells via the partition wall. This feature is characterized in that the series connection between the two is performed at the same time. Then, assembly of the battery is completed by assembling the terminals and adhering the cover with adhesive. This method not only simplifies the manufacturing process and reduces the number of man-hours, but also allows the battery to be made smaller and lighter.

DESCRIPTION OF EMBODIMENTS The details of the present invention will be explained below with reference to embodiments shown in the drawings. First, as shown in FIG. 4, a positive electrode plate group and a negative electrode plate group are respectively inserted into each cell chamber of a monoblock battery case 1 made of synthetic resin, and then the positive electrode plate group and the negative electrode plate group are inserted 180° as shown in the figure.
The plate ears 5 and 7 are inverted and held downward, and a connection jig 12 equipped with a high-frequency heating coil 11 as shown in FIGS. 4 and 6 is placed opposite to the lower part thereof.
The upper surface of the jig 12 is provided with shallow recesses 13 and 13'. This connection jig 12 is desirably made of a non-metal such as ceramic or a heat-resistant material. Solder 14, 14' is supplied to the recesses 13, 13' on the upper surface of the jig 12, and the tip portions 5, 7 of the tabs of the electrode plate group inserted into the battery case are soldered 14, 14'.
4', the magnetic field lines of the high-frequency heating coil 11 generate self-heating, the temperature rises, and the solder is soldered to the tip of the ear part of the pole plate by the melted solder 14, 14'.

If the power supply to the high-frequency heating coil 11 is stopped in this state, the solder will cool and solidify, and as shown in FIG. The series connection between the ears of the different polarity plates of the cell is completed. The time to energize the coil or the energizing current depends on the solder 1 used.
Although it varies depending on the composition of 4, 14' and the shape of the tip of the electrode plate ear, a constant value can be easily found.

Figure 7 is a perspective view when standing upright showing the parallel connection between the ears of the same polarity plates after soldering and the series connection between the ears of different polarity plates between adjacent cells across the partition wall. FIG. 3 shows excellent corrosion resistance because the connections between cells and the connections between the ears of polar plates of the same polarity in the same cell are made of lead or a lead alloy. Furthermore, since high-frequency heating is performed with the electrode plate ears pressed against the solder, only the solder and the electrode plate ears generate heat and melt, leaving the synthetic resin battery case unaffected by the heat. It is possible to weld the tip of the battery case and the weld between the opening of the battery case and the edge of the electrode plate at a distance of 2 to 3 mm, making it possible to reduce the size and weight of the battery. Furthermore, since the electrodes are soldered between the ears of adjacent cells while straddling the partition wall, the height of the electrode plates is not restricted during connection, and a through hole is drilled in the partition wall and molten lead is filled in. There is no need to use a material with excellent heat resistance for the partition walls, unlike in the case of

Effects of the Invention As described above, according to the present invention, in a lead-acid battery using a monoblock battery case, pole plates of the same polarity are connected in parallel with each other in the same cell chamber outside the battery case, and adjacent cells are connected through the battery case partition wall. It is easy to connect plates of different polarity in series, and since the connection is mainly made by melting and solidifying lead or lead alloy,
Compared to the method of soldering a connecting metal plate to the tip of an electrode plate ear, this method requires fewer parts, reduces costs, and makes it possible to make the battery smaller and lighter.

Further, it is excellent against corrosion inside the battery, and has the advantage that visual inspection after soldering can be easily performed.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of connecting adjacent cells with lead straps in a conventional lead-acid battery, Figure 2 is a sectional view of the same side, and Figure 3 is a battery in which cells are connected using a metal plate for connection. FIG. 4 is an explanatory diagram when connecting the electrode plate ears in adjacent cell chambers of a lead-acid battery according to an embodiment of the present invention, and FIG. 5 is a side view when the electrode plate ears are soldered. FIG. 6 is a perspective view showing a jig holding solder for welding, and FIG. 7 is a perspective view showing the storage battery in an erect state after completion of inter-cell retention by soldering. 1... Monoblock battery case, 2... Partition wall, 4...
... Electrode plate group, 5 ... Ear part of positive electrode plate, 7 ... Ear part of negative electrode plate, 11 ... High frequency heating coil, 12 ... Connection jig holding solder, 13, 13' ... Recessed part,
14,14'...Solder.

Claims (1)

[Scope of Claims] 1. A battery case having a plurality of cell chambers and a cover covering an opening thereof, each cell chamber of the battery case having a group of electrode plates including positive and negative electrode plates. The positive and negative electrode plates each have upwardly protruding ears 5 and 7, and when the battery case is reversed and the ears 5 and 7 of the electrode plates face downward, the ears 5 and 7 are removed. is pressed against the solder 14, 14' placed in advance in the connection jig 12, and is heated and melted by high frequency to connect the ears of the same polarity plates in the same cell chamber in parallel, and at the same time connect the ears of the same polarity plates in the adjacent cell chamber. A method of manufacturing lead-acid batteries in which the ears of polar plates of different polarities are connected in series, and then the cover is fixed to the opening of the battery case with adhesive.