JPH0410704B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to the parallel connection of the ears of the same polar plates in the same cell chamber of a group of electrode plates housed in each cell chamber of a battery case, and the connection of the battery case partition walls. The present invention relates to a lead-acid battery that can easily and lightweight connect plates of different polarity in adjacent cell chambers in series, and a method for manufacturing the same.

Conventional structure and its problems A group of electrode plates is housed in each cell chamber of a monoblock battery case in which a plurality of cell chambers are integrated with a partition wall. Many methods have been proposed so far for achieving parallel connections between ears and series connections with groups of different polarity plates in adjacent cell chambers via partition walls.

For example, as shown in Figure 1, a monoblock battery case 1
A group of electrode plates 4 is stored in each cell chamber with a through hole 3 for connection between cells in the partition wall 2 of the cell, and the battery case into which the group of electrode plates is inserted is turned over so that the opening faces downward. Then, a strap forming mold 6 is formed into which the ear portion 5 of the positive electrode plate in one of the cell chambers is inserted.
A strap-forming mold 8 into which the ear 7 of the negative electrode plate in the adjacent cell chamber is inserted is brought into close contact with the lower side of the through hole 3 of the partition wall 2 (Fig. 2), and molten lead is poured into the mold through the conduit 9. 6 and 8 and heated the mold by a heating high-frequency coil 10 placed under each mold, the molten lead is heated and the tips of the ears 5 and 7 are melted to form the through hole 3. The left and right sides should be connected at a certain point. Next, the coil 10 is de-energized and the molten lead is cooled and solidified, thereby connecting the strap 11 that connects the ears 5 of the positive electrode plate of one cell chamber in parallel, and the ears 7 of the negative electrode plate of the other cell chamber. A strap 12 is formed to connect the two straps 11 and 12, and both straps 11 and 12 are connected at the through hole 3 portion of the partition wall 2 (FIG. 3).

However, in such a configuration, the straps 11 and 12 that connect the electrode plate group ears are made of lead or lead alloy, which increases the weight and requires the straps to pass through the partition wall between adjacent cells. Since the batteries are connected in series, 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.

Purpose of the Invention The present invention solves the conventional problems as described above, simplifies the manufacturing process, facilitates productivity improvement such as automation, and provides a novel configuration of a lead-acid battery that can be manufactured at low cost. It provides a manufacturing method.

Structure of the Invention In order to achieve the above-mentioned object, the present invention includes soldering the tip end of the ear of the electrode plate group protruding above the cell chamber opening of the battery case to a connecting metal plate. Therefore, the ears of the polar plates of the same polarity in the same cell chamber are connected in parallel, and a group of polar plates of different polarity in adjacent cell chambers are connected in series through the cell partition wall.

The present invention also provides a method in which a connecting metal plate matched to the tip size of the electrode group lug is supplied in advance together with a brazing material such as solder to a holder having a heating source such as a high-frequency heating coil.
180° with the electrode plate group stored in each cell chamber of the battery case.
Place the electrode plate facing downward on the holding part, and solder the tip of the ear part of the electrode plate to the connecting metal plate using solder melted by a heating source to connect the ears of the electrode plates of the same polarity in the electrode plate group. This feature is characterized in that the cells are connected in parallel with each other and the cells are connected in series with groups of different polarity plates in adjacent cell chambers via a partition wall.

Then, assembly of the battery is completed by assembling the terminals and adhering the cover with adhesive. According to this method, the manufacturing process is simplified compared to conventional methods,
This not only reduces man-hours, but also allows batteries 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 1 is placed in each cell chamber of a monoblock battery case 1 made of synthetic resin.
3. Insert the electrode plate group 4 consisting of the separator 14 and the negative electrode plate 15, rotate it 180 degrees as shown in the figure, hold the electrode plate ear part downward, and place the electrode plate group 4 below it as shown in Figs. 4 and 6. The holding portions 16 of the connecting metal plates provided with the high-frequency heating coils 10 are opposed to each other. Shallow recesses 17 and 17' are provided on the upper surface of the holding portion 16.

This holding portion 16 is preferably made of a non-metallic or heat-resistant material such as ceramic. Recessed portion 17, 1 on the upper surface of the holding portion 16
Connecting metal plates 18, 18' made of iron whose surfaces are coated with solder are supplied to 7', and solder plates 19, 19' are placed thereon as brazing material to connect the downward facing ears 5 of the electrode plate group. , 7 to this solder plate 19,
The high frequency heating coil 10 is pressed against the
energize. Connecting metal plates 18, 18', solder plates 19, 19' as brazing materials, and electrode plate ears 5,
7 self-heats due to the magnetic field lines of the high-frequency heating coil, and the temperature rises, and the connecting metal plates 18, 18' and the tip of the edge of the electrode plate become melted solder 19, 19'.
are connected in a brazed state. If the high-frequency coil is turned off in this state, the solder will cool and solidify, and the ears of the polar plates of the same polarity will be connected in parallel with each other, and the cells adjacent to each other will be connected across the top of the partition wall 2, as shown in FIG. The series connection with the ears of the different polarity plate group is completed.

The energizing time or energizing current to the coil 10 is
Although it varies depending on the material and size of the connecting metal plate used, the composition of the solder 19, 19', the shape of the tip of the electrode plate ear, etc., a constant value can be easily found.

Figure 7 shows parallel connection of the ears of polar plates of the same polarity using connecting metal plates 18 and 18', and series connection with ears of a group of polar plates of different polarity in adjacent cell chambers across the partition wall. The connection between adjacent cells and the parallel connection of the ears of polar plates of the same polarity within the same cell room are made using a connecting metal plate and solder rather than lead or lead alloy, making it lightweight. It is possible to Furthermore, since the connecting metal plates are soldered to the ears of the polar plates of adjacent cells with different polarities while straddling the partition wall, the height of the electrode plates is not restricted when connecting, and it penetrates the partition wall. There is no need to use a material with excellent heat resistance for the partition wall, unlike when holes are made and filled with molten lead.

In addition to iron, any solderable material such as tin-plated iron, copper, or brass can be used as the connecting metal plate, and depending on the material, electromagnetic induction heating is also possible. . Furthermore, if the shape is shaped in advance into a shallow dish shape and the surface is coated with solder, it will also act as a pool to receive the melted connection solder, and the connection can be made reliably.

Moreover, if surface oxides are removed by flux treatment or the like prior to soldering the tip of the ear of the electrode plate corresponding to the connecting metal plate, soldering can be made more securely.

Effects of the Invention As described above, according to the present invention, in a lead-acid battery using a monoblock battery case, the ears of the polar plates of the same polarity in the same cell chamber are mutually connected above the opening of the cell chamber divided by the partition wall of the battery case. It is possible to easily connect in parallel with a group of electrode plates of different polarity in adjacent cell chambers via a partition wall, and the connection is not mainly made by melting and solidifying lead or lead alloy, but by using a connecting metal. Since it is soldered to the tip of the electrode tab of the plate, it has the advantage of reducing the weight of the battery and making it possible to automate the connection.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram when adjacent cells in a conventional lead-acid battery are connected using lead straps, Figure 2 is a cross-sectional view of the same side, Figure 3 is a cross-sectional view of a battery in which cells are connected using lead straps, Figure 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 Figure 5 is a side view when the connecting metal plate is soldered to the electrode plate ears. , FIG. 6 is a perspective view showing a connecting metal plate and a holding portion for welding solder, and FIG. 7 is a perspective view showing the storage battery in an upright position with connection completed by the connecting metal plate. 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, 10 ... High frequency heating coil, 16 ... Holding part, 17, 17'... Recessed part, 18, 18'... Connecting metal plate, 19, 19'...solder.

Claims (1)

[Claims] 1. A battery case 1, a plate group 4, a connecting metal plate 18,
18', the battery case 1 has a partition wall 2, the electrode plate group 4 is housed in each cell chamber divided by the partition wall 2 of the battery case 1, and the ear part of the electrode plate 5,7
The leading end of the connecting metal plate 18, 18' is positioned so as to protrude above the opening of the battery case 1, and the connecting metal plates 18, 18' are connected to the same polarity polarity in the same cell chamber with respect to the ear of the electrode plate group in the adjacent cell chamber. A lead-acid battery is soldered in parallel with the ears of a plate and in series with the ears of a different polarity plate in the adjacent cell chamber. 2. The lead-acid battery according to claim 1, wherein the connecting metal plates 18, 18' are made of a solderable material, and the surfaces thereof are coated with solder. 3 The electrode plate group 4 is housed in each cell chamber divided by the partition wall 2 of the battery case 1, and the tips of the electrode plate ears 5 and 7 are positioned so as to protrude above the opening of the battery case 1. With this electrode plate group 4 facing downward, the tips of the electrode plate ears 5 and 7 are brought into contact with the solders 19 and 19' on the connecting metal plates 18 and 18'. , 18' and the solder 19, 19' in the same cell room by melting the solder 19, 19' by applying heat to the high-frequency coil 10, etc. located so as to surround the periphery of the solder 19, 19'. A method for manufacturing a lead-acid battery, characterized by soldering in parallel with the ears of a polar plate and in series with the ears of a different polarity plate in an adjacent cell chamber.