JPH0245303B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manufacturing method suitable for special batteries such as large-sized batteries.

For large cylindrical batteries, etc., there are various standards for dimensions, shapes, etc. depending on the use, but since these batteries have very specific specifications, they are different from mass-produced batteries. Since batteries have to be manufactured in various sizes to meet specifications, and high-mix, low-volume production is inevitable, the cost per battery has become extremely high.

On the other hand, it has been considered to collect multiple mass-produced single cells and create voltage and capacity ratings that match the special specifications such as those mentioned above, but in this case, in addition to the above ratings, The external shape standard is also an important element, so if you try to make a battery that conforms to the above special purpose battery by packing these into a container that meets the standard, the assembly and fixing will be troublesome and expensive. becomes.

The present invention has been made in view of the above background, and an object thereof is to obtain a special battery having a desired voltage, capacity rating, and external shape specifications by a simple manufacturing method.

In order to achieve the above objectives, the method of the present invention includes:
The bottomed container main body and the lid are integrally connected and molded by plastic blow molding, and the hollow molded body is separated from the container main body and the lid at the connecting part, and the above-mentioned A terminal section is attached to the lid, while an assembly of a plurality of single cells is housed in the container main body to have a predetermined voltage and capacity rating, and the assembly is attached to the terminal section provided on the lid. The container main body and the lid are then fitted and fixed together.

Hereinafter, the present invention will be explained in detail in accordance with the manufacturing order using the drawings.

FIG. 1 shows an internally hollow molded body that conforms to a predetermined external shape standard. It consists of a lid part 14 that is integrally formed to cover the upper surface of the main body part 10 via a ring-shaped connecting part 12, and a blower hole 16 is formed in the center of this lid part 14.

As shown in FIG. 2, the upper part of the container body 10 is formed with a fitting margin 10A having a diameter slightly smaller than that of the main body 10, and the outer diameter of the fitting margin 10A is the same as that of the lid. The connecting portion 12 is set to be equal to or slightly smaller than the inner diameter of the connecting portion 14, and furthermore, the thickness of the connecting portion 12 is thinner than other portions, making it easy to remove this portion.

As shown in FIG. 3 of the container configured as described above, the connecting portion 12 is removed and trimmed, and the container body 10 and the lid 14 are separated, and the lid 14 is removed from the blower hole 16. Molding and drilling of terminal insertion holes 18, 18 are performed.

As shown in FIG.
0 is attached to each terminal, and lead wires 24, 24 derived from the positive and negative terminals of the cell assembly 22 are connected to the protruding ends of the rear surface thereof, and labels 26, 26 indicating the polarity are attached to each terminal portion. Approximately 20 parts are pasted at this stage.

Note that instead of a label, a mark may be formed in relief during blow molding.

The assembly 22 is a tray 2 that also serves as a connection terminal section.
A plurality of single cells 30, 30, .

This assembly 22 is housed in the container main body 10 in an integrated state.

In this embodiment, the upper and lower unit cells 30 are connected in parallel, and the upper and lower cells are connected in series, which is a so-called series-parallel connection.

However, it goes without saying that they may be connected in series or in parallel depending on the voltage and capacity rating of the battery to be obtained.

Next, the container body 10 is filled with a filler 32 such as molten wax or a foaming resin liquid (see FIG. 5), and an adhesive 34 is applied to the outer periphery of the fitting margin 10A, and the lid is closed. 14, it will be integrated with the container body 10 again via the adhesive 34, completing a cylindrical battery as shown in FIG. Further, the reference numeral 36 indicates a plug for the blower hole 16.

In addition, when the filler 32 is wax,
The filling operation is performed with the lead wire 24 of the assembly 22 taken out from the container body 10, and then the lid 14 is
It is desirable to connect the wires to the terminal portion 20 of the foam resin.
It is desirable that the lid portion 14 be fitted and fixed before the foaming starts.

Further, the battery assembly 22 and the container main body 10
If the gap is small and there is no risk of movement, these fillers are not necessarily necessary.

Further, in the above embodiment, the fitting portion between the lid portion 14 and the container body portion 10 is formed into a straight shape, but if, for example, a protrusion is formed on one side and a guide groove is formed on the other side, the assembly can be further simplified. becomes.

As explained above in the examples, in the method of the present invention, the lid part and the container body part are integrally formed by blow molding, and then they are separated, and
Since the unit cell assembly is housed and the terminal part is made to protrude above the lid part, the lid part is fitted and fixed to the container body again, so that special use batteries can be replaced with mass-produced batteries. When constructed from a battery assembly, the container itself can be provided at a very low cost according to the dimensional standards, and the assembly work can be easily performed, so it is inexpensive and does not require any special equipment.
A battery having desired voltage, capacity rating, and external shape specifications can be easily provided.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of the container after blow molding, FIG. 2 is an enlarged sectional view of circle A in FIG. FIG. 4 is an exploded perspective view showing the assembled state of the cell assembly, and FIG. 5 is a partially cutaway perspective view showing the completed battery assembly. 10... Container body, 10A... Fitting margin, 12... Connecting portion, 14... Lid, 16... Blower hole, 18, 18... Terminal insertion hole, 20, 20
... Terminal section, 22 ... Cell assembly, 24, 24
... Lead wire, 26, 26 ... Label, 28 ...
Tray, 30... Cell, 32... Filler, 34
...Adhesive, 36...Plug.

Claims (1)

[Claims] 1 The bottomed container body and lid are integrally connected and molded using a plastic blow molding method,
The container main body and the lid of the molded internally hollow molded body are separated at the connection part, and a terminal part is attached to the lid. The container body is characterized by containing an assembly of single cells, electrically connecting the assembly to a terminal provided on the lid, and then fitting and fixing the container body and the lid. A method for manufacturing a battery.