JPS5812370Y2 - storage battery - Google Patents

Description

[Detailed description of the invention] The present invention relates to a storage battery suitable for high-mix, low-volume production.The purpose of this invention is to create one type of lid for storage batteries that are produced in small quantities, and to To provide an inexpensive storage battery by manufacturing various types of lids by appropriately cutting out parts and omitting the manufacturing of a mold exclusively for the lids.

Conventionally, storage battery lids have been manufactured for each type of battery case, and only the type of lid is required for the type of battery case.

For this reason, conventionally there were as many molds for the lid as there were molds for the battery case, and the cost of these molds was included in the cost of the storage battery and amortized, making the cost of the storage battery expensive. Ta.

Depreciation costs are particularly low for storage batteries that are produced in large quantities, but for storage batteries that are produced in small quantities, this cost is quite high.

For example, the mold cost for the lid of a single-cell lead-acid battery with a 5-hour rate of 300 Ah is approximately 1.5 million yen, but if we assume that this will be amortized over two years and that only 100 units are produced per year, the cost of the storage battery This depreciation cost per item is 7500
It becomes a yen.

This cost is comparable to the total cost of the storage battery, and the cost of molding the lid was a major cause of increasing the cost of the storage battery.

The present invention provides an inexpensive storage battery that eliminates the above-mentioned conventional drawbacks, and the present invention will be described below with reference to drawings showing embodiments thereof.

In Figures 1 to 4, reference numeral 1 denotes the original shape of the lid, which is made of thermoplastic synthetic resin, such as PE resin, PP resin, or a copolymer resin of both. It is molded to a size similar to the length in the thickness direction.

Reference numeral 2 designates welding protrusions provided in multiple stages on the welding surface of the original form 1 of the iron lid to the battery case, and the respective dimensions with both ends cut off by the same amount are shown as L 1 *L 2 +L3.

That is, by cutting off the end portions at respective positions, it is possible to obtain a plurality of types of lids having different length dimensions.

Furthermore, 3 is a liquid port plug attachment part, and 4 is a pole through-hole.

Now, as shown in Figure 4, the length dimension of the battery case 5 is L of the original shape of the lid.
2, both ends of the original shape 1 of the lid are cut off to obtain a lid 1a having a length L2, and this is welded to the battery case 5.

Further, 6 is an electrode plate group consisting of anode and cathode plates, 7 is a separator made of microporous ebonite, etc., 8 is an electrolytic solution made of dilute sulfuric acid,
9 is a pole, and 10 is a liquid port plug.

The remaining welding projections 2 serve to reinforce the lid 1a.

Although only one embodiment of the present invention has been described above, the present invention is not limited to this, and may be applied within the scope of the invention, such as cutting off the end after welding the original shape of the lid to the battery case. Various embodiments are possible.

As described above, in the present invention, many types of lids can be made from the original shape of the lid, so the depreciation cost for the original shape can be reduced.

Therefore, the price of storage batteries is low, and it is suitable for obtaining lids for storage batteries produced in small quantities, and its practical value is great.

[Brief explanation of drawings]

Figures 1 to 3 are a front sectional view, bottom view, and side sectional view of the original shape of the lid in one embodiment of the present invention, and Figure 4 is the original shape of the lid shown in Figures 1 to 3. FIG. 2 is a front sectional view of an embodiment of the present invention. 1... Original shape of the lid, protrusion, 5... Battery case. 1a... Lid, 2... Scheduled to be welded

Claims (1)

[Scope of utility model registration request] A lid whose dimensions are adapted to the battery case by cutting off the unnecessary end of the original shape of the lid, which has multiple stages of protrusions to be welded on the surface to be welded to the battery case, so that the protrusions to be welded remain at the end. A storage battery that is welded to a battery case.