JPS6017788Y2 - Storage battery terminal - Google Patents

Description

[Detailed Description of the Invention] This proposal relates to an improved terminal for a storage battery that can prevent dilute sulfuric acid leaking from a storage battery from seeping up and protect the contact portion from being infiltrated with dilute sulfuric acid.

In order to conduct electricity from a storage battery to various electrical devices, it is common practice to attach a terminal fixed to the end of a wire to the electrode pole of the battery, but even if the contact part of the terminal is tightly attached to the electrode pole, fine It is inevitable that a gap exists in the contact area, and when battery fluid leaked from the storage battery, that is, dilute sulfuric acid, reaches the electrode column, this dilute sulfuric acid will form a capillary in the gap formed between the contact area and the electrode column. The problem has been that terminals made of copper and copper alloys in particular are attacked by dilute sulfuric acid and corroded, causing major electrical and mechanical problems.

In order to eliminate such inconveniences, lead die-cast terminals are generally used, but these have the drawbacks of high cost, large size, and high weight.

In view of the current situation, the present invention was developed in order to provide an electrical terminal with high acid resistance, which has been a pending issue, and in particular, the hem of the contact part is designed to have a wide hem shape that makes it difficult for capillary phenomena to occur. In addition, the contact area, which has many opportunities to come into contact with dilute sulfuric acid, is covered with an acid-resistant resin layer, and furthermore,
The resin layer is characterized in that grooves are provided at appropriate locations to cut off seepage of dilute sulfuric acid due to capillary action.

Hereinafter, the present invention will be described in detail based on one embodiment of the accompanying drawings.

The terminal body shown in Fig. 1 has a contact part 1 in the center for fitting into the lead electrode pillar 4, a tightening part 2 for tightening the contact part 1 on both sides, and a conductor. It has a conductor connection part 3 for connection, and is made of a single metal strip, such as a brass strip, and is integrally formed by pressing and bending it into a U-shape from the center. be done.

The contact portion 1 includes a pair of tapered portions (I
a) and (lb) are arranged facing each other, and a truncated cone-shaped fitting part is formed that fits the truncated cone-shaped electrode column 4.

As shown in the figure, the hem portions of these tapered portions (la) and (lb) are formed into a widening skirt portion 5 so as to maintain a gap with the opposing surface of the electrode column 4. The skirt portion 5 has tapered portions (Ia) and (l
b) Continuous over the entire length of the lower edge.

It may be in the shape of a flange, or it may be formed in the shape of a washer with counter-shape teeth divided vertically into several parts with a plurality of cuts 6 extending toward the ancestor as shown in the figure. .

A resin layer 7 is formed on the surface of a portion of the terminal including this contact portion 1.
are densely layered, but the resin layer 7 has high acid resistance,
A material having appropriate elasticity is preferable, and a preferable example is vinyl chloride resin.

Then, this resin layer 7 is layered in close contact with at least the inner surface of the skirt portion 5, excluding the surface of the contact portion 1 that directly contacts the electrode pillar 4, but not only on the contact portion 1 but also on the inner surface of the skirt portion 5. Of course, the tightening may also be applied to the surface of the portion 2 in a layered manner.

Therefore, the resin layer 7 is made thicker in the portion that comes into close contact with the inner surface of the skirt portion 5 than in other portions so that the gap between the resin layer 7 and the electrode pillar 4 can be filled when the resin layer 7 is fitted. .

Furthermore, in this thick portion, on the surface in contact with the electrode column 4,
One groove 1 or two or more parallel grooves 1 that can extend along the circumferential direction of the nuclear electrode column 4 are provided.

As an example of a suitable method for layering the resin layer 7 provided in the form of The diameter of the part corresponding to the groove 8 is small, and the diameter of the part corresponding to the groove 8 is small.
Forms a male-female relationship with: Contact part 1 for the model with protrusions
For the tightening, insert the screw into the hole 9 of part 2 and tighten it in the same manner as in the actual usage condition.
The contact portion 1 is placed in a resin bath containing the stock solution of the resin layer 7.
The portion 2 is crushed by tightening, and then taken out from the resin bath and cured by heat treatment, thereby forming the resin layer 7 in the desired form.

When the model is removed, the brass skin is exposed on the surface that comes into direct contact with the electrode column 4, and the contact surface that does not cause any electrical or mechanical problems can be used to connect the shaped terminal. Obtainable.

The terminal having the structure described above, when attached to the electrode pole 4 of a storage battery, can be used even if there is leaked dilute sulfuric acid near the electrode pole 4 or if sulfuric acid mist is present in the atmosphere. Since the resin layer 7 covers the metal body, it is natural that this metal part will not be corroded and the life of the terminal will be extended.

Further, since the resin layer 7 is filled between the skirt portion 5 and the electrode column 4, there is almost no leakage of dilute sulfuric acid.

Even if seepage occurs along the circumferential surface of the electrode column 4 due to capillary action, the grooves 8 are formed in the resin layer 7 that is in close contact with the electrode column 4. Capillary action is cut off by the space (air layer), so that it does not seep above the grooves 8, and thus the seepage prevention function is more reliably exerted.

In this case, it goes without saying that having two or more articles is more effective than having one article.

If the skirt portion 5 is formed in the shape of a toothed washer as shown in the figure, the thick wall layer formed on the inner surface of the skirt portion 5 is caused by the close contact between the contact portion 1 and the electrode column 4. Even if the resin layer 7a (see FIG. 2) is compressed and deformed, the deformation is absorbed through the cut 6, so there is no problem such as the groove 8 being crushed. This is extremely effective in maintaining the stability of the seepage prevention function.

As described above, in this plan, the skirt portion of the contact portion 1 of the storage battery terminal is formed into the skirt portion 5, and the resin layer 7 is overlaid on the portion that is likely to come into contact with leakage from the storage battery.
The metal surface of the terminal does not come into direct contact with dilute sulfuric acid (leakage), and therefore can be reliably protected from corrosion.

Furthermore, since the grooves 8 are recessed in the resin layer provided between the skirt portion 5 and the electrode column 4, even if dilute sulfuric acid flows along the circumferential surface of the electrode column 4 and oozes out due to capillary action. Even if the dilute sulfuric acid rises up, it is cut off by the groove 8, and the dilute sulfuric acid will not rise above this point, and the seepage prevention function will be more effective, extending the life of the terminal and improving its performance. It has the advantage of being able to further maintain the stability of
It is now possible to reliably prevent corrosion caused by dilute sulfuric acid, which has been a problem in the past, and it has great practical value.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted perspective view of one example of the terminal of the present invention, and FIG. 2 is a sectional view of the contact portion in FIG. 1. 1...Contact part, 2...Tightening part, 3.
...Conductor connection part, 4...Electrode column, 5...
... Skirt part, 6 ... Cut, 7 ...
...resin layer.

Claims (1)

[Claims for Utility Model Registration] 1. A skirt portion of the contact portion 1 for fitting into the electrode pillar 4 of a storage battery that has a wide hem such that a gap is maintained between it and the circumferential surface of the electrode pillar 4. 5, a resin layer 7 is superimposed on at least the inner surface of the skirt portion 5, other than the surface of the contact portion 1 that is in direct contact with the electrode pillar 4, and the resin layer The part of skirt part 5 of 7 that is in close contact with the inner surface of 1 is made thick enough to fill the gap with the electrode pillar 4, and the part that is in contact with the electrode pillar 4 is extended along the circumferential direction of the electrode pillar 4. A storage battery terminal characterized in that one groove 8 or two or more parallel grooves 8 are provided. 2. The terminal for a storage battery according to claim 1, wherein the widening skirt portion 5 is formed in the shape of a washer with counter-shape teeth divided into several parts by a plurality of cuts 6 extending toward the front.