JPS5928024B2 - Connection method between adjacent storage batteries - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for connecting adjacent storage batteries in a storage battery device using a plurality of storage batteries as a set.

As a connection structure for a storage battery device, for example, Utility Model Application Publication No. 51-8292 is proposed as one that eliminates the drawbacks of the conventional structure using bolts and nuts and the structure using solder joints.
As described in Publication No. 6, the entire surface of the connecting surface between the terminals of adjacent storage batteries, or the entire surface of the connecting surface between the connecting conductor and the terminal that connects the terminals of adjacent storage batteries, is coated with a corrosion-resistant, low-melting point material with a melting point of 40°C to 180°C. A structure in which they are joined using an alloy has been proposed.

That is, the entire connection surface of the connection part between the terminals of adjacent storage batteries is covered with, for example, a Pb-Sn-Bi ternary eutectic alloy or a Pb-Sn-Bi ternary eutectic alloy.
This method uses a corrosion-resistant, low-melting-point alloy made of a Sn-Bi-Cd quaternary eutectic alloy to melt and join, and eliminates the acid fog and alkali fog generated from storage batteries, which was a drawback of the connection structure that was tightened with bolts and nuts. It is intended to improve the corrosion of connections caused by the process, as well as poor conductivity and voltage drop caused by poor connections caused by simply tightening bolts and nuts. This is an extremely excellent connection structure that improves the occurrence of poor airtightness at the tank lid penetration part and the complexity of joining work.
Furthermore, as a method of forming such a connection structure, a method has also been proposed in which a foil-like material is used as a low melting point alloy.

This method involves inserting a low-melting point alloy foil into the joints of adjacent storage batteries and melting and joining them.The low-melting point alloy diffuses uniformly over the entire joint surface of the joints, so for example, This is an extremely excellent connection method that improves bonding defects such as partial bonding due to heat absorption of the bonded body, or incomplete bonding due to uneven penetration of the bonded surface, which were disadvantages of the bonding method in which a melting point alloy is poured into the bonded area. be. However, although the wall thickness of low melting point alloy foil is practically sufficient for bonding with a thickness close to 0.025, in reality, it is often 0.05 to 0.5□ due to manufacturing methods and handling considerations. There was a problem with the connection because it was used.

For example, if a 0.05 to 0.5-low melting point alloy foil is used, the melting time will be extended due to the large heat capacity of the foil itself, or the electric saw will cause the molten alloy to separate from the joint due to the excessive amount of alloy. This may cause damage to the printer, etc.

The present invention provides a method for connecting adjacent storage batteries that eliminates the above-mentioned drawbacks, that is, a conductor connecting terminals of adjacent storage batteries or a terminal connected to the conductor with a melting point of 40.
The present invention provides a connection method in which the low melting point alloy foil is bonded with a low melting point alloy foil of ~180° C., in which the low melting point alloy foil is inserted into a connecting portion in the form of a sag or a grid and melted and bonded. Next, the present invention will be explained in detail using embodiments illustrated in the drawings. Figures 1, 2 and 3 show a storage battery device in which adjacent storage batteries are connected by the connection method of the present invention.
1, V is the storage battery, 2 is the cathode terminal of the storage battery 1, 2'' is the anode terminal of the storage battery 1'', 3 is the connecting conductor, 4
1 is a sagging low melting point alloy foil with a wall thickness of about 0.05 to 0.5 for joining the cathode terminal 2 and the connecting conductor 3 and the anode terminal 2'' and the connecting conductor 3, and l is another example of the low melting point alloy foil. The lattice-shaped low melting point alloy foil shown in FIG. 4 and 41 in FIG. 4 indicate a conventional low melting point alloy foil.

FIG. 5 shows another example of a storage battery device in which adjacent storage batteries are connected by the connection method of the present invention, in which the same reference numerals as in FIG. 1 indicate the same operating members. Further, in this embodiment, the connecting conductor 3 shown in FIG. 1 is not used, and the cathode terminal 2 of the storage battery 1 and the cathode terminal 2'' of the storage battery 1'' are directly connected to the sag-like low melting point alloy foil 4 shown in FIG. Alternatively, they are joined using a lattice-shaped low melting point alloy foil 4' as shown in Figure 4. Figures 2 and 3
By melting and bonding using sag-like or lattice-like low melting point alloy foils 4, 4' with a wall thickness of 0.05 to 0.5 rm as shown in the figure, the characteristics of the connection between adjacent storage batteries can be made extremely good. . That is, when a conventional low melting point alloy foil 4'5 as shown in FIG. Is the wall thickness of 455 0.05 to 0.5? and
The amount of low melting point alloy foil 4'5 required for actual bonding is 0.
025rw1 is sufficient.

Therefore, since the heating and melting time is relatively long and the absolute amount is large, the molten alloy falls away from the molten alloy joint and damages electric saws, plugs, etc. On the other hand, the low melting point alloy foil used in the invention has a wall thickness of 0.05 to 0.0.

Even at 5 wrm, the shape is shaped like a sag or a lattice so that the absolute mass is equal to the wall thickness of 0.025 mm, so the amount of low melting point alloy is appropriate, the heating melting time is short, and the molten alloy is The workability is excellent because the metal does not separate from the joint and damage the electric saw, puta, etc.

Furthermore, since extremely stable bonding can be obtained, it is possible to obtain a storage battery device that not only has improved corrosion resistance of the connection portion but also has improved reliability. As described above, in the present invention, in order to remove unnecessary parts from a thick low melting point alloy foil having an amount greater than the appropriate amount required for bonding and to obtain an appropriate amount, the low melting point alloy is formed into a sag or a lattice shape. This sag or lattice shape can be determined by determining the amount to be removed based on the bonding interval, the area of the bonding surface, etc. In this type of bonding, the most ideal bonding distance is 0.5rm or less for the bonding material to properly diffuse over the entire surface of the bonded surface due to capillary action, and furthermore, the diffused alloy is In order to bond intermolecularly and obtain a large bond strength, it is necessary to have the best bond spacing so that the alloy solidifies and shrinks after melting. The most effective bonding interval is about 0.025 mm. Since this allows determining the appropriate amount of alloy required for bonding, the amount to be removed can also be determined. The appropriate amount of alloy required for joining can also be determined using the following simplified formula. However, St, s5t5: Appropriate amount of alloy (d), s: Area of joint surface or alloy foil (Cn
l), t: optimal bonding distance (Wm), s'': optimal area of bonding surface or alloy foil determined by t'' (Cd), t'
: Thickness (Cin) of alloy foil that can actually be manufactured.

Since the area of the joint surface or alloy foil can be determined using the formula 2), the area to be deleted can also be determined. As described above, according to the present invention, the workability of connecting adjacent storage batteries is improved, and an extremely good connection can be obtained without damaging the electric saw, plug, etc. during connection. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a storage battery device completed using the method of connecting adjacent storage batteries of the present invention, and FIG. 2 is a perspective view showing a sagging low-melting point alloy foil used in the method of connecting adjacent storage batteries of the present invention. , FIG. 3 is a perspective view showing a lattice-shaped low melting point alloy foil used in the method of connecting adjacent storage batteries of the present invention, and FIG. 4 is a perspective view of the low melting point alloy foil used in the conventional connection method between adjacent storage batteries.
FIG. 5 is a perspective view showing another example of a storage battery device completed using the method of connecting adjacent storage batteries of the present invention. 1,1゛...Storage battery, 2...Cathode terminal, 2''...
Anode terminal, 3... Connection conductor, 4... Sloped low melting point alloy foil, 4'... Grid shaped low melting point alloy foil.

Claims (1)

[Claims] 1. In a connection method in which the terminals of adjacent storage batteries or a connecting conductor and a terminal connected to the conductor are joined using a low melting point alloy foil having a melting point of 40°C to 180°C, the low melting point alloy foil is formed into a sag or a lattice shape. shape and insert it into the above connection part,
A method for connecting adjacent storage batteries, characterized by melting and joining them.