JPH0433651Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention relates to a battery with a lead body. Specifically, it is constructed by attaching one end of the lead body for current extraction to the terminal of a coin-shaped or cylindrical battery. This invention relates to a so-called battery with a lead body for mounting on a board.

<Prior Art> With the recent spread of various electronic devices, batteries with lead bodies as described above are used as backup power sources for IC memories and the like.
Since long-term stable operation is required, a lithium battery with excellent operating temperature characteristics and storage characteristics, high energy output, and long life is used as a battery, and lead bodies are installed on the positive and negative terminal surfaces of the battery. One end is often attached by spot welding or the like, and the other end of the lead body is soldered directly to a printed circuit board or the like.

By the way, when using a metal wire such as a nickel wire as a lead body, one end of the metal wire is formed into a plate-shaped part by press molding, etc., this plate-shaped part is brought into contact with the battery terminal surface, and both are joined by spot welding etc. A method of fixing and electrically connecting is usually used. When molding a plate-shaped part like the one above, conventionally the method shown in Fig. 3A
As shown in FIG. 4A, one end of the metal wire 6 is compressed evenly from both sides to form the plate-shaped portion 6a, or as shown in FIG. A method such as molding is used. On the other hand, in the case of a lead-equipped battery using such a lead wire, one end of the lead wire is often bent before use. There are three places to bend: the shaft of the lead wire, the boundary between the plate-like part and the shaft, and the plate-like part. The first two methods are common, as they are not very advantageous because it is difficult to determine the location.

<Problems to be solved by the invention> Incidentally, although bending at the above point is strong against repeated bending, this point is extremely difficult to bend and must be welded to the battery terminal surface in a pre-bent state. However, productivity is low. and,
In the case of the metal wire 6 shown in FIG. 3A, when welding it to the battery terminal surface, the gap created between the plate-shaped portion 6a and the terminal surface 7 becomes considerably large as shown in FIG. 3B. . For this reason, it is difficult to perform welding work, and problems such as insufficient welding strength are likely to occur during welding, and problems such as poor connections are likely to occur and the plate-shaped portion 6a is easily deformed. There is.

On the other hand, the above-mentioned parts are easy to bend and can be bent after being welded to the battery, so productivity is high. and,
In the case of the metal wire 6 shown in FIG. 3A, gaps are likely to occur. In addition, the metal wire 8 shown in FIG.
In this case, since the plate portion 8a and the shaft portion 8b are flush on the side that contacts the battery terminal surface, for example, the item intended to be bent as shown in Figure 4B may be bent as shown in Figure 4C. There are problems in that the bends are often uneven, the bending positions are difficult to be the same, the radius of the bending portions also varies widely, the process control is complicated, and the reliability is poor.

<Means for solving the problem> The battery with a lead body of this invention is a battery with a lead body having a battery 1 and lead bodies 2 and 3, and the lead body has an axis of the lead body at one end. A plate-shaped part 2a is provided, which is formed by being displaced from the center line of the battery.
a and 1b and are electrically connected to each other, and the distance t1 between the leads is 5 to 20% of the diameter t2 of the lead body.

If the opposing spacing is less than 5% of the metal wire diameter, as in the case of the terminal shape as shown in FIG. Also, 20%
If it is larger, as in the case of the terminal shape shown in FIG. 3A, the gap between the plate-shaped portion and the terminal surface to be welded becomes large, causing a practical problem.

<Function> By using the above-mentioned means, in either case of bending at the above-mentioned points or points, the facing distance between the metal wire plate-shaped part and the battery terminal surface can be adjusted from the viewpoint of ensuring welding strength in spot welding. This can be kept small to such an extent that it does not pose a practical problem, and variations in the bending position and radius of the bending portion when bending at the point can be efficiently prevented.

<Embodiment> FIG. 1A shows an embodiment using a coin-shaped battery 1, in which metal wires 2 and 3 such as nickel wires are used as leads on the terminal surfaces 1a and 1b of the battery 1, respectively. Attached by spot welding.

The metal wire 2 (the metal wire 3 is the same as the metal wire 2, so its explanation will be omitted for convenience) has a diameter of about 0.75 mm, and one end has a thickness of 0.2 mm as shown in Figure 1B.
It is formed into a plate-like portion 2a of about 100 mL. Plate portion 2a
The center plane of the metal wire 2 is located closer to the battery terminal surface (lower side in FIG. 1B) than the center line of the shaft portion 2b of the metal wire 2. Further, the distance t1 between the battery terminal surface side surface 2c of the plate-shaped portion 2a and the extension line of the outer peripheral end of the shaft portion 2b on the battery terminal surface side is 5 to 20% of the diameter t2 of the shaft portion 2b.

As a method of forming the plate-like portion 2a as described above on the metal wire 2, for example, as shown in FIG.
One end may be pressed using a suitable mold 4, 5, and by this pressing process, one end of the metal wire 2 becomes a plate-shaped portion 2a as shown in FIG. 2B. If this metal wire 2 is bent, for example, at the shaft portion 2b, and then the plate-shaped portion 2a is spot-welded to the battery terminal surface, an embodiment as shown in FIG. 1A is obtained.

<Effects of the invention> The battery with a lead body of this invention has the above-mentioned configuration, and when bending any part of the metal wire that is the lead body, the metal wire plate-shaped portion and the battery terminal surface are It is possible to reduce the facing distance to such an extent that it does not pose a practical problem, and it is also possible to efficiently prevent variations in the bending position and radius of the bending part, and to improve weldability and workability. be effective.

[Brief explanation of drawings]

FIG. 1A is a perspective view showing an embodiment of the present invention, FIG. 1B is a side view showing a metal wire used in the embodiment,
FIGS. 2A to 2C are explanatory diagrams showing a part of the process for producing the metal wire, and FIGS. 3A and 3B and FIGS. 4A to C are explanatory diagrams showing a metal wire used in a conventional example. 1... Battery, 1a, 1b... Terminal surface, 2, 3,
6, 8...Lead body (metal wire), 2a, 6a, 8
a...Plate-shaped part, 2b, 6b, 8b...Shaft part, 2c
...Battery terminal side surface, t1... Opposing interval, t2
...The diameter of the lead body.

Claims (1)

[Claims for Utility Model Registration] A battery with a lead body having a battery 1 and lead bodies 2 and 3, wherein the lead body has a plate shape formed at one end of the lead body displaced from the center line of the shaft portion of the lead body. A portion 2a is provided, and the plate-like portion is arranged opposite to and electrically connected to the terminal surfaces 1a and 1b of the battery, and the opposing distance t1 is equal to 5 of the diameter t2 of the lead body.
A battery with a lead body characterized by a ratio of ~20%.