JPH0443976Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention relates to a battery with lead terminals, which has lead terminals fixed to the terminal surface for direct attachment to a printed circuit board or the like.

<Prior art> Batteries with lead terminals as described above are widely used as power supplies for IC memory backups in various electronic devices, and in order to ensure stable operation over long periods of time, batteries with lead terminals such as those described above are used as flat batteries, cylindrical batteries, etc. One end of the lead terminal made of a nickel-plated metal plate, nickel plate, or nickel rod with a thickness of about 0.2 mm is directly fixed to the battery terminal surface of the battery by laser welding, spot welding, etc., and this lead terminal is A structure is adopted in which the other end is attached by soldering to a board terminal hole or the like. The above spot welding (resistance spot welding) is a welding method that utilizes resistance heat generation at the connection surface between the lead terminal and the battery terminal surface, while laser welding utilizes heat generation due to laser beam irradiation on the battery terminal surface. This is a welding method. Looking at the cut surfaces of these welds, in the case of spot welding, nuggets due to welding are observed only near the connection surface between the lead terminal and the battery terminal surface. On the other hand, in laser welding, this nugget is observed continuously from the surface of the battery terminal surface to the vicinity of the connection surface with the lead terminal. Therefore, this nugget can be used to distinguish between resistance spot welding and laser welding.

By the way, IC chips, capacitors, resistors, etc. are mounted at a fairly high density on the board to which this type of battery with lead terminals is directly attached.
When installing a battery with lead terminals, its positional relationship with other components on the board is strictly regulated. For this reason, when welding lead terminals to the terminal surface of flat batteries, etc., a high degree of installation accuracy is required for the lead terminals.
The accuracy of positioning the lead terminal to the battery during welding is important. In particular, in the case of a type in which the lead terminals are fixed by laser welding, the quality of the welding may be greatly influenced by the positioning accuracy, so the requirement for the same accuracy is particularly high.

Such positioning cannot be performed with high accuracy because it is extremely difficult to perform positioning accurately by using only various jigs used during welding, such as battery fixing jigs and lead terminal clamping jigs. For this reason, conventionally, a step is formed on the lead terminal,
A method in which the position of the lead terminal on the battery terminal surface is determined by the step by locking this step with a positioning jig, or a method in which multiple pin holes with a diameter smaller than the terminal width are provided in the lead terminal, A method of positioning the lead terminals by passing pin guides for position regulation through these pin holes and fixing the lead terminals on the battery terminal surface is used.

<Problems to be solved by the invention> However, with the method of forming a step on the lead terminal, it is often not possible to provide a sufficient step due to restrictions on the spacing between other components when mounting the board. Batteries with lead terminals that use small batteries such as lithium batteries are often used when there is not enough mounting space on the board, so this tendency is large, and therefore this type of method is The problem is that there are many cases in which it is difficult to apply.

In addition, with the method of providing pin holes in the lead terminals,
If the thickness of the lead terminal is as thin as about 0.2 mm, as when using a lead plate, the pin hole will not be able to engage the pin guide securely, making it difficult to provide a sufficient guide, and when drilling the hole in the lead terminal. There is a problem in that the press-type drilling pins tend to break or wear out easily, resulting in high costs.

<Means for Solving the Problems> The battery with lead terminals of this invention, which was created in view of the above problems, has a battery and a lead terminal, and one end of the lead terminal is fixed to the terminal surface of the battery. and a current is taken out from the other end of the lead terminal, wherein at least the one end of the lead terminal is formed into a plate shape, and the other end of the one end is An end surface is formed at the end opposite to the section, and at least a portion of the end surface is located on the outer peripheral edge of the terminal surface.

In addition to the lead plate, the lead terminals mentioned above can be ordinary lead wires or lead wires whose terminal surfaces are shaped into a flat plate.As batteries, flat batteries or cylindrical Needless to say, a shaped battery or the like can be used.

<Function> By using the above means to position at least a portion of the lead terminal end surface on the outermost edge of the battery, and by adopting a method of fixing it to the battery terminal surface by welding or the like, the lead terminal The positioning and positioning of the lead terminal can be easily performed only by devising the jig used during welding without providing a stepped portion or a pin hole.

<Example> An example in which this invention is applied to a battery with lead terminals consisting of a flat battery and a lead terminal plate will be described below with reference to the accompanying drawings.

Example 1 In FIG. 1A, metal plate-shaped lead terminals 2 and 3 with a thickness of about 0.2 mm are respectively attached to the positive terminal surface 1a and the negative terminal surface 1c of the flat battery 1 by laser welding or the like. It is fixed. Lead terminal 2,
End face 2a, 3 on the opposite side to the side to be attached to the board of 3
The portions a are each formed into an arc having substantially the same shape as the outer peripheral edge 1b of the positive electrode terminal surface 1a or the outer peripheral edge 1d of the negative electrode terminal surface 1c, and are located on these outer peripheral edges. In addition, in the figure, 2d and 3d are board hole insertion pieces, 2b, 2c, or 3b, 3c are end surfaces adjacent to both sides of the end surface 2a or 3a, and "x" is a welded part. be.

Next, an example of manufacturing a battery with lead terminals as described above will be explained using FIGS. 2A and 2B. In FIG. 2B, the internal structure of the flat battery 1 is omitted for convenience.

First, the battery 1 is housed and fixed in a battery fixing jig 8 in which a groove 8a large enough to receive the flat battery 1 is formed. While it is held movably in the middle and left and right directions, it is moved in the direction of the arrow until its end surface 2a comes into close contact with the inner peripheral surface of the groove 8a. Lead terminal 2 is attached by a laser welding beam from a laser welding tool that does not
is welded to the positive terminal surface 1a of the flat battery 1. Further, the lead terminal 3 is also welded to the negative electrode terminal surface 1c in the same manner.

Embodiment 2 In the battery with lead terminals shown in FIG. 1B, each terminal surface of the flat battery 1 is provided with a plate-shaped wide lead terminal 4 having two board hole insertion pieces,
5 are fixed respectively. The end surface 4 of these lead terminals 4 and 5 on the opposite side to the side to be attached to the board
Both ends of a and 5a are the outer peripheral edge 1 of the positive electrode terminal surface 1a.
b, or on the outer peripheral edge 1d of the negative electrode terminal surface 1c.Similar to the first embodiment, the flat battery 1 is housed in a fixing jig, and the lead terminal 4 is placed on the clamping jig.
Alternatively, the illustrated battery with lead terminals can be obtained by holding the battery 5 movably, bringing both ends of the end face 4a or 5a into contact with the inner peripheral surface of the fixing jig, and performing welding in this state.

Embodiment 3 In the battery with lead terminals shown in FIG. It is located on the outer peripheral edge 1b or 1d of , and is manufactured in the same manner as in each of the above embodiments.

It goes without saying that the present invention can be similarly applied to a battery with a lead terminal using a cylindrical battery or the like as a battery and a lead wire or the like as a lead terminal.

<Effects of the invention> According to the battery with lead terminals of this invention constructed as described above, the positioning and positioning of the lead terminals can be performed by using only a jig without providing a step or a pin hole in the lead terminals. can be easily and accurately carried out, and this type of battery can be manufactured easily.

[Brief explanation of the drawing]

1A to 1C are plan views showing embodiments of the present invention, FIG. 2A is an explanatory diagram of the manufacturing process of the embodiment, and FIG. 2B is a sectional view taken along the line -- in FIG. 2A. 1... Flat battery, 2-7... Lead terminal, 1
a...Positive electrode terminal surface, 1b, 1d...Outer periphery, 1c
...Negative terminal surface.

Claims (1)

[Claims for Utility Model Registration] 1. It has a battery 1 and lead terminals 2 to 7, and one end of the lead terminals 2 to 7 is attached to the battery 1.
A battery with lead terminals, which is fixed to the terminal surfaces 1a, 1c of the lead terminals 2 to 7, and from which current is taken out from the other ends of the lead terminals 2 to 7, wherein at least one end of the lead terminals 2 to 7 is plate-shaped. end surfaces 2a to 7a are formed at the end of the one end opposite to the other end, and at least a portion of the end surfaces 2a to 7a are formed in the terminal surfaces 1a, 1c. A battery with lead terminals, characterized in that the lead terminals are located on the outer peripheral edges 1b and 1d of the battery. 2. The battery according to claim 1, wherein the battery is a flat battery. 3. The battery according to claim 2, wherein the lead terminal is fixed to the terminal surface by laser welding.