JPS59138071A - Manufacture of battery with pin terminal - Google Patents

Abstract

PURPOSE:To prevent defectives such as internal short and increase reliability of a battery by welding a pin terminal for connecting, to the outside of a negative terminal prior to assembling of a battery. CONSTITUTION:A connecting pin 30 of negative side is spot-welded to the outside surface 26 of a negative terminal plate 20 which is part of a battery case, and lithium as a low melting point light metal 10 is pressed on the current collecting surface inside the negative plate 20. The light metal 10 is pressed on the current collecting surface using a synthetic resin jig and metallugically bonded to the negative terminal plate 20 by ultrasonic wave. Then a battery with pin terminal is assembled with the negative plate 20, a positive can 24 having a positive electrode 18, a separator 16, a gasket 22, and a nonaqueous electrolyte.

Description

[Detailed description of the invention] The present invention relates to a method of manufacturing a battery with pin terminals.

In recent years, printer i-
Batteries that can be soldered directly onto a circuit board or mounted via a socket have come into use. For such a battery, for example, in order to mount it on a board 1, a pin terminal for connection is removed in the same way as other electronic components such as an IC.

In recent years, batteries using low-melting point light metals such as lithium and lithium have come into practical use.

This battery uses highly chemically active lithium as its negative electrode.
Since low-melting point light metals such as sodium and the like are used, the theoretical energy density is high, and as a result, a compact and long-life battery can be constructed. Therefore, -C1 A battery using this low melting point light metal for the negative electrode is particularly suitable for use as the above-mentioned backup power source.

Therefore, as shown in FIG. 1, a power generating element 12 covering a low melting point light metal 10 such as lithium or sodium as a negative electrode is incorporated into a metal battery case 14 which also serves as an electrode terminal.
Connecting pin terminals 30 are provided on the negative terminal plate 20 that contacts the light metal 10 of the negative electrode and the positive electrode can 24 that contacts the positive electrode.
Batteries with bottle terminals, which are made by welding and joining 32, have come to be manufactured. The battery with bin terminal shown in the same figure is
A negative electrode whose power generating element 12 is made of a low melting point light metal 10;
A separator 16 containing a non-aqueous electrolyte and a positive electrode 18 mainly made of, for example, manganese dioxide are laminated in a durable manner. Case 11!I is a metal negative terminal plate 20
, an insulating gasket 22 and a positive electrode can 24. Bin terminal 30.

32 is the negative electrode terminal plate 20 and the negative electrode terminal surface 2 of the positive electrode can 24
6 and the positive electrode terminal surface 28 by welding, respectively.

By the way, in the conventional manufacturing method of this type of battery with bottle terminals, first, the low melting point light metal 10 is placed in contact with the inner current collecting surface of the negative electrode terminal plate 20 by pressure bonding, and then this negative electrode terminal plate 20 to assemble the battery once. Then, by welding the bin terminals 30 and 32 to predetermined positions of the assembled battery, a battery with bin terminals, which is a final product, is completed.

However, in the conventional manufacturing method as described above, in particular, the negative electrode pin terminal 30 is placed on the negative electrode terminal surface 2 of the negative electrode terminal plate 20.
When welding to 6, due to the heat during welding, ゛C1
The low melting point light metal 10 inside the negative electrode terminal plate 20 may be partially melted, and in some cases, the heat during welding may cause the separator 16 to melt.
The separator also partially melted when the temperature reached 1υ, which was likely to cause failures including internal short circuits. Furthermore, even if a failure that immediately appears externally such as an internal short circuit does not occur, the heat generated when welding the pin terminal, especially the negative pin terminal 30, may cause some aftereffects on the battery, which may cause damage to the battery. reliability had decreased significantly. This results in a significant lack of suitability as a backup power source for memory boards that require extremely high reliability, for example.

This invention was developed in view of the above-mentioned conventional problems, and its purpose is to eliminate malfunctions such as short circuits caused by the provision of pin terminals by simply changing the process. Provided is a method for manufacturing a 4-cell battery that can reliably prevent the above-mentioned problems and also provide extremely high reliability that can be used sufficiently as a backup power source for a memory board, for example. It's about doing.

In order to achieve the above object, this invention-supporting method incorporates a power generating element having a low melting point light metal such as lithium or tritrium as a negative electrode into a metal battery case that also serves as an electrode terminal, and also incorporates a power generating element that has a negative electrode made of a light metal with a low melting point such as lithium or puttrium, and makes contact with the light metal of the negative electrode. Negative (terminal 83 J:
In the method for manufacturing a battery with a bottle terminal, the battery has a connecting bottle terminal that is welded to the positive electrode terminal that contacts the positive electrode and the positive electrode, respectively.
First, a connecting bottle terminal is welded to the outer terminal surface of the negative electrode terminal, and then the light metal is placed in contact with the inner current collecting surface of the negative electrode terminal to which the bottle terminal is welded. Juru is characterized by assembling batteries.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings. Note that common or corresponding parts in each figure are indicated using the same reference numerals.

Figure 2 a, b, and c are bottle terminals f according to this invention? 1
An example of a method for manufacturing two ponds will be shown. First, as shown in FIG. 1A, the negative terminal side connecting pin 3° is welded to the negative terminal surface 26 of the negative terminal plate 20, which also serves as a part of the battery case, by using, for example, electric spot welding. As the material of the negative electrode terminal plate 20, for example, stainless steel is used.

Next, as shown in the figure, a low melting point light metal 10 is crimped onto the inner current collecting surface of the negative electrode terminal plate 20 to which the bin terminal 30 is welded. Lithium is usually used as the low melting point light metal 1o. This low melting point light metal 10 is cut into a predetermined size in advance and is pressure-welded to the inner current collecting surface of the negative fi terminal plate 20 using a jig made of synthetic resin, and if necessary, using ultrasonic waves. The negative electrode terminal plate 20 and the light metal 1o
covering to also create a metallurgical bond between them.

After that, as shown in FIG.
4, the separator 16, the gasket 22, and the non-aqueous electrolyte to assemble the final target product, a battery with a bottle terminal C.

Note that the positive electrode side bottle terminal 32 is welded to the positive electrode terminal surface 28 of the positive electrode can 2/I by electric socket 1 - welding, etc., but this welding is performed after the power generating element 12 is assembled in the battery case 14. You can. This is because FA18 uses materials such as manganese dioxide, which are relatively less susceptible to the effects of oxidation. But preferably,
The positive electrode can 24 is also preferably welded to the positive terminal surface 28 of the bottle terminal 32 in advance before the battery is assembled.

Now, in the pin terminal f=J thunder pond manufactured as J: above, what happens to the heat generated when the pin terminal, especially the negative electrode side pin terminal 30, is welded to the low melting point light metal 1083, the separator 16, etc. Therefore, it is possible to reliably prevent failures such as internal short circuits and decrease in reliability.

As described above, in the method for manufacturing the bin terminal (J battery) according to the present invention, it is possible to prevent problems such as internal short circuits by changing the lattice, which is extremely simple, such as slightly changing the process order.
It is possible to provide a battery with a pin terminal, which can reliably prevent the occurrence of I, and can also significantly improve the reliability of the battery compared to conventional ones, and is extremely suitable for use as a backup power source for, for example, a memory board.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an example of a battery with a bottle terminal, Figure 2 a
, b and c are sectional views showing one embodiment of the method of the present invention in order.

Claims (1)

[Claims] (1) A power generating element with a negative electrode made of a low-melting point metal such as lithium or puttrium is incorporated into a metal battery case that also serves as an electrode terminal, and a negative electrode terminal that contacts the light metal of the negative electrode and a positive electrode terminal that contacts the positive electrode. In the method for manufacturing a battery with a pin terminal, the pin terminal is welded to the outer terminal surface of the negative terminal, and then this pin terminal is welded to the outer terminal surface of the negative terminal. negative t
1. A method for manufacturing a bin terminal battery, characterized in that the light metal is disposed in contact with the inner current collecting surface of the UQN element, and then the battery is assembled.