JPS60243966A - Thin type battery - Google Patents

Abstract

PURPOSE:To eliminate a space for battery connecting part and make an electronic appliance thin by forming together a lead projecting outward in a part of each circumference of electric conductive sheets placed on both sides of a battery. CONSTITUTION:Electric conductive sheets 1 and 2 placed on both sides of a battery consist of nickel plated stainless steel or aluminium sheets. An insulated sealing part 3 placed between the circumferences of the conductive sheets 1 and 2 are bonded to the sheets 1 and 2 with adhesive 10 and 10. Leads 1a and 2a projecting outward are formed together in a part of each circumference of a set of electrically conductive sheets 1 and 2. A thin type battery is connected to a circuit through the leads 1a and 2a.

Description

[Detailed description of the invention] [Technical field of invention] This invention relates to a thin battery.

[Technical background of the invention and its problems]

Recently, a thin battery has been developed in which an electromotive unit is provided between a pair of conductive sheets of a positive electrode and a negative electrode, and the periphery between the pair of conductive sheets is sealed with an insulating sealing member. They are beginning to be used as power batteries for thin electronic devices.

FIG. 4 shows the external appearance of a conventional thin battery, which is connected to a circuit by means of battery connecting members that are in contact with the outer surfaces of the conductive sheets 1.2 on both sides of the battery. In FIG. 4, reference numeral 3 designates an insulating seal member for sealing the area between the conductive sheets 1 and 2.

FIG. 5 shows the state in which the conventional thin m battery is mounted in an electronic device, and the thin battery is housed in a battery storage section 5 provided in an electronic device case 4. Further, in FIG. 5, 6 is a circuit board provided in the equipment case 4, and battery connecting members 7a and 7b that contact the thin battery are:
The base end portions thereof are fixed to the upper and lower surfaces of the end portions of the circuit board 6, respectively, and are supported by the circuit board 6.

The battery connecting members 7 a r 7 b are all made of leaf springs, and are in elastic contact with the outer surfaces of the positive conductive sheet 1 and the negative conductive sheet 2 of the thin battery, respectively, to connect the conductive sheets of the thin battery. 1°2 and the circuit board 60 circuits are connected.

In this way, the thin battery is connected to the circuit board 6 by the battery connecting members 7a and 7b that contact the conductive sheets 1 and 2 on both sides of the battery.
0 circuit is connected to the conductive sheet (Z), and when the lead wire is soldered to 2, the conductive sheet I is soldered due to the heat of the soldering.

2 is deformed to form an electromotive unit and a conductive sheet in the battery) J,
This is because if a gap is formed between the electromotive unit and the electromotive unit, the electrolytic solution impregnated in the separator of the electromotive unit will evaporate, and the internal pressure of the stain pond will increase, which may destroy the battery.

However, when connecting the thin battery to the circuit by bringing the battery connecting members 7a, 7b into contact with both sides of the thin battery as described above, the battery connecting members 7a, 7b are placed above and below the battery storage section 5 in the electronic device case 4. 7b had to be accommodated, and for this reason, it was not possible to reduce the thickness of the electronic device even though a thin battery was used as the power source.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances, and its purpose is to connect to a circuit without using battery connecting members that contact both sides of the battery as in conventional thin batteries. To provide a thin battery capable of reducing the thickness of an electronic device by eliminating the need to secure a space above and below a battery storage part in an electronic device case to accommodate the battery connecting member.

[Summary of the invention]

That is, the thin cell of the present invention is formed by integrally forming a lead portion extending outward from a part of the outer periphery of the conductive sheet on both sides of the battery.

[Embodiment of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show the external view and cross-section of the thin battery of this example.The conductive sheets on both sides of the battery are made of stainless steel or aluminum sheets, each with nickel plating on the surface. It is made of a hardened metal sheet,
An insulating sealing member 3 sealing the periphery between the pair of conductive sheets 1 and 2 includes the conductive sheets 1 and 2 and an adhesive 10.
10.

Reference numeral 11 denotes an electromotive unit provided between the pair of conductive sheets 1 and 2, and this electromotive unit 11 includes a positive electrode active material (for example, manganese dioxide) 12 printed on the inner surface of the positive electrode conductive sheet 1. A separator (a nonwoven fabric impregnated with an electrolyte) 1 is polymerized on top of the positive electrode active material 12.
3 and a negative electrode active material (for example, lithium metal foil) Z4 polymerized on the separator 13 are separated, and the negative electrode active material 14 is brought into direct contact with the lower surface of the negative electrode conductive sheet 2.

The thickness of the pair of conductive sheets z and 2 is 50 μ to 1 oo μ, and the thickness of the positive electrode active material 12 is 150 μ.
~180μ, the thickness of the negative electrode active material I4 is 50μ~80μ,
The thickness of the separator 13 is 100μ to 15-oμ,
The total thickness of this lake-type battery is 450μ to 500μ.

- 10,000, the pair of conductive sheets 1 and 2 have a lead portion 1a extending outward on a part of their outer periphery.

2a, and this thin battery is connected to a circuit via the lead portions 1a and 2a. Note that the nickel plating on the surfaces of the conductive sheets 1 and 2 is applied to the lead portions 1 a r 2
It has been applied except for &.

Fig. 3 shows the thin battery mounted in an electronic device. The leading end of the lead portion 111 + 2 a is connected to the circuit on the circuit board 6 by soldering or adhesive using a conductive adhesive. Note that even if the lead parts 1a and 2a are soldered to the circuit board 6, if the lengths of the lead parts 1a and 2tx are made sufficiently long,
Soldering prevents the heat from being transmitted from the linide parts 1a and 2a to the main body of the battery and causing thermal damage to the battery.

Further, the electronic device case 4 includes a pair of earthwork case bodies 4a.
+ 4b is made of synthetic resin, and the lead part Za+ of the thin battery stored in the battery storage part 5
2a are through holes 8, 8 provided in the side wall 5a of the battery storage section 5.
It is led out from the circuit board 6 and connected to the circuit board 6.

As described above, this thin battery has lead portions Za extending outward on the conductive sheets 1 and 2 of the positive and negative electrodes.
, 2a are integrally formed, so that they can be connected to the circuit without using battery connecting members that contact both sides of the battery, unlike conventional thin batteries. Since it is not necessary to secure a space above and below for the battery connecting member to enter, the electronic device can be made thinner.

In addition, in the above embodiment, the lead parts 1a on the positive electrode side and the negative electrode side,
2a extend in the same direction, but this lead portion za,
2tx may extend in different directions, and the outer shape of the thin battery is not limited to a rectangle but may be circular.

〔Effect of the invention〕

According to the thin battery of the present invention, unlike conventional thin batteries, it can be connected to circuits at various times using battery connecting members that contact both sides of the battery, and therefore can be connected to circuits at various times in the upper and lower portions of the battery compartment in an electronic equipment case. Since there is no need to secure a space for the battery connecting member to fit in the electronic device, it is possible to make the electronic device thinner.

[Brief explanation of drawings]

1 and 2 are an external view and an enlarged sectional view of a thin battery showing an embodiment of the present invention, FIG. 3 is a sectional view of an electronic device similarly showing the state in which the thin battery is mounted, and FIGS. 4 and 5. The figures are an external view of a conventional thin battery and a sectional view of an electronic device in which the battery is mounted. 1.2... Conductive sheet, la, 2t>... Lead portion, 3... Seal member, 11... Electromotive unit, 12
...Positive electrode active material, Z3...Separator I/-ta, 14...
-Negative electrode active material, 4...Electronic equipment case, 5...Pamin pond storage section. Applicant's Representative Patent Attorney Suzue, Takehiko Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In a thin battery in which an electromotive unit is provided between a pair of conductive sheets of a positive electrode and a negative electrode, and the periphery between the pair of conductive sheets is sealed with an insulating sealing member, a A thin battery characterized by integrally forming a lead portion that extends outward from a portion.