JPS6054162A - Primary battery - Google Patents

Abstract

PURPOSE:To produce a battery which does not self-discharge even when stored for a long time by separately enclosing a battery active material and an electrolyte and by making the battery function in using it with the electrolyte pushed out into the active material. CONSTITUTION:A battery main body A contains positive/negative electrode active materials and separators between the externally installed collectors 1a and 1b, and is completely sealed along the outside circumference by using a hot melt adhesive. In a bag B which contains an electrolyte, an externally installed collector is made up of the same film as used in the main body A without a break between them, and it is also perfectly sealed along the outside circumference with a hot melt adhesive in the same manner. The boundary section between the main body A and the bag B is heat sealed 8 to prevent leakage of the electrolyte. However, the adhesive strength in the boundary section in adjusted so that the electrolyte 6 in the bag B can be pushed out into the main body A by applying a pressure on it with a man's finger or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a primary battery having a structure in which an active material and an electrolyte are completely separated and independent.

Conventional primary batteries are button-shaped or coin-shaped due to their basic structure. Cylinder type. In bottle-type and flat-plate batteries, it is inevitable that the entire amount of positive and negative electrode active materials and electrolytes used must be kept in a tight space. Naturally, it has the advantage that voltage is generated and current can be taken out as soon as the battery is assembled, but it has the disadvantage that storage performance, which is the most important aspect of battery performance, and especially self-discharge are inevitable.

In recent years, with the development of a wide variety of electronic devices including the entire field of microelectronics, the needs for batteries as power sources have become extremely diverse and sophisticated. In particular, demands for reliability in electronic devices are increasing, and there is a strong need to improve the reliability of batteries as power sources. Particularly in replacement batteries that are stored for a long period of time, there are problems in that due to self-discharge, the initial battery capacity decreases to 80 to 90 cm after one year of storage, or leaks.

In response to this, the conventional method is to confine the electrolyte in a microcapsule, insert it into the same sealed space as the positive and negative electrode active materials, and apply pressure and heat during use to destroy or dissolve the flask capsule. Although it has been widely used, the microcapsule technology is advanced and the cost is low.

The present invention has the object of eliminating these drawbacks, providing a primary electric current that has excellent survivability over a long period of time, and can be produced at low cost.

Hereinafter, the present invention will be explained in detail using specific examples.

FIG. 1 is an external view of a flat secondary battery according to the present invention. FIG. 1A shows the battery main body, in which positive and negative electrode active materials and a separator are housed in an exterior current collector, and the surrounding area is completely sealed with true melt adhesive. Figure 1B is electric)
11) A bag for storing the liquid and an exterior current collector are made of the same continuous film as A, and the periphery is similarly completely sealed with true melt adhesive. The boundary between A and B is heat-sealed to prevent leakage of the electrolyte.

However, when this battery is fully used, the force of contact is adjusted so that pressure can be applied to B with a finger or the like to push out the internal liquid to A.

FIG. 2 is a cross-sectional view of the flat plate-shaped curve of the present invention.

In the figure, 1a is the negative electrode outer power supply sheet with thicknesses of o and o5.
wn is an aluminum foil, 2a is a positive electrode-ti peep sheet made of conductive glass film with a thickness of 0.05 mm,
It is laminated with the aluminum sheet 1a.

Similarly, Ib and 2c are laminated with a 0.05 mm thick aluminum positive electrode outer current collector sheet and a 0.05 mm thick conductive plastic film. 2b has a thickness of 0
．． 05 van intermediate current collector made of conductive plastic film. 5a and 3b are negative electrode active materials, which are zinc-gold kite sheets. It is a sheet made of metallic zinc powder or a sheet made of hydrated zinc powder. In 4a and 4b, grafted polyethylene film or grafted vapor was used.

5a, 5b are positive electrode active material layers mainly composed of manganese dioxide, with a small amount of acetylene blank and pintar added as conductive materials. No. 6 was an electrolytic solution containing zinc chloride as its main component, and a small amount of ammonium chloride and zinc oxide were also added.

The electrolytic solution 6 may be an alkaline hydroxide solution.

, 7 is an adhesive layer obtained by applying a polyamide-based true-melt adhesive to the upper surface of the outer periphery of the conductive glass film and heat-sealing the same at the time of battery assembly.

8 is an adhesive layer that separates the flat battery body and the electrolyte storage bag, and a polyethylene film sheet was used.

As can be seen from the above description, in this embodiment, two unit cells are stacked in series, but the number of stacked units is not particularly important. As for the raw materials used above,
It can be changed depending on changes in the bending system or the type of electrolyte, but is not limited to this. Furthermore, regarding the shape, the third
The battery storage bag may be of an unusual shape, such as having the entire donut shape and the battery body provided inside the donut ring (Figure 3). The key point of the present invention is that the battery active material and the electrolyte are separated and placed separately, and when used, the electrolyte is pushed out to the back of the active material to exert the battery function.

As described above, in principle, the primary cell according to the present invention does not allow the electrolyte to come into contact with the active material no matter how long it is stored, so that it is easy to obtain a battery that does not self-deplete or self-discharge. .

[Brief explanation of the drawing]

FIG. 1 shows an external appearance 1 of a flat battery showing an embodiment of the present invention.
2 shows a sectional view thereof, and FIG. 3 shows another embodiment of the present invention. b: A plan view of the pond. 1a... Negative electrode aluminum foil, 2a... Negative electrode conductive plastic film current collector, 3a, 3b... Negative active material, 4a, 4b... Separator, 5a, 5b...
Positive electrode active material, 6... Electrolyte, 7... True melt adhesive, 8... Hot melt adhesive film. Applicant Daini Seidokusha Co., Ltd. Attorney: Mogami

Claims (1)

[Claims] In a battery consisting of a positive electrode active material, a separator, a negative electrode active material, a positive electrode current collector, and a negative electrode 9, an electric body, and an adhesive sealing material, all the electrolyte is in contact with the current collector and the exterior member that are integrated with the battery. A primary battery with an independent sealed storage space.