JPH08138688A - Sea-water cell - Google Patents

Abstract

PURPOSE: To facilitate short circuit inspection by forming holes on a frame body forming a cell, and closing the holes after the inspection. CONSTITUTION: Short circuit inspection holes 1 are respectively provided on two parts of a frame body 7 forming a cell 4. A part of an inspection tool is inserted from the holes 1, and the presence or absence of the short circuit between a positive electrode 5 and a negative electrode 6 is confirmed. After the inspection, when they are not short circuited, the holes 1 are closed by a pressure sensitive adhesive tape, or filling, fusing or the like after resins are filled in. Therefore, short circuit is easily found, and the work time can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention uses lead chloride as a positive electrode,
The present invention relates to an improvement in a method for manufacturing a seawater battery using a magnesium alloy as a negative electrode.

[0002]

2. Description of the Related Art A seawater battery is a battery that does not generate a voltage during storage, but generates electric power by using seawater as an electrolyte solution when it is placed in seawater during use. It has been put to practical use as a power supply for use.

Conventionally, in this type of battery manufacturing method, a battery is manufactured by laminating a plurality of cells 4 in which a positive electrode 5 and a negative electrode 6 are bonded to both sides of a frame 7 as shown in FIG. FIG. 4 is a diagram showing a frame body that has been conventionally used. This frame requires a seawater inlet / outlet 9 for taking in and discharging seawater, which is an electrolyte of the seawater battery, inside the battery. The path connecting the seawater inlet / outlet 9 and the inside of the battery is formed in a crank shape in order to reduce the leakage current generated when the battery is discharged.

If the battery is short-circuited, the discharge voltage is reduced by that amount, and the expected voltage cannot be exhibited. Therefore, it is important to check the presence or absence of a short-circuit for quality control. However, the battery manufactured using the frame as described above has a positive electrode 5
When checking whether or not there is a short circuit between the negative electrode 6 and the negative electrode 6, it is not possible to directly measure between the positive electrode 5 and the negative electrode 6 by a tester or the like because the route connecting the seawater inlet and outlet and the inside of the battery has a crank shape. So after the battery is completed,
The presence or absence of a short circuit could not be determined without actually discharging.

However, since the seawater battery is a primary battery and cannot be reused once it is immersed in seawater as an electrolytic solution, it is not possible to discharge all the finished products and check for the presence or absence of a short circuit. Therefore, quality control is performed by sampling a sample for each manufacturing lot and performing a discharge test.

If the sample to be inspected fails in this sampling test, the whole lot is rejected and rechecked. In this case, it was necessary to once disassemble the battery for all the manufacturing lots concerned, confirm the presence or absence of a short circuit mark, correct the part if there is a short circuit mark, and repeat the welding process. By repeating such an operation, the productivity of the battery becomes very low, which is not suitable for mass production.

[0007]

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned drawbacks and provides a conventional frame body with a hole for short circuit inspection so that the presence or absence of a short circuit can be confirmed before welding. is there. Further, providing the holes for short circuit inspection increases the number of holes in the conventional frame body, and if this is left as it is, the leakage current at the time of battery discharge is increased. Therefore,
After the inspection, the holes for short circuit inspection are closed with adhesive tape. As a result, it is possible to secure the performance as in the past.

[0008]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a frame body manufactured by the method of the present invention. The short circuit inspection hole 1 may be provided at one place or two places on the frame. FIG. 1 shows an example of the case where two locations are provided.

FIG. 2 is a perspective view of a seawater battery manufactured by the manufacturing method according to the present invention. The frame according to the present invention is provided with a hole for short circuit inspection as shown in FIG. When manufacturing batteries, stack the required number of cells, fix them with adhesive tape, etc., and insert a part of the inspection tool (tester probe, etc.) through the short circuit inspection hole to check for short circuits. The structure of the cell is the same as the conventional one except for the frame.

By adopting such a configuration, it becomes easy to find a short circuit and the number of battery repair works is reduced. Since the short circuit inspection can be easily performed on all the manufactured products, the quality is improved as compared with the inspection by the sampling test.

In the above embodiment, a part of the hole for short circuit inspection is also used as a part of the route connecting the seawater inlet and the inside of the battery, but the hole for short circuit inspection is used as the route connecting the seawater inlet and the inside of the battery. Can also be provided independently at another location. Also in this case, it is necessary to close the short circuit inspection hole after the inspection.

Although the short circuit inspection hole is closed with the adhesive tape in the above embodiment, it may be closed with other means.
For example, a resin block may be fitted and welded in the short circuit inspection hole, or the resin block may be closed by pouring and filling the resin.

[0014]

As described above, according to the present invention, it is easy to find a short circuit in a seawater battery, and the number of battery repair work can be reduced to shorten the working time, so that a uniform and highly reliable product can be obtained. It can be mass produced. Even if the present invention is adopted, the same battery performance as conventional products can be exhibited.

[Brief description of drawings]

FIG. 1 is a perspective view of a frame body used in the present invention.

FIG. 2 is a perspective view of a seawater battery according to the present invention.

FIG. 3 is a cell cross-sectional view.

FIG. 4 is a view showing a conventional frame body.

[Explanation of symbols]

 1 Short circuit inspection hole 2 Positive electrode lead wire 3 Negative electrode lead wire 4 Cell 5 Positive electrode 6 Negative electrode 7 Frame (with positive electrode and negative electrode) 8 Adhesive tape 9 Seawater inlet / outlet port

Claims (2)

[Claims] 1. A plurality of cells, in which a positive electrode and a negative electrode are bonded to each other, are laminated on both sides of a frame body, and the side surfaces of the laminated frame body are welded to be integrated with each other. Is provided and the hole for short circuit inspection is closed. 2. A plurality of cells, in which a positive electrode and a negative electrode are joined to each other, are laminated on both sides of a frame body, the side surfaces of the laminated frame body are welded to integrate the plurality of cells, and then the cells are provided on a part of the frame body. A method for producing a seawater battery, comprising inserting a part of a short circuit inspection instrument through the short circuit inspection hole to inspect for the presence of a short circuit, and closing the short circuit inspection hole after the short circuit inspection.