JPH0917461A - Positive / negative plate separation method - Google Patents

Abstract

PURPOSE: To efficiently separate a positive electrode plate and a negative electrode plate without being mixed by cutting the lead part of either one of the positive and negative electrode plates in the state where an electrode part is suspended, and jetting compressed air to drop the cut electrode. CONSTITUTION: The lower part of a cell subjected to cutting is fixed, the upper part 1 is drawn upward, and an electrode part 5 is pulled out and suspended. Of two sets of lead parts 4, 8 connected to a plurality of positive and negative electrode plates constituting the electrode part 5, either one lead part is cut. Then, as an example, a compressed air of 4-6kg/cm<2> is jetted from the outer circumference of the electrode part 5 to drop the cut electrode, whereby the electrode plates can be efficiently separated without being mixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for separating positive and negative plates for efficiently separating and recovering a positive plate and a negative plate from a used metal / hydrogen alkaline secondary battery.

[0002]

2. Description of the Related Art Recently, the problem of air pollution caused by automobile exhaust gas has been widely taken up.
Since 1998, it has been said that there will be a mandatory regulation to sell non-emission vehicles to existing gasoline vehicles at a certain ratio, and it is considered that countries around the world will follow this. As a secondary battery for electric vehicles, nickel-cadmium battery,
Lead-acid batteries have been considered, but metal-hydrogen-alkaline secondary batteries, which are particularly excellent in high power density, long life and high energy density required for electric vehicles, are considered promising. In that case, a large amount of used metal / hydrogen-alkaline secondary batteries will be generated, but since many valuable metals such as nickel are included,
It is important to recycle these used batteries.

Conventionally, as a method of recycling used secondary batteries, the batteries are disassembled, the electrolytic solution is removed, the separator is removed, the electrode plate is taken out, washed with water, neutralized, and dried. Then, there was a method of separating the electrode plate into positive and negative electrodes and separating the active material from each electrode plate.
However, in such a method, when removing the separator, or separating the positive and negative electrode plates, when an external force is applied, the active material falls off from the electrode plate or the separator is damaged,
These constituent parts cannot be completely separated, and if they are to be completely separated, they have to rely on manpower, which causes a cost increase.

[0004]

An object of the present invention is to solve these problems, to efficiently and positively mix the positive electrode plate side and the negative electrode plate side,
It is intended to be completely separated.

[0005]

Means for Solving the Problems The inventors of the present invention have made earnest studies to achieve the above-mentioned object, and as a result, cut the outer case of the battery, lifted the electrode part and took it out, and lifted the electrode part. It was found that the positive and negative electrode plates can be separated by cutting the lead part of either the positive electrode plate or the negative electrode plate with, and blowing the pressurized air to drop the cut electrode plate. Was completed. The cutting of the lead portion may be performed simultaneously with the cutting of the outer case of the battery. In the case of a bag-shaped separator, it can be dropped and separated by blowing pressurized air from the opening of the separator.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments.

Example 1 In disassembling a cell, the outer periphery of the cell outer case at the position shown in FIG. 1 was cut with saw teeth. The lower part of the cell subjected to the cutting treatment was fixed, the upper part was chucked as shown in FIG. 2, pulled up, and the electrode part was extracted and kept in a suspended state. The electrode portion was connected to the upper part of the cell by the lead portion, and one of the two lead portions connected to the plurality of positive and negative electrode plates forming the electrode portion was cut with a saw tooth. In the electrode part, the positive electrode plate and the negative electrode plate are divided into separators and stacked alternately.The electrode plate side where the lead is cut is not cut and the other electrode plate is stuck by the surface tension of the electrolytic solution. Has become.

Therefore, compressed air of 4 to 6 kg / cm 2 is blown from the outer peripheral portion of the electrode portion at an appropriate angle from the tip of the air blowing nozzle at an appropriate angle to loosen both the sticking electrodes and separate them individually. By doing so, the plurality of electrode plates on the side where the leads are cut are all lowered by gravity, and all the electrodes where the leads are not cut remain on the upper part (lid) (FIG. 4). When the separator has a bag shape and the electrode is contained therein, an air blowing nozzle can be positioned above the separator opening, and the separator can be blown off by compressed air to separate the electrode and the separator.

Example 2 In the cell disassembly, of the leads connected to a plurality of positive electrode plates and a plurality of negative electrode plates which form an electrode portion while cutting the outer periphery of the cell outer case at the position shown in FIG. One of the lead parts was cut with a saw tooth. Next, the lower part of the cell was fixed, the upper part was chucked, and it was pulled up, and the electrode part was extracted and kept in a suspended state. After that, by performing the same air blowing process as in Example 1, all of the electrode plates on the side where the leads were cut fell down due to gravity, and all the electrodes where the leads were not cut were on the top (lid). Remain attached to.

[0010]

As described above in detail with reference to the embodiments, the method for separating the positive and negative electrode plates according to the present invention enables the positive electrode plate and the negative electrode plate to be efficiently and completely separated without mixing. This has the effect.

[Brief description of the drawings]

FIG. 1 is a front view and a side view of a single cell. (Schematic)

FIG. 2 is a view showing a method of chucking electrodes.

FIG. 3 is a view showing a method of blowing pressurized air.

FIG. 4 is a view showing a state where the positive and negative electrode plates are separately separated.

FIG. 5 is a view showing a method of cutting one lead portion together with a battery outer case. 1 ... Cell upper part, 2 ... Lower fixing jig, 3 ... Chucking device, 4 ... Lead part, 5 ... Electrode part, 6 ... Cell lower part, 7 ... Air blowing nozzle, 8 ... Cut lead part, 9 ... Drop
Separated electrodes, 10 ... Cutting position, 11 ... Lead section cutting position.

Claims (3)

[Claims] 1. An outer case of a battery is cut, an electrode portion is lifted and taken out, and either the positive electrode plate or the negative electrode plate is cut while the electrode portion is lifted, and a pressurized air is blown to cut it. A method for separating a positive and negative electrode plates, characterized in that the other electrode plate is dropped. 2. A battery outer case and a lead portion of either the positive electrode plate or the negative electrode plate are cut, the electrode portion is lifted and taken out, and pressurized air is blown to drop the cut electrode plate. A method for separating the positive and negative electrode plates. 3. The method for separating the positive and negative electrode plates according to claim 1, wherein pressurized air is blown from the opening of the bag-shaped separator to drop the separator.