JPH05190168A - Electrolyte vacuum pouring and device thereof - Google Patents

Abstract

PURPOSE:To smoothly pour a prescribed quantity of electrolyte by reducing the surface tension by pouring an electrolyte, applying the fine vibration and the cyclic shocks to a battery jar in decompressed state and deaerating the gas foams of the generated gas. CONSTITUTION:A battery jar 2 having an electrode group 1 inserted is fixed on a battery jar fixing tool 11 suspended through a supporting spring 17 by an outside fixing member 16. After the inside of the jar 2 is decompressed by a vacuum pump 7 from a flexible pipe 4 passing through a sealed cover 3, the solenoid valve 8 of a flexible pipe 5 is opened, and an electrolyte 9 is poured. At this time, the surface tension of the liquid 9 is reduced by driving a fine vibrator body 12 such as an electromagnetic vibrator, and the permeation into the electrode group 1 is facilitated. At the same time, a motor 14 is driven to apply a shock to the jar 2 by a cam device 13, and the gas foams generated between the electrode group 1 and the liquid 9 are deaerated, and the apparent volume expansion of the liquid 9 is eliminated, and a prescribed quantity of liquid can be poured efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution vacuum injection method and an apparatus used therefor.

[0002]

2. Description of the Related Art In general, injection of an electrolytic solution into a sealed battery is generally performed after inserting a group of electrodes into a battery case. And, the injection of this electrolytic solution takes a lot of time to penetrate into the electrode group of the electrolytic solution because the density of the electrode group inserted in the battery case is very high, and as a whole, the specified amount of electrolytic solution is introduced. Injection took a long time.

Therefore, conventionally, as a method for quickly injecting a prescribed amount of the electrolytic solution into the battery case, an electrolytic solution vacuum injection method has been adopted in which the electrolytic solution is injected while the pressure inside the battery case is reduced. Explaining such an electrolytic solution vacuum injection method, as shown in FIG. 3, a sealing lid 3 is attached to the opening of the battery case 2 in which the pole group 1 is inserted, and the flexible lid is passed through the sealing lid 3. One of the tubes 4 and 5 is connected to the vacuum pump 7 via the electromagnetic valve 6, and the other of the flexible tubes 4 and 5 is connected via the electromagnetic valve 8 to an electrolysis device containing a fixed amount of the electrolytic solution 9. It is connected to the liquid container 10.

First, the solenoid valve 8 is closed, the solenoid valve 6 is opened, and the vacuum pump 7 is used to remove air so that the battery case 2 is closed.
The inside of the container is depressurized, then the electromagnetic valve 6 is closed and the electromagnetic valve 8 is opened, so that the electrolytic solution 9 in the electrolytic solution container 10 is brought to the atmospheric pressure and the depressurized state in the container 2 by opening the electromagnetic valve 8. Inject using the pressure difference from the atmospheric pressure.

[0005]

However, in such a conventional electrolytic solution vacuum injection method, even though the solution can be injected vigorously at the beginning, the space becomes narrower as the injection amount increases, so that the battery case The internal pressure rises, the pressure difference between it and the atmospheric pressure at which the electrolyte flows is reduced, and the apparent volume may increase due to the generation of gas bubbles in the container during the injection. The problem is that it is not possible to smoothly inject the specified amount of electrolyte solution into the battery case all at once, and it takes a long time to inject the uninjected electrolyte solution into the battery case. was there.

The present invention has been made in view of the above-mentioned problems of the prior art. The microvibration reduces the surface tension of the electrolytic solution to promote the permeation of the electrolytic solution into the electrode group, and at the same time, the impact of a fixed cycle. With the aim of providing an electrolytic solution vacuum injection method and an apparatus used for the same, it is possible to increase the empty volume by degassing the bubbles of the generated gas and smoothly inject a specified amount of the electrolytic solution into the battery case. To do.

[0007]

SUMMARY OF THE INVENTION According to the present invention, after inserting a group of electrodes into a battery case of a sealed battery, the battery container is covered with a sealing lid, the inside of the battery chamber is depressurized by a vacuum pump, and then the electrolytic solution is removed. In the electrolytic solution vacuum injection method of injecting, the electrolytic solution is injected while applying minute vibration to the battery container in the reduced pressure state and periodically applying impact.

Further, the electrolytic solution vacuum injecting apparatus of the present invention comprises a vibrating body on which a decompressed battery case is placed and which gives a microvibration thereto, and a shocking means for periodically shocking the battery container. It is a thing.

[0009]

According to the electrolytic solution vacuum injection method of the present invention, the surface tension of the electrolytic solution becomes small due to the microvibration, and it becomes easy for the electrolytic solution to permeate into the electrode group. The electrolyte can be injected smoothly even if the size is small, and at the same time, by adding a shock to the battery case, the gas bubbles generated between the pole group and the electrolyte can be degassed, The expansion of the apparent volume occupied by the electrolytic solution in the battery case is eliminated, the empty volume is increased, and a prescribed amount of electrolytic solution can be injected quickly.

Further, in the electrolytic solution vacuum injecting device of the present invention,
The micro-vibration body gives micro-vibration to the decompressed battery case,
It is possible to give an impact to the battery case by the impact means, and to reduce the surface tension of the electrolytic solution by microvibration to facilitate penetration into the pole group, and to reduce the differential pressure between the atmospheric pressure and the atmospheric pressure in the battery container. Also makes it easier to inject the electrolyte solution, and at the same time, by applying shock to the battery case, the gas bubbles generated between the electrode group and the electrolyte solution are degassed, and the apparent volume occupied by the electrolyte solution in the battery case is increased. By expanding the empty volume and increasing the empty volume, a specified amount of electrolyte can be injected quickly.

[0011]

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

FIG. 1 shows an example of an apparatus used in the electrolytic solution vacuum pouring method of the present invention, and shows an example of the electrolytic solution vacuum pouring apparatus of the present invention.

In the electrolytic solution vacuum injecting device of this embodiment, reference numerals 1 to 10 are common to the structure shown in FIG. In addition, in this embodiment, a microvibration body 12 that gives a microvibration, such as an electromagnetic vibrator, is attached to a battery case fixture 11 that supports and fixes the battery case 2 in a decompressed state, and a cam is provided below the battery case fixture 11. Place the device 13,
The cam device 13 is rotationally driven by a motor 14 periodically.

The vibration cycle of the microvibration body 12 and the shock cycle of the cam device 13 as the shock means are as shown in FIG.

Both sides of the battery case fixing tool 11 are guided by a guide 15 so as to be able to move up and down, and are suspended and supported by the other end of a support spring 17 whose one end is connected to an external fixing member 16. There is.

Next, the operation of the above-mentioned electrolytic solution vacuum pouring device will be described, which is also an explanation of an embodiment of the electrolytic solution vacuum pouring method of the present invention.

First, as shown in FIG. 1, the external fixing member 16 is provided.
Thus, the battery case 2 in which the pole group 1 is inserted is fixedly supported on the battery case fixture 11 suspended and supported by the support spring 17.

Then, a sealing lid 3 is attached to the opening of the battery case 2, and one of the flexible tubes 4 and 5 is connected to the vacuum pump 7 through the electromagnetic valve 6 through the sealing lid 3. The other of the flexible tubes 4 and 5 is connected via an electromagnetic valve 8 to an electrolytic solution container 10 containing a fixed amount of electrolytic solution 9.

In this state, the solenoid valve 8 is first closed,
The electromagnetic valve 6 is opened, air is evacuated by the vacuum pump 7 and the inside of the battery case 2 is depressurized, and then the electromagnetic valve 6 is closed.
By driving a minute vibrator 12 such as an electromagnetic vibrator, the battery case 2 is transferred to the battery case 2 via the battery case fixture 11.
The electromagnetic valve 8 is opened while applying a minute vibration as shown in (a). As a result, the electrolytic solution 9 in the container 10 is vigorously injected into the battery case 2 in the depressurized state due to the differential pressure between the atmospheric pressure and the air pressure in the depressurized state in the battery case 2. .

At this time, the minute vibrator 1 is placed in the battery case 2.
Since the microvibration due to 2 is applied, the surface tension of the electrolytic solution is lowered, the permeation into the pole group 1 is facilitated, and most of the prescribed amount of electrolytic solution 9 is smoothly injected. ..

Although gas bubbles are generated between the pole group 2 and the electrolytic solution by the injection of the electrolytic solution 9, the cam device 13 is rotated by driving the motor 14, and the cam device 13 is rotated.
The rotation causes the battery case to be given a shock through the battery case fixture 11 in a cycle as shown in FIG. 2 (b).

In this case, since the battery case fixture 11 is suspended and supported by the external fixing member 16 by the support spring 17, the cam device 13 is rotated to receive the pressing force by the compression and opening of the spring 17, and the battery case 2 Can be given a drop impact of more than that weight, so that gas bubbles generated inside the battery case 2 can be surely degassed, and only the degassed bubbles of the electrolytic solution can be transferred to the pole group 1. It can be permeated, the apparent volume occupied by the electrolytic solution injected into the battery case 2 can be reduced, and the empty volume can be increased accordingly, and the electrolytic solution remaining in the electrolytic container 10 can be transferred to the battery case. It becomes possible to make additional injection into 2.

It should be noted that the prescribed amount of electrolyte and the time required for the electrolyte to be injected vary greatly depending on factors such as the size of the battery case, the size of the pole group, and the concentration of the electrolyte, and the cam device 13
It is necessary to experimentally determine the rotation speed of the battery, but it can be set so that the impact is generated a few times or more during the injection of the specified amount of the electrolytic solution into one battery case.

In the embodiment of the present invention, the electromagnetic vibrator is used as the microvibrating body, but it is not particularly limited as long as it can generate the microvibration. Further, as the impact means, not only the cam device but also other appropriate means can be used.

[0025]

As described above, according to the electrolytic solution vacuum injection method of the present invention, after inserting the electrode group into the battery case of the sealed battery,
When the electrolytic solution is injected after depressurizing the inside of the electrolytic cell, a small vibration is applied to the decompressed electrolytic cell and the electrolytic solution is injected while periodically applying shock. Since the microvibration reduces the surface tension of the electrolyte and makes it easier for the electrolyte to permeate into the pole group, the electrolyte can be injected smoothly even if the pressure difference between the atmospheric pressure and the pressure inside the battery case is small. At the same time, by applying an impact to the battery case, the gas bubbles generated between the electrode group and the electrolytic solution can be degassed, and the apparent volume expansion of the electrolytic solution in the battery tank can be expanded. By eliminating it and increasing the empty volume, a specified amount of electrolyte can be injected efficiently.

Further, according to the electrolytic solution vacuum injecting apparatus of the present invention, it is possible to apply a microvibration to the decompressed battery container by the microvibrating body and to give a shock to the battery container by the impact means.
The microvibration reduces the surface tension of the electrolyte to facilitate penetration into the pole group, making it easier to inject the electrolyte even if the differential pressure between the atmospheric pressure and the atmospheric pressure in the battery case is small, and at the same time to reduce impact. By adding it to the battery case, the gas bubbles generated between the electrode group and the electrolyte are degassed to eliminate the apparent volume expansion of the electrolyte in the battery and increase the empty volume to a specified amount. Be able to efficiently inject the electrolyte solution.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a timing chart showing an application cycle of microvibration and impact in the above embodiment.

FIG. 3 is a front view of a conventional example.

[Explanation of symbols]

 1 pole group 2 battery case 3 sealing lid 4,5 flexible tube 6 solenoid valve 7 vacuum pump 8 solenoid valve 9 electrolyte solution 10 electrolyte solution container 11 battery case fixture 12 microvibrating body 13 cam device 14 motor 15 guide 16 externally fixed Member 17 Support spring

Claims (2)

[Claims] 1. After inserting the pole group into the battery case of the sealed battery,
In the electrolytic solution vacuum injecting method, in which the electrolytic tank is decompressed with a vacuum pump and then the electrolytic solution is injected, a microvibration is applied to the decompressed battery case and a periodic shock is applied. A method for injecting an electrolytic solution vacuum, which comprises injecting an electrolytic solution while adding. 2. An electrolytic solution vacuum pouring device comprising a vibrating body on which a battery case is placed and which imparts minute vibrations thereto, and a shocking means for periodically shocking the battery case.