JPH07262983A - Liquid filling joint - Google Patents

Abstract

PURPOSE:To obtain a liquid filling joint, which can fill the electrolyte in a cylindrical container of a secondary battery or the like with a vacuum pressurizing method by forming the structure, which has a high sealing property and with which connection/disconnection is facilitated. CONSTITUTION:A base member 2, a sealing elastic material 3, which is fitted to one surface side of the base member 2 and which contacts with the peripheral surface of an opening of a container to be filled with liquid, a wedge-like block 17 for deforming the elastic material 3 to adhere it to the peripheral surface of the opening part, and a cylinder piston 5 for driving the block 17 are provided. The elastic material 3 can be adhered to the peripheral surface of the opening part of the container for adhesive connection and this adhesive connection can be easily cancelled by driving the cylinder piston 5 to move the block 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid injection joint suitable for injecting a liquid such as an electrolytic solution into a cylindrical container such as a secondary battery.

[0002]

2. Description of the Related Art Some secondary batteries have a structure in which a coil is wound around an electrode and placed in a container, and an electrolytic solution is injected into the container. In this case, when the electrolytic solution is injected, bubbles often remain around the coil and the electrolytic solution does not spread to every corner of the coil.
Therefore, in a small battery or the like, when injecting an electrolytic solution, a so-called vacuum pressurization method is adopted in which the entire battery is placed in a vacuum container and the electrolytic solution is pressurized and injected. However, in the case of a large-sized battery, such a vacuum pressurizing method is not adopted because the device becomes large-sized, and it is performed in the atmosphere. For this reason, it takes time to eliminate the air bubbles staying around the coil and to reach a state in which the electrolytic solution reaches every corner of the coil.

[0003]

As described above, in the case of injecting the electrolytic solution in the large-sized battery, since it is performed in the atmosphere, the electrolytic solution may not reach all the coils. There was a problem that it took time.
Therefore, there has been a demand for a method in which a vacuum pressurization method can be adopted with a simpler device than before.

The present invention has been made in view of the above problems, and an object thereof is to provide a high sealing property and a structure which can be easily attached / detached so that a tubular container for a secondary battery or the like can be provided. Another object of the present invention is to provide a liquid injection joint capable of injecting an electrolytic solution by a vacuum pressure method. Furthermore, other purposes will be clarified one after another in the content described below.

[0005]

According to the present invention, there is provided a liquid injection joint which is detachably attached to a cylindrical opening of a container into which a liquid is injected. An elastic material for sealing, which is attached to one surface side of the member and is in contact with the peripheral surface of the opening of the container, a wedge-shaped block which deforms the elastic material to adhere to the peripheral surface of the opening, and the block. It is achieved by a structure including a moving cylinder and piston.

[0006]

According to this, when the cylinder / piston is driven to move the block, the movement of the block brings the elastic material into close contact with the peripheral surface of the opening portion of the container for close connection, and the close connection can be easily performed. It can be canceled.

[0007]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 4 show an embodiment of a liquid injection joint according to the present invention. FIG. 1 is a longitudinal side view thereof, FIG. 2 is a top view thereof, FIG. 3 is a bottom view thereof, and FIG. FIG.

In FIGS. 1 to 4, the joint 1 is
Broadly, it is composed of a base member 2, a sealing elastic material 3, an actuator 4, a cylinder / piston 5, and the like.

More specifically, the base member 2 is preferably made of metal and has a disk shape. Further, a disc-shaped raised portion 6 having a thickness larger than that of the other is integrally formed on one surface side (the upper surface side in this embodiment) of the base member 2, and the raised portion 6 has a cylindrical shape at the center thereof. The cylinder part 5A is made. A hole 7 communicating with the peripheral surface of the base member 2 is formed on the bottom surface of the cylinder portion 5A.
A pipe 8 on the side of the air compressor (not shown) is connected, and air as a pressure fluid is supplied and discharged through the pipe 8 and the hole 7. Further, the base member 2 has a cylinder portion 5 on the raised portion 6.
A plurality of (four in this embodiment) guide holes 9 are formed vertically through the circumference of the circle drawn around A at substantially equal intervals, and ring-shaped bushes are formed in the guide holes 9. Two 10s are arranged vertically apart from each other. in addition,
The base member 2 is provided with a liquid injection hole 11 having one opening on the bottom surface of the base member 2 and the other opening on the peripheral surface of the base member 2.
2 is connected. This pipe 12 is connected to an exhaust device when the inside of the battery container to be described later is evacuated, and is connected to the electrolytic solution injector side when injecting the electrolytic solution. This switching is automatically performed by a switcher (not shown). Is switched to.

The elastic member 3 for sealing is formed as a ring-shaped disc with its center being hollowed out, preferably made of a rubber material. Further, holes 13 penetrating vertically are formed at positions corresponding to the guide holes 9, and the liquid injection holes 11 are formed.
Similarly, a hole (not shown) that penetrates vertically is formed at a position corresponding to. Further, the lower end side of the hole 13 has a state in which the inner diameter gradually increases as it goes downward,
It is formed as a tapered surface 13a.

The actuator 4 has a hole 13 in the elastic member 3.
And a rod 15 penetrating the guide hole 9 of the base member 2 in common and slidably held in the guide hole 9 via a bush 10, and a block fixed to the lower end side of the rod 15 with a bolt 16. It is composed of 17 and. In addition,
A part of the outer peripheral surface of the block 17 is a tapered surface 1 of the hole 13.
It is formed as a tapered surface 17a corresponding to 3a, and a part of this tapered surface 17a is inserted into the hole 13 and attached.

The cylinder / piston 5 constitutes a driving means, and is composed of the cylinder portion 5A formed on the base member 2 and the piston portion 5B arranged in the cylinder portion 5A. . An O-ring 18 is attached to the outer periphery of the piston portion 5B, and the piston portion 5B is slidably disposed in the cylinder portion 5A so as to have a sealing property with the inner surface of the cylinder portion 5A. The one end side of the piston portion 5B protruding from the cylinder portion 5A is parallel to the upper surface of the base member 2 and has a collar portion 19a.
Are integrally provided, and four attachment holes 20 respectively corresponding to the guide holes 9 are formed in the collar portion 19. Then, the upper end side of the rod 15 protruding through the guide hole 9 is inserted into the mounting hole 20, and the upper end side of the rod 15 is connected via the bolt 21 to the collar portion 1.
It is fixed at 9. When the upper end side of the rod 15 is fixed to the collar portion 19 in this way, the elastic member 3 is also attached to the base member 2 via the rod 15.

That is, in the structure of the cylinder / piston 5 constructed as described above, when air is supplied into the cylinder portion 5A through the hole 7, the piston portion 5B moves upward, and when air is released, it returns downward. The actuator 4 is also moved together with the movement of the piston portion 5B. When the piston portion 5B is moved downward as shown in FIG. 1 without supplying air into the cylinder portion 5A, the taper surface 17a of the block 17 is loosely contacted with the taper surface 13a of the hole 13. When the piston portion 5B is moved upward as shown in FIG. 4 by being supplied with air into the cylinder portion 5A, the block 17 has the tapered surface 17a biting into the hole 13 and the taper The elastic member 3 is deformed in the horizontal direction via the surface 13a.

Next, the operation of the liquid injection joint 1 will be described by taking as an example the case of injecting an electrolytic solution into the container of a cylindrical secondary battery. First, as shown in FIG. 4, a container 20 of a secondary battery has an outer cylinder 20a of the battery and an inner tube 20b of an electrode terminal for heat dissipation, and a double-formed opening is formed on the same surface. It is in the state of being The inner diameter of the outer cylinder 20a is formed to be slightly larger than the outer diameter of the elastic material 3, and the outer diameter of the inner cylinder 20b is formed to be slightly smaller than the inner diameter of the elastic material 3. Therefore, when air is not supplied into the cylinder portion 5A, the elastic member 3 can be easily inserted and arranged between the inner cylinder 20b and the outer cylinder 20a. 1 is set in the container 20.

Next, air is supplied into the cylinder portion 5A through the hole 7. Then, the piston portion 5B moves upward together with the actuator 4. In addition, the block 17 bites into the hole 13 by this movement, causing the elastic member 3 to deform in the horizontal direction. As a result, the outer peripheral surface of the elastic material 3 comes into close contact with the inner peripheral surface of the outer cylinder 20a, and the inner peripheral surface of the elastic material 3 comes into close contact with the outer peripheral surface of the inner cylinder 20b.
The opening portion of is sealed. FIG. 4 shows this state.

Next, using the pipe 12 connected to the liquid injection hole 11, the air in the container 20 is evacuated to a vacuum to completely eliminate the air present in the coil space (not shown). Then, the same pipe 12 is used to pressurize and inject the electrolytic solution into the container 20. Thereby, in the atmosphere, the container 20
It becomes possible to inject the electrolytic solution into the inside by a vacuum pressurization method.
Further, after injecting a predetermined amount of the electrolytic solution in this way, the air in the cylinder portion 5A is evacuated. Then, the piston portion 5B moves downward together with the actuator 4, and the bite of the block 17 into the elastic material 3 is released, whereby the elastic material 3 is not deformed and the liquid injection joint 1 can be removed from the container 20. . Then, a new container 20 is prepared again and the electrolytic solution is injected in the same manner. Meanwhile, the container 20
The battery that has been injected into the inside is sent to the next step for processing.

Therefore, according to the liquid injection joint 1 of this embodiment, when the cylinder / piston 5 is driven to move the block 17, the elastic material 3 is moved by the movement of the block 17 to the peripheral surface of the opening of the container 20, That is, the outer cylinder 20
It is possible to make a close contact with a and the inner cylinder 20b for a tight connection, or to easily release the close connection. Then, if the container 20 is evacuated in a tightly adhered state and the electrolytic solution is injected under pressure, injection by a vacuum pressurization method can be easily realized, and when used for injecting an electrolytic solution into a battery, The cost of the battery can be reduced.

In the above-mentioned embodiment, the case where the secondary battery is used for injecting the electrolytic solution has been described.
It can also be used as a joint when injecting a liquid other than this.

[0019]

As described above, according to the present invention,
When the block is moved by driving the cylinder / piston, the elastic material can be brought into close contact with the peripheral surface of the opening of the container by the movement of the block to be tightly connected, or the close connection can be easily released. Therefore, if the inside of the container is evacuated and the electrolyte is pressure-injected in the state of being in close contact, the injection by the vacuum pressurization method can be easily realized. Therefore, when this joint is used for an electrolyte injection device in a secondary battery, the injection time can be significantly shortened, and at the same time, the cost can be reduced and the secondary battery can be provided at low cost. Can be expected.

[Brief description of drawings]

FIG. 1 is a vertical side view showing an embodiment of a liquid injection joint according to the present invention.

FIG. 2 is a top view of the same joint according to the present embodiment.

FIG. 3 is a bottom view of the above joint according to the present embodiment.

FIG. 4 is a vertical cross-sectional side view showing an operating state of the same joint according to the present embodiment.

[Explanation of symbols]

 1 Joint 2 Base Member 3 Elastic Material 4 Actuator 5 Cylinder / Piston (Driving Means) 5A Cylinder Part 5B Piston Part 15 Rod 17 Block 20 Container 20a Outer Cylinder 20b Inner Cylinder

Claims (4)

[Claims] 1. A liquid injection joint removably attached to a cylindrical opening of a container into which liquid is injected, the base member being attached to one surface side of the base member, and the opening of the container. An injecting liquid, comprising: an elastic material for sealing, which is in contact with a peripheral surface; a wedge-shaped block that deforms the elastic material to make close contact with the peripheral surface of the opening; and a cylinder / piston that moves the block. For joints. 2. A liquid injection joint for sealingly and removably attaching each opening of a container having a doubled opening on the same surface, the joint being formed in a ring shape with a base member. An elastic material for sealing, which is attached to one surface side of the base member, an inner peripheral surface of which is in contact with an outer circumference of the inner opening and an outer circumference of which is in contact with an inner circumference of the outer opening, and the elastic material is deformed. A liquid injection joint, comprising: a wedge-shaped block for adhering the peripheral surfaces corresponding to the peripheral surfaces of the openings to each other, and a cylinder / piston for moving the block. 3. A liquid injection joint for sealingly and removably attaching each opening of a container having a doubled opening on the same surface, which is formed in a substantially ring shape with a base member. An elastic material for sealing which is attached to one surface side of the base member, an inner peripheral surface of which is in contact with an outer periphery of the inner opening and an outer periphery of which is in contact with an inner periphery of the outer opening, the base member and the A rod portion slidably attached through the elastic material and a rod portion fixed to the rod portion on the side where the elastic material is disposed and attached so as to be integrally movable, and with the rod portion. An actuator having a wedge-shaped block portion that is bited into the elastic material by sliding to deform the elastic material, and bring the peripheral surfaces of the elastic material corresponding to the peripheral surfaces of the openings into close contact with each other; A cylinder formed on the base member and slidably arranged in the cylinder and operated by pressure fluid or the like,
A joint for injecting liquid, comprising a piston for sliding the rod portion and a driving means having the piston. 4. An outer tube having an electrode and an inner tube for heat dissipation inside, and each opening of a battery container having a doubled opening on the same surface is sealed, and the outer tube and the outer tube are sealed together. A liquid injection joint that is detachably attached to an inner tube to inject an electrolyte, and is formed in a substantially ring shape with a base member and is attached to one surface side of the base member. An elastic member for sealing, the inner peripheral surface of which is in contact with the outer peripheral surface of the opening and the outer peripheral surface of which is in contact with the inner peripheral surface of the outer opening, and the elastic material is deformed to correspond to the peripheral surfaces of the respective openings. A liquid injection joint, comprising: a wedge-shaped block for closely contacting a peripheral surface of an elastic material; and a cylinder / piston for moving the block.