JPH06333557A - Liquid injecting device for sealed battery - Google Patents

Abstract

PURPOSE:To provide liquid injecting device capable of preventing the scattering of electrolyte to the circumference of the injection port of a sealed battery. CONSTITUTION:The inner pipe 31 of a double pipe nozzle 3 enclosed by a rubber packing 2 is inserted into an injection port 1 provided on a lid 4, the lower end of the rubber packing 2 is fitted into the recessed part 11 of the injection port 1, and the inside of a battery is exhausted through the space between the outer pipe 32 and inner pipe 31 of the double pipe nozzle 3, and an electrolyte is injected into the battery through the inner pipe 31. Thus, even when the injection is carried out while exhausting the battery inside, the electrolyte scattered to the inner surface of the rubber packing 2 can be prevented from being dropped onto the upper surface of the lid 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid injection device for a sealed battery, and more specifically, a liquid injection device for a sealed battery capable of preventing the electrolyte from scattering around the liquid inlet. It relates to the device.

[0002]

2. Description of the Related Art As a conventional liquid injection device for a sealed battery, there is one as shown in FIG.

In FIG. 2, reference numeral 1 denotes a liquid injection port provided in a lid 4 of a sealed battery, and a rubber packing 2 holding a double pipe nozzle 3 is brought into contact with the periphery of the liquid injection port 1 so that The inside of the battery is exhausted from the liquid injection port 1 through the inner pipe 31 and the outer pipe 32 of the double pipe nozzle 3, and the liquid is injected into the battery through the inner pipe 31. .

A concave portion 11 is formed in the upper portion of the liquid injection port 1, a protrusion 12 is formed so as to surround the concave portion 11, and the rubber packing 2 is brought into contact with the peripheral edge of the protrusion 12.

[0005]

SUMMARY OF THE INVENTION In the above-described conventional sealed battery injection device, when the electrolyte is injected while exhausting the inside of the battery, the electrolyte once injected into the battery is sucked again. There is a problem that the electrolytic solution is scattered on the inner surface of the rubber packing 2, and after the injection is completed, the electrolytic solution drips onto the upper surface of the lid 4 to contaminate the battery.

[0006]

In order to solve the above-mentioned problems, the present invention is to insert an inner tube of a double tube nozzle surrounded by a rubber packing into a liquid injection port of a sealed battery and to The lower end is fitted into the recess of the liquid injection port, the inside of the sealed battery is exhausted through the outer tube and the inner tube of the double-tube nozzle, and the sealed battery is inserted through the inner tube of the double-tube nozzle. It is characterized in that an electrolytic solution is injected into the inside.

[0007]

[Operation] Therefore, according to the present invention, since the lower end of the rubber packing is fitted in the recess of the liquid injection port, even if the injected electrolyte is scattered on the inner surface of the rubber packing, it should be dripped on the upper surface of the lid. There is no.

[0008]

EXAMPLES Examples will be described below.

FIG. 1 is a sectional view of a main part of a sealed battery according to an embodiment of the present invention. Parts having the same functions as those in FIG. 2 are designated by the same reference numerals and the following description will be omitted.

A feature of the present invention is that the lower end of the rubber packing 2 holding the double tube nozzle 3 can be fitted into the recess 11 of the liquid injection port 1 provided in the lid 4 of the sealed battery. .

When the sealed battery is filled with air by using the above-mentioned filling device of the present invention, the electrolytic solution once poured into the battery is sucked again and scattered on the inner surface of the rubber packing 2. However, the electrolytic solution 4 does not drip on the upper surface of the lid 4 after the completion of the injection.

[0012]

As described above, according to the liquid injection device of the sealed battery of the present invention, after the liquid injection is completed, the electrolytic solution does not drop on the upper surface of the lid to contaminate the battery, and the trouble of wiping can be omitted. be able to.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a liquid injection device for a sealed battery according to the present invention.

FIG. 2 is a cross-sectional view of a main part of a conventional liquid injection device for a sealed battery.

[Explanation of symbols]

 1 Injection port 2 Rubber packing 3 Double tube nozzle 4 Lid

Claims (1)

[Claims] 1. A double tube, wherein an inner tube of a double tube nozzle surrounded by a rubber packing is inserted into a liquid injection port of a sealed battery, and a lower end of the rubber packing is fitted into a recess of the liquid injection port. The inside of the sealed battery is exhausted between the outer tube and the inner tube of the nozzle, and the electrolytic solution is injected into the sealed battery through the inner tube of the double-tube nozzle. Liquid injection device for sealed batteries.