KR-20260063717-A - Electrolyte injection device for secondary battery using individual vacuum method

KR20260063717AKR 20260063717 AKR20260063717 AKR 20260063717AKR-20260063717-A

Abstract

The present invention relates to an individual vacuum type secondary battery electrolyte injection device capable of injecting electrolyte by forming a vacuum inside an individual battery cell, comprising: a battery cell capable of charging electrolyte through an injection port; a support frame; a first lifting member provided to be vertically movable on the support frame; a second lifting member mounted on and interlocked with the first lifting member and formed to be vertically movable on the first lifting member; an injection alignment member mounted in front of the first lifting member and vertically movable, having an injection guide hole penetrating vertically through the interior and a vacuum guide hole branching off to one side from the injection guide hole, wherein the injection port is in close contact with the injection guide hole in an aligned state; and an injection port mounted in front of the second lifting member and vertically movable, wherein the lower end is mounted on the injection guide hole, the vacuum guide hole is opened and closed through vertical movement, and the injection nozzle at the lower end is inserted into the injection port while the vacuum guide hole is closed upon downward movement. The technical feature comprises: a liquid connector connected to one side of the upper portion of the liquid inlet and supplying an external electrolyte to the injection nozzle through the interior of the liquid inlet; and a vacuum connector mounted on the liquid inlet to communicate with the vacuum guide hole and forming a vacuum state by discharging air and gas inside the battery cell through a vacuum pump formed externally.

Inventors

김경민
심관섭

Assignees

(주)에스알테크

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (4)

A battery cell capable of charging electrolyte through an inlet; Support frame; A first lifting member provided to be vertically movable on the above support frame; A second elevator that is mounted on and interlocked with the first elevator and is formed to be able to move up and down on the first elevator; A liquid alignment member mounted in front of the first lifting member and raised and lowered, having a liquid guide hole penetrating the interior in a vertical direction and a vacuum guide hole branching off to one side from the liquid guide hole, wherein the injection port is in close contact with the liquid guide hole in a state of alignment; A liquid inlet mounted in front of the second lifting port and raised and lowered, wherein the lower end is mounted in the liquid injection guide hole and opens and closes the vacuum guide hole through raising and lowering, and the injection nozzle at the lower end is inserted into the injection port while the vacuum guide hole is closed when lowered; A liquid connector connected to one side of the upper portion of the liquid inlet and providing an external electrolyte through the interior of the liquid inlet to the injection nozzle; and An individual vacuum type secondary battery electrolyte injection device characterized by comprising: a vacuum connector that forms a vacuum state by discharging air and gas inside the battery cell through a vacuum pump formed externally and mounted at the liquid inlet so as to communicate with the vacuum guide hole.
In paragraph 1, The above-mentioned liquid alignment section is, A lifting body mounted in front of the first lifting port, which moves up and down in conjunction with the first lifting port, and having a liquid injection guide hole penetrating the interior in a vertical direction and a vacuum guide hole branching off to one side from the liquid injection guide hole; A first pipe body formed on the upper part of the above-mentioned injection guide hole and having a first movable pipe formed therein that communicates with the vacuum connector; and An individual vacuum type secondary battery electrolyte injection device characterized by comprising: a second tube body extending from the lower end of the first tube body and having a second movable tube formed therein with a diameter smaller than that of the first movable tube.
In paragraph 2, The above liquid inlet is, A mounting body mounted in front of the second lifting port, which moves up and down in conjunction with the second lifting port, and has a mounting groove formed in the vertical direction; A liquid injection body that is inserted into the mounting groove and has the liquid connector connected to one side to allow external electrolyte to move along the inside; An injection nozzle mounted at the bottom of the injection body and configured to communicate with the injection body to eject the electrolyte; and An individual vacuum type secondary battery electrolyte injection device characterized by comprising: a pipe converter mounted at the bottom of the injection nozzle and configured to correspond to the diameter of the second pipe body, which moves between the first moving pipe and the second moving pipe through lifting and closing the vacuum connection port.
In paragraph 3, An individual vacuum type secondary battery electrolyte injection device characterized by further forming an elastic body that is provided between the mounting groove and the injection body and elastically supports the injection body.

Description

Electrolyte injection device for secondary battery using individual vacuum method The present invention relates to an individual vacuum type secondary battery electrolyte injection device capable of injecting electrolyte by forming a vacuum inside an individual battery cell. As the use of portable electric products such as video cameras, mobile phones, and portable PCs becomes more widespread, the importance of secondary batteries, which are primarily used as their power source, is increasing. If the electrolyte is incompletely injected into the electrode assembly of such a secondary battery, the capacity of the secondary battery may decrease, the non-uniformity of the electrode condition may worsen leading to stability problems, and the degradation of the electrode may accelerate, thereby shortening the lifespan of the secondary battery. The conventional electrolyte injection method involved placing multiple battery cells into the entire chamber simultaneously, creating a vacuum in the chamber, and then injecting the electrolyte. As such, the conventional vacuum chamber electrolyte injection method makes it easy to apply consistent conditions since all battery cells are processed in the same environment, but it presents difficulties in customized processing tailored to the characteristics of individual battery cells. In particular, situations often occurred where a problem with an individual battery cell could affect other battery cells. In addition, since air and gas inside the battery cell are discharged and external electrolyte is injected into the battery cell through a single nozzle, there is a problem in that the electrolyte remaining in the nozzle may flow into the vacuum pump when a vacuum is created, potentially causing the device to malfunction. FIG. 1 is an overall shape diagram of an individual vacuum type secondary battery electrolyte injection device according to the present invention. FIG. 2 is a cross-sectional view illustrating the creation of a vacuum state by the rising of the second lifting port of an individual vacuum type secondary battery electrolyte injection device according to the present invention. FIG. 3 is a cross-sectional view illustrating the electrolyte injection state according to the lowering of the second lifting port of an individual vacuum type secondary battery electrolyte injection device according to the present invention. The present invention relates to an individual vacuum type secondary battery electrolyte injection device capable of injecting electrolyte by forming a vacuum inside an individual battery cell. The technical features include the ability to inject electrolyte into individual battery cells, enabling rapid electrolyte injection by creating a vacuum inside the battery cells before injecting the electrolyte, and separately forming an electrolyte injection nozzle and an air vent for creating a vacuum inside the battery cells to prevent electrolyte from entering the vacuum pump and to prevent the mixing of the electrolyte remaining in the injection nozzle with new electrolyte supplied from the outside. FIG. 1 is an overall shape diagram of an individual vacuum type secondary battery electrolyte injection device according to the present invention, FIG. 2 is a cross-sectional view for explaining the creation of a vacuum state by the rising of the second lifting port of the individual vacuum type secondary battery electrolyte injection device according to the present invention, and FIG. 3 is a cross-sectional view for explaining the electrolyte injection state by the lowering of the second lifting port of the individual vacuum type secondary battery electrolyte injection device according to the present invention. Hereinafter, embodiments of the present invention having the aforementioned features will be described in more detail with reference to the attached drawings. The individual vacuum type secondary battery electrolyte injection device according to the present invention is a device for charging an electrolyte through an injection port (10) of a battery cell (C), and is largely composed of a support frame (100), a first lifting port (200), a second lifting port (300), an injection alignment port (400), an liquid inlet port (500), a liquid connector (600), and a vacuum connector (700). The support frame (100) is positioned vertically from the ground and is configured to have a predetermined height. The first lifting port (200) is provided to be able to be raised and lowered on the support frame (100). At this time, the lifting of the first lifting port (200) is driven by a cylinder (not shown) operated by a motor (not shown) to move the first lifting port (200) up and down. The second elevator (300) is mounted on the first elevator (200) and is linked to it, and is formed to be able to move up and down on the first elevator (200). In addition, the second lifting port (300), like the first lifting port (200), has a cylinder (not shown) operated by a moto