KR-20260062437-A - Battery Cell Manufacturing Apparatus And Controlling Method Of The Same

KR20260062437AKR 20260062437 AKR20260062437 AKR 20260062437AKR-20260062437-A

Abstract

The present disclosure relates to a battery cell manufacturing apparatus for manufacturing a battery cell comprising: a case for housing an electrode assembly; an injection port penetrating one surface of the case; and a sealing member coupled to the case to cover the injection port, wherein the apparatus comprises: an insertion unit for inserting the sealing member into the injection port; and a fusion unit for contacting the sealing member inserted into the injection port and fusing the sealing member to the case. The invention also relates to a method for controlling the same.

Inventors

배재성

Assignees

에스케이온 주식회사

Dates

Publication Date: 20260507
Application Date: 20241029

Claims (15)

A battery cell manufacturing apparatus for manufacturing a battery cell comprising a case accommodating an electrode assembly, a liquid injection port penetrating one surface of the case, and a sealing member coupled to the case to cover the liquid injection port, wherein A battery cell manufacturing apparatus comprising: a fusion unit including a heater portion that heats the sealing member by contacting the sealing member inserted into the injection port.
In paragraph 1, The above heater part Battery cell manufacturing device in the form of a thin-film heater.
In paragraph 1, The above fusion unit is A fusion housing including a receiving opening opened on one side and surrounding the sealing member through the receiving opening; and A battery cell manufacturing apparatus further comprising: a pipe-shaped fusion pipe that is inserted through the fusion housing and moves the heater part located on the lower side to contact the sealing member.
In paragraph 3, The above fusion unit is A battery cell manufacturing apparatus further comprising a pressure reducing unit that discharges gas from inside the case through the fusion pipe at a pressure lower than the internal pressure of the case.
In paragraph 1, The above heater part A battery cell manufacturing apparatus that heats the sealing member for a preset elapsed time so that at least a portion of the sealing member is deformed to form a fused portion between the case and the sealing member.
In paragraph 1, A battery cell manufacturing device further comprising a fixing jig for fixing the position of the battery cell.
In paragraph 1, A battery cell manufacturing apparatus further comprising an insertion unit for inserting the sealing member into the injection port.
In Paragraph 7, The above insertion unit is A supply unit that supplies the above sealing member; A guide member that guides the sealing member supplied through the supply member to the injection port; and A battery cell manufacturing apparatus comprising: a pressurizing part that pressurizes the sealing member guided to the injection port by the guide part and inserts the sealing member into the injection port.
In paragraph 8, The above pressurized part A battery cell manufacturing device that inserts the above-mentioned sealing member into the above-mentioned injection port in a press-fit manner.
A control method for a battery cell manufacturing apparatus comprising: an insertion unit for manufacturing a battery cell comprising a case accommodating an electrode assembly, a liquid injection port penetrating one surface of the case, and a sealing member coupled to the case to cover the liquid injection port, and a fusion unit comprising a heater unit that contacts and heats the sealing member. A step of inserting the sealing member into the injection port through the insertion unit; and A control method for a battery cell manufacturing apparatus comprising the step of fusing the sealing member inserted into the injection port with the fusion unit and joining it to the case.
In Paragraph 10, The step of inserting the sealing member is A control method for a battery cell manufacturing apparatus comprising a supply unit for supplying the sealing member, a guide unit for guiding the supplied sealing member to the injection port, and a pressurizing unit for pressurizing the sealing member guided to the injection port by the guide unit, wherein the sealing member is inserted into the injection port through the pressurizing unit.
In Paragraph 11, The step of inserting the sealing member is A control method for a battery cell manufacturing device that inserts the sealing member by a press-fit method through the above-mentioned pressurizing part.
In Paragraph 10, The step of fusing the sealing member to join it to the case A control method for a battery cell manufacturing apparatus comprising a welding unit including a welding housing including a receiving opening opened on one side, and a pipe-shaped welding pipe that is movable so that a heater part located on the lower side is inserted through the welding housing and contacts the sealing member, wherein the welding unit further comprises a welding step of heating the sealing member through the heater part in contact with the sealing member to weld it to the case.
In Paragraph 13, The step of fusing the sealing member to join it to the case Prior to the above welding step, a moving step of bringing the welding housing into contact with the one surface of the case while the welding housing wraps around the sealing member through the receiving opening; and A control method for a battery cell manufacturing apparatus further comprising a depressurization step of moving the fusion pipe to contact the sealing member and discharging air inside the case through the fusion pipe.
In Paragraph 11, A control method for a battery cell manufacturing apparatus, comprising, after the step of fusing the sealing member to the case, the step of assembling the sealing cover to the case so that the sealing cover surrounds the sealing member fused to the case.

Description

Battery Cell Manufacturing Apparatus and Controlling Method of the Same The present disclosure relates to a battery cell manufacturing apparatus and a method for controlling the same. More specifically, it relates to a battery cell manufacturing apparatus and a method for controlling the same that improves the sealing force of a sealing member sealing a liquid injection port of a battery cell. Battery cells (or secondary batteries) require a process of injecting electrolyte into the case. To this end, conventional battery cells include an injection port for electrolyte injection. Conventional battery cells undergo a process of injecting electrolyte through the port, degassing, and then inserting a pin or ball into the port to prevent moisture from entering. In this process, the pin or ball is press-fitted into the port to close it. However, the aforementioned pins or balls may be damaged due to various causes, which presents a problem of being prone to leakage. Additionally, because the relative size of the pins or balls is small and the quantity is large, it may be difficult for an operator or detection device to inspect for defects in the pins or balls. FIG. 1 is an example of a battery cell manufactured by a battery cell manufacturing apparatus according to the present disclosure. FIG. 2 is a disassembled view of an example of a battery cell manufactured by a battery cell manufacturing apparatus according to the present disclosure. FIG. 3 is another example of a battery cell manufactured by a battery cell manufacturing apparatus according to the present disclosure. Figure 4 is an enlarged view of the injection portion. FIGS. 5(a) to 5(c) illustrate a method of combining a sealing member and a sealing cover when the sealing member is in the shape of a pin. FIGS. 6(a) to 6(c) illustrate a method of combining a sealing member and a sealing cover when the sealing member is in the shape of a ball. Figure 7 illustrates a method of placing a sealing member in an injection port through an insertion unit. Figure 8 illustrates a method of inserting a sealing member into an injection port through a pressurizing part. FIG. 9 illustrates an example of wrapping a sealing member through a fusion unit. FIG. 10 illustrates an example of heating a sealing member through a heater and joining it to a case. FIG. 11 illustrates a control block diagram of a battery cell manufacturing apparatus according to the present disclosure. FIG. 12 is a flowchart illustrating an example of a control method for a battery cell manufacturing apparatus according to the present disclosure. Preferred embodiments according to the present disclosure are described in detail below with reference to the attached drawings. The configuration of the device or the control method described below are intended only to explain the embodiments according to the present disclosure and are not intended to limit the scope of the rights according to the present disclosure; reference numbers used identically throughout the specification indicate identical components. Specific terms used in this specification are for convenience of explanation only and are not intended to limit the exemplified embodiments. For example, expressions such as "identical" and "to be identical" indicate not only a strictly identical state, but also a state where tolerances or differences exist in the degree to which the same function is obtained. For example, expressions indicating relative or absolute arrangements, such as "in a certain direction," "along a certain direction," "parallel," "perpendicular," "to the center," "concentric," or "coaxial," not only strictly represent such arrangements but also indicate a state of relative displacement with respect to tolerances or angles or distances to which the same function is obtained. To explain the present disclosure, the following description is based on a spatial orthogonal coordinate system formed by mutually orthogonal X, Y, and Z axes. Unless otherwise noted, the Z direction refers to the height direction, and the X direction (or first direction) refers to any one of the directions perpendicular to the height direction. The Y direction (or second direction) refers to the direction perpendicular to the Z direction and the X direction. However, the X, Y, and Z directions mentioned below are intended to explain the present disclosure so that it may be clearly understood, and it goes without saying that each direction may be defined differently depending on where the reference is placed. The use of terms such as ‘first, second, third’ preceding the components mentioned below is intended solely to avoid confusion regarding the components being referred to, and is unrelated to the order, importance, or master-subordinate relationship between the components. For example, an invention including only the second component without the first component can also be implemented. As used in this specification, singular expressions include plural e