WO-2026095385-A1 - POUCH CELL ASSEMBLY

WO2026095385A1WO 2026095385 A1WO2026095385 A1WO 2026095385A1WO-2026095385-A1

Abstract

The present invention relates to a pouch cell assembly characterized by comprising: a battery cell including an electrode assembly, an electrode lead electrically connected to the electrode assembly, and a battery case which is sealed at the edges and covers the electrode assembly so that the electrode lead is drawn out to the outside; and a clamp unit having a clip shape and inserted into the battery case and fixed to the battery cell, wherein the clamp unit presses the battery case corresponding to a portion from which the electrode lead is drawn out.

Inventors

KO, HYUNG HO
Chang, Hyuk Kyun
LEE, JOO HYEONG

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260507
Application Date: 20250930
Priority Date: 20241029

Claims (10)

A battery cell comprising an electrode assembly, an electrode lead electrically connected to the electrode assembly, and a battery case covering the electrode assembly and having a sealed rim so as to allow the electrode lead to protrude to the outside; and A clamp-type clamp unit that is fitted into the battery case and fixed to the battery cell; comprising A pouch cell assembly characterized by the clamp unit pressing a battery case corresponding to the portion where the electrode lead is protruded.
In paragraph 1, The above clamp unit is, A support plate supporting one side of the above battery cell; and A pouch cell assembly comprising: a pressure plate combined with the support plate and pressurizing a battery case supported by the support plate through a front portion.
In paragraph 1, The above battery case is, Electrode part corresponding to the position of the electrode assembly; A lead sealing portion extending from the electrode portion and corresponding to a sealed position that surrounds the electrode lead; and A side sealing portion extending from the lead sealing portion and corresponding to a side position of the electrode assembly; comprising The clamp unit above is a pouch cell assembly fixed to the lead sealing portion.
In paragraph 1, The above clamp unit is a pouch cell assembly including a venting portion which is a portion where the pressure of the support plate and the pressure plate is weakened with respect to the width direction of the battery cell.
In paragraph 4, The above battery cell is a pouch cell assembly that discharges gas through the venting portion when the internal gas pressure exceeds the sealing force of the battery case.
In paragraph 4, A heat-resistant elastomer is provided on the surface of the clamp unit, and The above elastomer is a pouch cell assembly coated on the upper part of the support plate and the lower part of the pressure plate.
In paragraph 6, The above elastomer is a pouch cell assembly that is at least one of fluororubber and silicone rubber.
In paragraph 6, The above elastomer is a pouch cell assembly that is not coated on the venting portion.
In paragraph 4, The clamp unit includes a groove in a portion of the front section of at least one of the pressure plate and the support plate, based on the width direction of the battery cell. The above venting portion is a pouch cell assembly formed in the above groove.
In paragraph 1, The above clamp unit is, A pouch cell assembly further comprising: an elastic member that transmits elastic force to the pressure plate so that the front portion of the pressure plate presses the upper portion of the battery case.

Description

Pouch cell assembly The present invention relates to a pouch cell assembly. The present disclosure claims the benefit of priority based on Korean Patent Application No. 10-2024-0149646 filed October 29, 2024, and all contents of Korean Patent Application No. 10-2024-0149646 are incorporated by reference into the present disclosure. Rechargeable secondary batteries are attracting attention as a power source for devices requiring high output and large capacity, including electric vehicles, hybrid electric vehicles, and plug-in hybrid electric vehicles, which are being proposed as solutions to address air pollution caused by conventional gasoline and diesel vehicles using fossil fuels. In terms of battery shape, there is high demand for prismatic and pouch-type rechargeable batteries, which are thin and suitable for applications in products such as mobile phones; in terms of materials, there is high demand for lithium-ion batteries and lithium-ion polymer batteries, which possess advantages such as high energy density, discharge voltage, and output stability. Generally, a secondary battery comprises an electrode assembly in which electrodes and separators are alternately stacked, an electrode lead connected to the electrode, a battery case that encloses the electrode assembly so that the electrode lead is exposed to the outside, and an electrolyte filled together with the electrode assembly within the battery case. High-temperature gas may be generated inside the secondary battery during the charging and discharging process, and if the gas pressure exceeds the sealing force of the battery case, it may explode. Conventionally, methods to supplement the sealing power of the battery case in preparation for such dangerous situations are being sought. FIG. 1 is a plan view and a side view of a battery cell of the present invention. Figure 2 is a cross-sectional view of a part of the battery cell of Figure 1. FIG. 3 is a perspective view of a pouch cell assembly according to a first embodiment of the present invention. Figure 4 is a perspective view of the clamp unit of Figure 3. Fig. 5 is a front view of the clamp unit of Fig. 3. Figure 6 is a plan view of the clamp unit of Figure 3. Figure 7 is a modified example of the battery cell of Figure 3. FIG. 8 is a perspective view of a modified example of the clamp unit of FIG. 3. FIG. 9 is a plan view of a modified example of the clamp unit of FIG. 3. FIG. 10 is a perspective view of a pouch cell assembly according to a second embodiment of the present invention. FIG. 11 is a front view of a pouch cell assembly according to a second embodiment of the present invention. FIG. 12 is a perspective view of a pouch cell assembly according to a third embodiment of the present invention. FIG. 13 is a front view of a pouch cell assembly according to a third embodiment of the present invention. FIG. 14 is a perspective view of a pouch cell assembly according to a fourth embodiment of the present invention. FIG. 15 is a front view of a pouch cell assembly according to a fourth embodiment of the present invention. FIG. 16 is a perspective view of a pouch cell assembly according to a fifth embodiment of the present invention. FIG. 17 is a front view of a pouch cell assembly according to a fifth embodiment of the present invention. FIG. 18 is a perspective view of a pouch cell assembly according to a sixth embodiment of the present invention. FIG. 19 is a front view of a pouch cell assembly according to a sixth embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application. In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted. Since embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely r