KR-20260063128-A - CELL ASSEMBLY AND BATTERY PACK INCLUDING THE SAME

KR20260063128AKR 20260063128 AKR20260063128 AKR 20260063128AKR-20260063128-A

Abstract

The technical concept of the present invention provides a cell assembly comprising: a cell block including a plurality of battery cells; a first side beam connected to a first side of the cell block and having a first groove; a second side beam connected to a second side of the cell block; a first bolt fastened to the first side beam; and a first pressure block provided within the first groove of the first side beam and configured to be pressed by the first bolt to press the cell block in a first direction toward the second side of the cell block.

Inventors

이인제
김경우
정세윤
백윤선
박종희
김슬기

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (15)

A cell block comprising a plurality of battery cells; A first side beam connected to the first side of the cell block and having a first groove; A second side beam connected to the second side of the cell block above; A first bolt fastened to the first side beam; and A first pressure block provided within the first groove of the first side beam and configured to be pressed by the first bolt to press the cell block in a first direction toward the second side from the first side of the cell block; A cell assembly including
In Article 1, The first bolt is configured to move on the first side beam, and A cell assembly characterized in that the first pressure block includes an inclined surface that is extended at an angle with respect to the direction of movement of the first bolt at a portion in contact with the first bolt.
In Article 1, A second bolt fastened to the second side beam; and A second pressure block provided within a second groove of the second side beam and configured to be pressed by the second bolt to press the cell block in a second direction opposite to the first direction; A cell assembly characterized by further including
In Paragraph 3, The second bolt is configured to move on the second side beam, and A cell assembly characterized in that the second pressure block includes an inclined surface that is extended at an angle with respect to the direction of movement of the second bolt at a portion in contact with the second bolt.
In Paragraph 3, The first side beam above is, A first connecting plate connected to the first side of the cell block; and A first flange connected to the upper part of the first connecting plate and including the first groove in which the first pressure block is received; Includes, The above second side beam is, A second connecting plate connected to the second side of the cell block; and A second flange connected to the lower part of the second connecting plate and including the second groove in which the second pressure block is received; A cell assembly characterized by including
In Paragraph 3, A cell assembly characterized in that the first pressure block and the second pressure block are not aligned in the first direction.
In Article 1, A cell assembly characterized by further including a guide block configured such that the first side beam guides the movement of the first pressure block along the first direction and restricts the movement of the first pressure block along a direction perpendicular to the first direction.
In Article 1, A cell assembly characterized by further including an elastic pad connected to the surface of the first pressure block facing the cell block.
In Article 1, A third bolt fastened to the first side beam; and A third pressure block provided within the first groove of the first side beam so as to be spaced apart from the first pressure block, and configured to be pressed by the third bolt to press the cell block in the first direction; A cell assembly characterized by further including
In Article 1, A cell assembly characterized in that the plurality of battery cells are arranged in the first direction between the first side beam and the second side beam.
Pack housing; and A plurality of cell assemblies accommodated in the above-mentioned pack housing; Includes, Each of the above plurality of cell assemblies is, A cell block comprising a plurality of battery cells; A first side beam connected to the first side of the cell block and having a first groove; A second side beam connected to the second side of the cell block above; A first bolt fastened to the first side beam; and A first pressure block provided within the first groove of the first side beam and configured to be pressed by the first bolt to press the cell block in a first direction toward the second side from the first side of the cell block; A battery pack including
In Article 11, A second bolt fastened to the second side beam; and A second pressure block provided within a second groove of the second side beam and configured to be pressed by the second bolt to press the cell block in a second direction opposite to the first direction; A battery pack characterized by further including
In Article 12, The first bolt is configured to move on the first side beam, and The first pressure block includes an inclined surface that extends at an angle with respect to the direction of movement of the first bolt at a portion in contact with the first bolt, and The second bolt is configured to move on the second side beam, and A battery pack characterized in that the second pressure block includes an inclined surface that is extended at an angle with respect to the direction of movement of the second bolt at the portion in contact with the second bolt.
In Article 12, The first side beam above is, A first connecting plate connected to the first side of the cell block; and A first flange connected to the upper part of the first connecting plate and including the first groove in which the first pressure block is received; Includes, The above second side beam is, A second connecting plate connected to the second side of the cell block; and A second flange connected to the lower part of the second connecting plate and including the second groove in which the second pressure block is received; A battery pack characterized by including
In Article 14, A battery pack characterized in that the first flange of a first side beam provided to one of the plurality of cell assemblies is seated on the second flange of a second side beam provided to another of the plurality of cell assemblies.

Description

Cell assembly and battery pack including the same The present invention relates to a cell assembly and a battery pack including the same. Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for various wireless devices such as handsets, laptops, and cordless vacuum cleaners. Recently, as the manufacturing cost per unit capacity of secondary batteries has decreased dramatically due to improved energy density and economies of scale, and as the driving range of BEVs (battery electric vehicles) has increased to a level equivalent to that of fuel vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility. As rechargeable batteries are increasingly used in mobility, demands for their safety are rising. Given that accidents such as fires involving rechargeable batteries in mobility applications can endanger the lives of drivers, research into technologies to enhance battery safety is indispensable. FIG. 1 is a plan view showing a cell assembly according to exemplary embodiments. Figure 2 is a cross-sectional view showing a cross- section of a cell assembly along the line AA-AA' of Figure 1. FIG. 3 is a perspective view showing a first pressure block according to exemplary embodiments. Figure 4 is a diagram showing the assembly process of a cell assembly. FIG. 5 is a cross-sectional view showing a cell assembly according to exemplary embodiments. FIG. 6 is a cross-sectional view showing a battery pack according to exemplary embodiments. Figure 7 is a cross-sectional view showing the cross-section of a battery pack along the BB-BB' line of Figure 6. FIGS. 8 and 9 are cross-sectional views illustrating the process of assembling a cell assembly to a lifting jig according to exemplary embodiments. 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. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present 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 reflect the actual size or proportion. (1st embodiment) FIG. 1 is a plan view showing a cell assembly (100) according to exemplary embodiments. FIG. 2 is a cross-sectional view showing a cross- section of the cell assembly (100) along the line AA-AA' of FIG. 1. FIG. 3 is a perspective view showing a first pressure block (140) according to exemplary embodiments. Referring to FIGS. 1 to 3, the cell assembly (100) may include a cell block (110), a first side beam (120), a second side beam (130), a first pressure block (140), a second pressure block (150), a first bolt (161), and a second bolt (163). The cell block (110) may include a plurality of battery cells (111). An individual battery cell (111) is a basic unit of a lithium-ion battery, i.e., a secondary battery. An individual battery cell (111) may include an electrode assembly, an electrolyte, and a cell case. The electrode assembly embedded in the cell case may include a positive electrode, a negative electrode, and a separator interposed between the positive and negative electrodes. Depending on the assembly form, the electrode assembly may be either a jelly-roll type or a stack type. A jelly-roll type electrode assembly may include a wound structure of a positive electrode, a negative electrode, and a separator interposed between them. A stack type electrode assembly may include a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed between them, which are stacked sequentially. The positive electrode may include a positive current collector and a positive active material. The negative electrode may include a negative current collector and a negat