JP-7855711-B2 - Battery pack

JP7855711B2JP 7855711 B2JP7855711 B2JP 7855711B2JP-7855711-B2

Inventors

ジョン・ピル・ジョン
ミン・ボム・キム
ジュ・ファン・シン
ジュン・ヨブ・ソン
ヒョン・スク・イ

Assignees

エルジーエナジーソリューションリミテッド

Dates

Publication Date: 20260508
Application Date: 20231201
Priority Date: 20221202

Claims (11)

A housing including a plate section and side walls, A first battery module, a second battery module, and a third battery module are arranged on the plate portion along a first direction parallel to the upper surface of the plate portion, wherein each of the first battery module, the second battery module, and the third battery module includes a cell stack containing a plurality of battery cells and a first crossbeam and a second crossbeam spaced apart from each other with the cell stack in between, and the first crossbeam and the second crossbeam have complementary shapes but different shapes, A reinforcing band connected to the first crossbeam of the first battery module and the second crossbeam of the third battery module, In a battery pack including, The second battery module is located between the first battery module and the third battery module. The second crossbeam of the first battery module faces the first crossbeam of the second battery module, and The second crossbeam of the second battery module faces the first crossbeam of the third battery module . The battery pack further includes a plurality of fastening members that penetrate the reinforcing band, the first crossbeam of the first battery module, and the second crossbeam of the third battery module, and fix the first crossbeam of the first battery module and the second crossbeam of the third battery module to the plate portion of the housing .
A housing including a plate section and side walls, A first battery module, a second battery module, and a third battery module are arranged on the plate portion along a first direction parallel to the upper surface of the plate portion, wherein each of the first battery module, the second battery module, and the third battery module includes a cell stack containing a plurality of battery cells and a first crossbeam and a second crossbeam spaced apart from each other with the cell stack in between, and the first crossbeam and the second crossbeam have complementary shapes but different shapes, A reinforcing band connected to the first crossbeam of the first battery module and the second crossbeam of the third battery module, In a battery pack including, The second battery module is located between the first battery module and the third battery module. The second crossbeam of the first battery module faces the first crossbeam of the second battery module, and The second crossbeam of the second battery module faces the first crossbeam of the third battery module . The battery pack further includes a plurality of fastening members that penetrate the reinforcing band, the second crossbeam of the first battery module, and the first crossbeam of the second battery module, and fix the second crossbeam of the first battery module and the first crossbeam of the second battery module to the plate portion of the housing .
The battery pack according to claim 1 or 2 , wherein the reinforcing band extends along the first direction.
The battery pack according to claim 1 or 2 , wherein a plurality of reinforcing bands are provided.
The battery pack according to claim 1 or 2 , wherein the reinforcing band is disposed on the first battery cell assembly and the second battery cell assembly.
A housing including a plate section and side walls, A first battery module, a second battery module, and a third battery module are arranged on the plate portion along a first direction parallel to the upper surface of the plate portion, wherein each of the first battery module, the second battery module, and the third battery module includes a cell stack containing a plurality of battery cells and a first cross beam and a second cross beam spaced apart from each other with the cell stack in between. The first crossbeam of the first battery module, the second crossbeam of the first battery module, and the first reinforcing band coupled to the first crossbeam of the second battery module, Multiple fastening members that penetrate the first reinforcing band, the first crossbeam of the first battery module, the second crossbeam of the first battery module, and the first crossbeam of the second battery module, and fix the first crossbeam of the first battery module, the second crossbeam of the first battery module, and the first crossbeam of the second battery module to the plate portion of the housing, A battery pack, including the battery pack.
The battery pack according to claim 6 , wherein the first reinforcing band is disposed on the first battery module.
The battery pack according to claim 6, further comprising a second reinforcing band coupled to the second crossbeam of the first battery module, the first crossbeam of the second battery module, the second crossbeam of the second battery module, and the first crossbeam of the third battery module.
The battery pack according to claim 8, further comprising a plurality of fastening members that penetrate the second reinforcing band and fix the second crossbeam of the first battery module, the first crossbeam of the second battery module, the second crossbeam of the second battery module, and the first crossbeam of the third battery module to the plate portion of the housing.
The battery pack according to claim 6, further comprising the second crossbeam of the second battery module, the first crossbeam of the third battery module, and a third reinforcing band coupled to the second crossbeam of the third battery module.
The battery pack according to claim 10, further comprising a plurality of fastening members that penetrate the third reinforcing band and fix the second crossbeam of the second battery module, the first crossbeam of the third battery module, and the second crossbeam of the third battery module to the plate portion of the housing.

Description

This invention relates to a battery pack. This application claims the benefits of Korean application number 10-2022-0166597, filed on December 2, 2022, and Korean application number 10-2023-0035257, filed on March 17, 2023, which are herein referenced in their entirety. Unlike primary batteries, rechargeable batteries can be charged and discharged multiple times. Rechargeable batteries are widely used as an energy source for a variety of wireless devices, such as handsets, laptops, and wireless vacuum cleaners. In recent years, improvements in energy density and economies of scale have dramatically reduced the manufacturing cost per unit capacity of rechargeable batteries. As the driving range of battery electric vehicles (BEVs) increases to levels comparable to those of fuel-powered vehicles, the primary use of rechargeable batteries is shifting from mobile devices to mobility. When secondary batteries undergo repeated charging and discharging, a swelling phenomenon occurs due to chemical reactions within the internal materials, causing the battery case to expand. This swelling phenomenon is particularly pronounced in pouch-type battery cells, which have relatively weak rigidity. Since this swelling induces changes in the physicochemical properties of pouch-type battery cells, various techniques for controlling swelling are being researched. This is a plan view showing a battery pack according to an exemplary embodiment.This is a cross-sectional view along the cutting line 1I-1I' in Figure 1.This is a plan view showing a battery pack according to an exemplary embodiment.This is a cross-sectional view along the cutting line 3I-3I' in Figure 3.This is a plan view showing a battery pack according to an exemplary embodiment.This is a plan view showing a battery pack according to an exemplary embodiment. Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Before that, however, the terms and words used herein and in the claims should not be construed to be limited to their ordinary or dictionary meanings, but rather to mean and concise terms consistent with the technical spirit of the present invention, based on the principle that an inventor may appropriately define the concepts of terms in order to best describe his own invention. Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the invention; therefore, there may be a variety of equivalents and modifications that can substitute for them at the time of filing. Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function would obscure the gist of the invention, such detailed description will be omitted. The embodiments of the present invention are provided to more fully explain the invention to a person of ordinary skill; therefore, the shapes and sizes of components in the drawings may be exaggerated, omitted, or illustrated schematically for the sake of clarity. Accordingly, the sizes and proportions of each component do not fully reflect their actual sizes and proportions. (First Embodiment) Figure 1 is a plan view showing a battery pack 100 according to an exemplary embodiment. Figure 2 is a cross-sectional view along the cutting line 1I-1I' in Figure 1. Referring to Figures 1 and 2, the battery pack 100 may include a housing 110, multiple battery cell assemblies 120, a center beam 130, multiple exhaust devices 140, multiple reinforcing bands 150, and multiple fastening members 160. The battery pack 100 is the final form of a battery system installed in a mobility device or the like. The housing 110 may provide space for arranging multiple battery cell assemblies 120. The housing 110 may include a plate portion 111 and side walls 112, 113, 114, and 115. The plate portion 111 may include an upper surface 111U and a lower surface 111L that are substantially parallel to each other. The upper surface 111U and the lower surface 111L may face each other. Two directions substantially parallel to the upper surface 111U of the plate portion 111 are defined as the X and Y directions, and the direction substantially perpendicular to the upper surface 111U of the plate portion 111 is defined as the Z direction. Each of the X, Y, and Z directions may be substantially perpendicular to each other. Unless otherwise stated, the direction definitions are the same for the following drawings. According to an exemplary embodiment, the plate portion 111 may include a plurality of plates welded together by friction stir welding. When the plate portion 111 is provided by friction stir welding, the plate portion 111 may include interfaces between different plates. According to an exemplary embodiment, the plate portion 111 may also consist of a single plate. Th