JP-7857442-B2 - Battery pack

JP7857442B2JP 7857442 B2JP7857442 B2JP 7857442B2JP-7857442-B2

Inventors

ジュ・ファン・シン
ヒョン・スク・イ
ジェ・ヒョン・イ
チャン・ヒョン・ヤン

Assignees

エルジーエナジーソリューションリミテッド

Dates

Publication Date: 20260512
Application Date: 20230731
Priority Date: 20220804

Claims (10)

A pack case including a lower case and an upper case that define the internal space, Multiple battery cells provided within the aforementioned internal space, Includes a pack gasket provided between the lower case and the upper case, The aforementioned pack gasket is The first surface facing the upper case, A second surface opposite to the first surface, which faces the lower case, The first side facing the internal space, The pack case includes a second side portion facing the outside, The pack gasket includes, in any cross-section in the width direction, at least partially, a heat-resistant plastic member between the first side and the second side. The pack gasket includes a gasket body and a heat-resistant plastic member positioned to protect at least a portion of the gasket body. The gasket body portion includes a storage portion, The heat-resistant plastic member is placed inside the storage compartment. The gasket body portion is, A first portion interposed between the upper case and the lower case, A second portion extends from the first portion into the internal space and along the side walls of the upper case and/or the lower case, Includes, A battery pack in which the second portion is not interposed between the upper case and the lower case, the storage portion is formed in the second portion, and the heat-resistant plastic member is not interposed between the upper case and the lower case .
The heat-resistant plastic member extends at least partially along the joint surface between the upper case and the lower case, The battery pack according to claim 1, wherein the heat-resistant plastic member is positioned closer to the internal space than the center between the first side and the second side.
The battery pack according to claim 1 , wherein in the thickness direction of the first portion, the dimensions of the heat-resistant plastic member are even greater than the thickness of the first portion.
The battery pack according to claim 1 , wherein the heat-resistant plastic member is arranged to overlap the first portion in the lateral direction of the first portion over the entire thickness of the first portion.
The battery pack according to claim 1 , wherein the heat-resistant plastic member is formed integrally with or integrated with the gasket body.
The battery pack according to claim 5 , wherein the heat-resistant plastic member is integrated with the gasket body using an insert mold method.
The battery pack according to claim 5, wherein the heat-resistant plastic member comprises one or more of the following : acrylonitrile resin, acrylic resin, benzimidazole resin, indoline resin, imide resin, amide resin, phenylene oxide resin, butylene terephthalate resin, fluororesin, or copolymers thereof.
A pack case including a lower case and an upper case that define the internal space, Multiple battery cells provided within the aforementioned internal space, Includes a pack gasket provided between the lower case and the upper case, The pack gasket includes a heat-resistant plastic member that extends along the joint surface between the upper case and the lower case, and a gasket body portion. The heat-resistant plastic member is integrated with the gasket body , The pack gasket includes a gasket body and a heat-resistant plastic member positioned to protect at least a portion of the gasket body. The gasket body portion includes a storage portion, The heat-resistant plastic member is placed inside the storage compartment. The gasket body portion is, A first portion interposed between the upper case and the lower case, A second portion extends from the first portion into the internal space and along the side walls of the upper case and/or the lower case, Includes, A battery pack in which the second portion is not interposed between the upper case and the lower case, the storage portion is formed in the second portion, and the heat-resistant plastic member is not interposed between the upper case and the lower case .
The gasket body includes a storage section, The heat-resistant plastic member is inserted into the storage compartment, as described in claim 8 .
The battery pack according to claim 8 , wherein the heat-resistant plastic member extends at least over the distance between the upper case and the lower case.

Description

This invention relates to a battery pack, and more specifically, to a battery pack that can improve safety by maintaining the sealing performance of the pack gasket even when a flame occurs inside. This application claims priority under Korean Patent Application No. 10-2022-0097560 dated August 4, 2022, and Korean Patent Application No. 10-2023-0043322 dated April 3, 2023, and all content disclosed in the documents of said Korean patent applications is incorporated herein by reference. 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. Furthermore, as the driving range of battery electric vehicles (BEVs) has increased to levels comparable to fuel-powered vehicles, the primary use of rechargeable batteries is shifting from mobile devices to mobility. The latest trends in the technological development of rechargeable batteries for mobility are improvements in energy density and safety. Here, the energy density of a rechargeable battery is the value obtained by dividing the maximum electrical energy that the battery can store by its mass. Since a high energy density in rechargeable batteries directly impacts the driving efficiency and range of mobility vehicles, various studies are being conducted to improve the energy density of rechargeable batteries. This is a perspective view of a battery pack according to an exemplary embodiment.This is a perspective view showing some elements of a battery pack according to an exemplary embodiment.Figure 2 is a partial perspective view showing a cross-section of the battery pack in Figure 1, cut along the line III-III'.This is a cross-sectional perspective view showing the main part of a pack gasket according to one embodiment of the present invention.This is a partial cross-sectional perspective view showing a cross-section of a battery pack according to another embodiment of the present invention, obtained by cutting along the line III-III' in Figure 2.This is a partial cross-sectional perspective view showing a cross-section of a battery pack according to another embodiment of the present invention, obtained by cutting along the line III-III' in Figure 2.This is a partial cross-sectional perspective view showing a cross-section of a battery pack according to another embodiment of the present invention, obtained by cutting along the line III-III' in Figure 2.This is a partial cross-sectional perspective view showing a cross-section of a battery pack according to another embodiment of the present invention, obtained by cutting along the line III-III' in Figure 2.This is a partial perspective view of the battery pack 100 of this embodiment.This is a partial perspective view of the lower case, which is fitted with a reinforced pack gasket at the corners. The following describes preferred embodiments of the concept of the present invention in detail with reference to the accompanying drawings. However, embodiments of the concept of the present invention can be modified into various different forms, and the scope of the concept of the present invention should not be construed as being limited by the embodiments described above. It is preferable that the embodiments of the concept of the present invention be construed as being provided to more fully explain the concept of the present invention to a person of average knowledge in the art. The same reference numerals mean the same element throughout. Furthermore, the various elements and areas in the drawings are depicted schematically. Therefore, the concept of the present invention is not limited by the relative sizes or spacings depicted in the accompanying drawings. The terms "first," "second," etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the concept of this invention, the first component may be named the second component, and conversely, the second component may be named the first component. The terminology used in this application is used solely to describe specific embodiments and is not intended to limit the concepts of the invention. A singular expression includes plural expressions unless the context clearly indicates otherwise. In this application, expressions such as "includes" or "has" are intended to specify the existence of features, quantities, steps, operations, components, parts, or combinations thereof described in the specification, and are understood not to pre-exist to exclude the existence or possibility of adding one or more other features, quantities, steps,