KR-20260067783-A - BATTERY DEVICE

KR20260067783AKR 20260067783 AKR20260067783 AKR 20260067783AKR-20260067783-A

Abstract

In embodiments, a battery device is provided comprising a cell stack having a plurality of battery cells and one or more first heat blocking members stacked thereon, a second heat blocking member disposed on at least one side of the cell stack and in contact with one or more first heat blocking members in the height direction of the cell stack, and a housing that accommodates the cell stack and the second heat blocking member, wherein the housing includes a plurality of venting holes disposed facing the second heat blocking member, and the portion of the second heat blocking member facing the plurality of venting holes is configured to be opened by the internal pressure of the housing.

Inventors

민진기
김하은
박종욱
방유석
전상윤

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (15)

A cell stack having a plurality of battery cells and one or more first heat-blocking members stacked thereon; A second heat blocking member disposed on at least one side of the cell stack and in contact with the one or more first heat blocking members in the height direction of the cell stack; and It includes a housing that accommodates the cell stack and the second heat blocking member, The above housing includes a plurality of venting holes positioned facing the second heat-blocking member, and A battery device configured such that the portion facing the plurality of venting holes in the second heat-blocking member is opened by the internal pressure of the housing.
In Article 1, The above second heat blocking member is A first layer comprising an insulating material; and A battery device comprising a second layer disposed on at least one surface of the first layer and including a flame-retardant material.
In Article 2, The above second heat blocking member is A battery device formed by laminating the first layer between a pair of the second layers.
In Article 2, The first layer above includes silicon, A battery device in which the second layer comprises a material having higher flame retardancy than the silicon.
In Article 2, The above second heat blocking member is, A battery device comprising a plurality of first slits arranged facing the plurality of venting holes and configured to open by the internal pressure of the housing.
In Article 2, A battery device in which the end of the first heat blocking member presses the second heat blocking member in the height direction of the cell stack.
In Article 2, It further includes a third heat-blocking member covering at least a portion of the outer surface of the above housing, and The above third heat-blocking member covers the plurality of venting holes, battery device.
In Article 7, A battery device in which the third heat blocking member is made of a material different from the second heat blocking member.
In Article 7, The above third heat blocking member is, A battery device comprising a plurality of second slits arranged facing the plurality of venting holes and configured to open by the internal pressure of the housing.
In Article 9, The second heat-blocking member includes a plurality of first slits arranged facing the plurality of venting holes, and A battery device in which the plurality of first slits are arranged offset from each other in the height direction of the cell stack with the plurality of second slits.
In Article 7, The above housing is A main frame on which the above cell stack is mounted; and It further includes an upper cover that covers the open upper side of the main frame, and The battery device, wherein the plurality of venting holes are disposed in the upper cover.
In Article 11, The battery device, wherein the second heat-blocking member is adhesively fixed to the lower surface of the upper cover via an adhesive member.
In Article 11, One side of the second heat-blocking member is in contact with the upper cover, and A battery device in which the other side of the second heat-blocking member contacts at least one side of the cell stack.
In Article 13, The above third heat-blocking member covers the upper surface of the upper cover, battery device.
In Article 1, A battery device in which a cut-shaped slit is not formed in the second heat-blocking member.

Description

Battery Device The present invention relates to a battery device. Secondary batteries are widely used in mobile devices such as digital cameras, mobile phones, and laptops because they can be charged and discharged. In particular, they are recently attracting attention as a large-capacity energy source for applications such as electric vehicles and Energy Storage Systems (ESS). To realize such a large-capacity energy source, battery module or battery pack structures in which multiple secondary batteries (battery cells) are connected in series or parallel are being actively developed. In a battery device housing multiple secondary batteries, high-temperature gas or flames may be generated in some battery cells due to external impact, harsh charging and discharging, or short circuits between secondary batteries. At this time, if the high-temperature gas or flames ejected from a battery cell are transferred to an adjacent battery cell, it may cause a chain reaction of thermal runaway within the battery device. Therefore, a structure is required that can block high-temperature gas emitted from a battery cell from affecting other battery cells and safely discharge it to the outside of the battery device. FIG. 1 is a perspective view of a battery device according to embodiments. FIG. 2 is an exploded perspective view of a battery device according to embodiments. FIG. 3 is an exploded perspective view of a cell stack included in a battery device according to embodiments. FIG. 4 is a perspective view of a second heat-blocking member according to embodiments. Figure 5 is a reference diagram showing a second heat-blocking member positioned at the bottom of the upper cover. FIG. 6 is an exemplary cross-sectional view according to the section II-II' of FIG. 4. FIG. 7 is an exemplary cross-sectional view of a battery device according to embodiments. FIG. 8 is a reference diagram for explaining the venting of a battery device according to embodiments. FIG. 9 is a perspective view of a battery device according to embodiments. FIG. 10 is an exemplary cross-sectional view of a battery device according to embodiments. FIG. 11 is a reference diagram for explaining the venting of a battery device according to embodiments. Prior to the detailed description of the present invention, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, they should be interpreted in a sense and concept consistent with the technical spirit of the present invention, based on the principle that the inventor may appropriately define the concept of the terms to best describe his invention. Accordingly, 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 aspects of the technical spirit of the present invention. Therefore, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Identical reference numbers or symbols in each drawing attached to this specification represent parts or components that perform substantially the same function. For convenience of explanation and understanding, the same reference numbers or symbols may be used to describe different embodiments. That is, even if components having the same reference number are depicted in multiple drawings, the multiple drawings do not all represent a single embodiment. In the following description, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "comprising" or "constituting" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. In addition, it should be noted in advance that expressions such as upper side, top, lower side, bottom, side, front, and rear in the following description are based on the direction depicted in the drawings, and may be expressed differently if the direction of the object changes. Additionally, in this specification and claims, terms including ordinal numbers, such as "first," "second," etc., may be used to distinguish between components. These ordinal numbers are used to distinguish identical or similar components from one another, and the meaning of the terms should not be limited by the use of such ordinal numbers. For example, the order of use or arrangement of components combined with such ordinal numbers should not be limited by the number. If necessary, each ordinal number may be used interchangeably. Embodiments of the present invention will be described below with reference to the attached drawings. However, the scope of th