KR-102964271-B1 - BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME

KR102964271B1KR 102964271 B1KR102964271 B1KR 102964271B1KR-102964271-B1

Abstract

A battery module according to one embodiment of the present invention comprises: a battery cell assembly having a plurality of battery cells stacked thereon; a module frame having an open front and rear surface that accommodates the upper and lower surfaces and both sides of the battery cell assembly; a heat sink located on the module frame and including a plurality of cooling channels; and a venting cover located on the heat sink, wherein the battery cell assembly includes a first battery cell assembly and a second battery cell assembly, and the first battery cell assembly and the second battery cell assembly are spaced apart in a direction facing each other.

Inventors

김태근
안혁
임상욱
최종화
이형석
윤영일

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260512
Application Date: 20210622

Claims (16)

A battery cell assembly in which multiple battery cells are stacked; A module frame that accommodates the upper and lower surfaces and both sides of the above-mentioned battery cell assembly, with the front and rear surfaces open; A heat sink located on the above module frame and comprising a plurality of cooling channels; and It includes a venting cover located on the heat sink and in contact with the upper portion of the plurality of cooling channels, The above battery cell assembly includes a first battery cell assembly and a second battery cell assembly, and The first battery cell assembly and the second battery cell assembly are spaced apart in a direction facing each other, and The above plurality of cooling channels protrude toward the venting cover with respect to the bottom surface of the heat sink, and A battery module in which the space between two adjacent cooling channels among the plurality of cooling channels and the space surrounded by the venting cover form a venting channel.
In paragraph 1, A battery module comprising a module frame upper portion and a heat sink including a venting hole for inducing gas and flame from the battery cell assembly to the venting path.
In paragraph 1, A battery module comprising a venting cover that protrudes toward the center of the heat sink and includes a blocking portion located on the venting channel.
In paragraph 1, A battery module in which the plurality of cooling channels extend along the longitudinal direction of the heat sink and are spaced apart from each other.
A battery cell assembly in which multiple battery cells are stacked; A module frame that accommodates the upper and lower surfaces and both sides of the above-mentioned battery cell assembly, with the front and rear surfaces open; A heat sink located on the above module frame and comprising a plurality of cooling channels; and It includes a venting cover located on the heat sink above, and The above battery cell assembly includes a first battery cell assembly and a second battery cell assembly, and The first battery cell assembly and the second battery cell assembly are spaced apart in a direction facing each other, and A battery module in which the upper part of the module frame has a cooling hole formed facing the upper surface of the battery cell assembly.
In paragraph 5, A battery module in which the above cooling hole includes a first cooling hole and a second cooling hole, wherein the first cooling hole faces the upper surface of the first battery cell assembly and the second cooling hole faces the upper surface of the second battery cell assembly.
In paragraph 5, It further includes a heat transfer member located inside the cooling hole, and The above heat transfer member is a battery module located between the heat sink and the battery cell assembly.
In Paragraph 7, The above heat transfer member is a battery module located between the heat sink and the upper surface of the first battery cell assembly and between the heat sink and the upper surface of the second battery cell assembly, respectively.
In paragraph 6, The upper part of the module frame comprises at least one first venting hole formed between the first cooling hole and the second cooling hole.
In Paragraph 9, A battery module in which some of the above-mentioned first venting holes are located adjacent to one side of the first battery cell assembly, and other parts are located adjacent to one side of the second battery cell assembly.
In Paragraph 9, The above heat sink is a battery module having at least one second venting hole formed at a position facing the at least one first venting hole.
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In paragraph 1, The above module frame includes a first U-shaped frame and a second U-shaped frame, and The first U-shaped frame accommodates the upper surface and both sides of the first battery cell assembly and the second battery cell assembly, and has its front and rear surfaces open. The above second U-shaped frame accommodates the bottom surface and both sides of the first battery cell assembly and the second battery cell assembly, and is a battery module with the front and rear surfaces open.
A battery cell assembly in which multiple battery cells are stacked; A module frame that accommodates the upper and lower surfaces and both sides of the above-mentioned battery cell assembly, with the front and rear surfaces open; A heat sink located on the above module frame and comprising a plurality of cooling channels; and It includes a venting cover located on the heat sink above, and The above battery cell assembly includes a first battery cell assembly and a second battery cell assembly, and The first battery cell assembly and the second battery cell assembly are spaced apart in a direction facing each other, and The above module frame includes a first U-shaped frame and a second U-shaped frame, and The first U-shaped frame accommodates the upper surface and both sides of the first battery cell assembly and the second battery cell assembly, and has its front and rear surfaces open. The second U-shaped frame accommodates the bottom surface and both sides of the first battery cell assembly and the second battery cell assembly, and has its front and rear surfaces open. The side of the first U-shaped frame includes a first extension extending outwardly, and The side of the second U-shaped frame includes a second extension extending outwardly, and The above-mentioned first extension and the above-mentioned second extension are in contact with each other.
In Paragraph 14, A battery module in which the first extension and the second extension are joined together by a fixing member.
A battery pack comprising a battery module according to paragraph 1.

Description

Battery module and battery pack including the same The present invention relates to a battery module and a battery pack including the same, and more specifically, to a battery module and a battery pack including the same that improve cooling performance and venting performance while increasing space efficiency. With the increasing technological development and demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing. In particular, secondary batteries are attracting significant interest as an energy source not only for mobile devices such as mobile phones, digital cameras, laptops, and wearable devices, but also for power devices such as electric bicycles, electric vehicles, and hybrid electric vehicles. While small mobile devices use one or two or three battery cells per device, medium-to-large devices such as automobiles require high output and large capacity. Therefore, medium-to-large battery modules in which multiple battery cells are electrically connected are used. Since it is desirable for medium-to-large battery modules to be manufactured with the smallest possible size and weight, prismatic batteries and pouch-type batteries, which can be stacked with high integration density and have a low weight-to-capacity ratio, are mainly used as battery cells for medium-to-large battery modules. Meanwhile, the battery module may include a module frame that houses the battery cell stack in an internal space, with the front and rear sides open, to protect the battery cell stack from external shock, heat, or vibration. Considering that the temperature of a battery cell is one of the factors limiting battery output, localized temperature rises within the cell are highly likely to prematurely limit battery output, necessitating improvements. Furthermore, as battery modules have recently become larger, the number of stacked cells within the module has increased, exacerbating cooling disparities between cells. In addition, if some battery modules are subject to overvoltage, overcurrent, or overheating, the safety and operational efficiency of the battery modules may be compromised. In particular, as battery module capacities are increasingly trending toward improving driving range, it is necessary to design a structure that satisfies strengthening safety standards and ensures the safety of the vehicle and the driver. To this end, there is a growing need for a structure that can effectively vent gases and flames generated from some battery cells within the battery module to minimize damage. Accordingly, there is a need to develop a battery module and a battery pack including the same that can improve cooling performance for heat generated within the battery cell stack while effectively discharging gases and/or flames generated when ignition occurs in some battery cells. FIG. 1 is an exploded perspective view of a battery module according to one embodiment of the present invention. FIG. 2 is a perspective view of a battery module combining the components of FIG. 1. Figure 3 is a schematic diagram showing a cross-section cut along the cutting line AA of Figure 2. Figure 4 is a drawing showing an enlarged view of area a of Figure 3. Figure 5 is a drawing showing the cooling channel and venting channel of Figure 1. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, throughout the specification, when a part is described as “comprising” a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side. Hereinafter, a battery module according to an embodiment of the present invention will be described. However, the description herein will be based on the front side of the battery module, but is not necessarily limited thereto, and the description may be identical