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KR-102964270-B1 - BATTERY PACK AND DEVICE INCLUDING THE SAME

KR102964270B1KR 102964270 B1KR102964270 B1KR 102964270B1KR-102964270-B1

Abstract

A battery pack according to one embodiment of the present invention comprises: a pack frame on which a plurality of battery modules are mounted; a heat sink located on the lower surface of the plurality of battery modules; and a heat transfer member located between the heat sink and the lower surface of the plurality of battery modules, wherein an insulating member is attached to at least one end of the heat sink.

Inventors

  • 임소은
  • 유형석
  • 김동현
  • 이형석

Assignees

  • 주식회사 엘지에너지솔루션

Dates

Publication Date
20260512
Application Date
20210324

Claims (13)

  1. A pack frame on which multiple battery modules are mounted; A heat sink located on the lower surface of the plurality of battery modules above; and It includes a heat transfer member located between the heat sink and the lower surface of the plurality of battery modules, and An insulating member is attached to at least one end of the above heat sink, and The heat sink includes an end positioned adjacent to the side of the pack frame, and At least some of the above insulating members are located between the heat transfer member and the heat sink, and A battery pack extending along the end side of the heat sink, while the remaining portion of the insulating member covers the corner of the end of the heat sink.
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  5. In paragraph 1, The above battery module includes a first battery module and a second battery module, and A battery pack in which a plurality of first battery modules are mounted on the upper part of the pack frame and a plurality of second battery modules are mounted on the lower part of the pack frame.
  6. In paragraph 5, The above heat sink includes a first heat sink and a second heat sink, and A battery pack in which the first heat sink is located on the lower surface of the plurality of first battery modules and the second heat sink is located on the lower surface of the plurality of second battery modules.
  7. In paragraph 6, The above insulating member includes a first insulating member and a second insulating member, and The first insulating member is attached to at least one end of the first heat sink, and The above second insulating member is a battery pack attached to at least one end of the above second heat sink.
  8. In Paragraph 7, A battery pack further comprising a horizontal plate located between the first heat sink and the upper portion of the plurality of second battery modules.
  9. In paragraph 8, A battery pack in which the number of second battery modules included in the plurality of second battery modules is greater than the number of first battery modules included in the plurality of first battery modules.
  10. In Paragraph 9, The above second heat sink is a battery pack having a structure in which a pair of the above first heat sinks are arranged side by side and connected to each other.
  11. In Paragraph 10, The above heat transfer member is positioned on each of the pair of first heat sinks, and is a battery pack spaced apart from each other.
  12. In Paragraph 10, The above second insulating member is a battery pack attached to each end of a pair of the above first heat sinks.
  13. A device comprising a battery pack according to paragraph 1.

Description

Battery pack and device including the same The present invention relates to a battery pack and a device including the same, and more specifically, to a battery pack with improved insulation performance and a device including the same. Secondary batteries, which possess electrical characteristics such as high energy density and high applicability across product categories, are widely applied not only to portable devices but also to electric vehicles or hybrid vehicles powered by electric sources, and power storage devices. These secondary batteries are attracting attention as a new energy source for enhancing eco-friendliness and energy efficiency, not only for the primary advantage of drastically reducing the use of fossil fuels but also because they generate no by-products from energy use. Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density. Generally, lithium secondary batteries can be classified according to the shape of the casing into cylindrical or prismatic secondary batteries in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries in which the electrode assembly is embedded in a pouch of aluminum laminate sheet. Recently, with the increasing need for high-capacity secondary battery structures and the utilization of secondary batteries as energy storage sources, there is a growing demand for medium-to-large modular battery packs that aggregate battery modules in which multiple secondary batteries are connected in series or parallel. In these battery modules, capacity and output are enhanced by connecting multiple battery cells in series or parallel to form a stack of battery cells. Furthermore, multiple battery modules can be mounted together with various control and protection systems, such as a Battery Management System (BMS) and a cooling system, to form a battery pack. In particular, since the battery pack is composed of a structure in which multiple battery modules are combined, some battery modules are mounted within the pack frame of the battery pack, and it is necessary to ensure a sufficient insulation distance between each battery module and the pack frame. Recently, as battery modules and battery packs are being applied to high-performance vehicles, the demand for high-voltage modules and packs is increasing. In particular, since battery packs consist of a structure composed of multiple battery modules, some modules are mounted within the pack frame, and it is necessary to ensure sufficient insulation distance between each battery module and the pack frame. Accordingly, there is a need to develop battery packs that satisfy the insulation design standards for high-voltage packs by increasing the level of insulation distance and creepage distance. FIG. 1 is a perspective view of a battery pack according to one embodiment of the present invention. Figure 2 is an exploded perspective view of the battery pack of Figure 1. Figure 3 is an exploded perspective view showing an insulating member attached to a heat sink included in the battery pack of Figure 1. FIG. 4 is an exploded perspective view showing a heat transfer member located on the heat sink of FIG. 3. Figure 5 is a drawing showing an enlarged view of the dotted line area in the combined state of the components of Figure 2. Figure 6 is a simplified cross-section of the dotted line area of Figure 5. FIG. 7 is a perspective view of the first battery module of FIG. 2. 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 specific