KR-20260065236-A - Battery protection assembly and battery pack module including the same

KR20260065236AKR 20260065236 AKR20260065236 AKR 20260065236AKR-20260065236-A

Abstract

An embodiment of the present invention provides a battery protection structure comprising: a first frame portion having an extension portion extending in one direction and having a storage space for storing a battery pack provided therein; a cooling unit disposed at the bottom of the first frame portion for cooling the battery pack stored in the storage space; and a connecting portion disposed between the cooling unit and the first frame portion, wherein a first end portion is connected to the cooling unit and a second end portion is connected to the first frame portion.

Inventors

정창균
정경환
이민성
임재윤

Assignees

주식회사 포스코

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (12)

A first frame portion including an extension extending in one direction, with a storage space for housing a battery pack provided inside; A cooling unit disposed at the bottom of the first frame portion and cooling the battery pack stored in the storage space; and A battery protection structure comprising: a connecting portion disposed between the cooling unit and the first frame portion, wherein the first end is connected to the cooling unit and the second end is connected to the first frame portion.
In Article 1, The above cooling unit is, A battery protection structure comprising an upper plate portion, at least one lower plate portion coupled to the upper plate portion, and a cooling channel disposed between the upper plate portion and the lower plate portion through which a refrigerant travels.
In Article 2, A battery protection structure, wherein the first end of the above-mentioned connecting portion is connected to the lower surface of the above-mentioned upper plate portion, and the second end of the above-mentioned connecting portion is connected to the lower surface of the above-mentioned extension portion.
In Article 2, The above connecting part is, A battery protection structure made of the same material as the first frame portion, but made of a different material from the top plate portion.
In Paragraph 4, The above connecting part is, A battery protection structure that is joined to the first frame part by welding, and joined to the top plate part by mechanical joining.
In Article 2, The above extension is provided as a pair, and A battery protection structure in which a pair of the above-mentioned extensions are spaced apart to face each other, and the storage space is positioned between the pair of the above-mentioned extensions.
In Article 6, The above connecting part is, It includes a first penetration portion formed by penetrating one end of the above-mentioned connecting portion, and The above upper plate is, It includes a second through-hole formed by penetrating one end of the upper plate portion, The first penetration part and the second penetration part are A battery protection structure arranged in a line along the vertical direction and connected, positioned between a pair of the above extensions.
In Article 7, A battery protection structure further comprising: a connecting member inserted through the first penetration portion and the second penetration portion to connect the top plate portion and the connecting portion.
In Article 6, A battery protection structure further comprising: a sealing portion disposed between a pair of extension portions, sealing between the upper plate portion and the connecting portion.
In Article 2, The above lower plate is provided in multiple numbers, and A plurality of the above lower plates are, A battery protection structure coupled to the upper plate portion so as to be spaced apart along the above one direction.
In Article 1, A battery protection structure further comprising: a second frame portion protruding outwardly from the first frame portion.
A battery protection structure according to any one of claims 1 to 11; Battery pack placed inside the storage space; A lower cover coupled to the lower part of the battery protection structure and covering the lower part of the cooling unit; and A battery pack module comprising: an upper cover coupled to the upper part of the battery protection structure and covering the upper part of the storage space.

Description

Battery protection assembly and battery pack module including the same The present invention relates to a battery protection structure and a battery pack module including the same. Generally, electric vehicles include pure electric vehicles (EVs) that drive by powering a drive motor, hybrid electric vehicles (HEVs) that drive using both an engine and a drive motor, and fuel cell electric vehicles (FCEVs) that drive by powering a drive motor using electricity generated from a fuel cell. An electric vehicle includes a battery as a storage means to supply power to the drive motor, in addition to a drive motor for driving the vehicle; for example, nickel-hydrogen and lithium-polymer batteries are used. Such a battery is composed of a battery pack in which multiple battery pack modules are combined in series or parallel, and the battery pack is mounted in the electric vehicle while housed within a battery case. The battery case utilizes various load-bearing members to protect the battery pack housed inside. A typical example is the side frame of the battery case, which forms a side wall that partitions the space where the battery cells are mounted and surrounds the battery cells to protect them from external impacts. Recently, there has been an increasing trend of constructing the internal frames of battery cases using steel to reduce costs. However, for cooling plates used to cool battery packs, steel presents a problem due to its low thermal conductivity. Consequently, it is common practice to manufacture cooling plates using materials with higher thermal conductivity than steel and then combine them with the steel internal frame. In this context, there is a need to develop a connection structure and method that not only enables the efficient combination of dissimilar materials but also ensures crash stability against external impacts. FIG. 1 is a perspective view showing a disassembled view of a battery protection structure according to one embodiment of the present invention. FIG. 2 is a perspective view illustrating a battery protection structure according to one embodiment of the present invention. Figure 3 is a cross-sectional view showing the view from the direction II-II' of Figure 2. FIG. 4 illustrates a battery protection structure according to one embodiment of the present invention as viewed from below. FIG. 5 illustrates a battery protection structure according to another embodiment of the present invention viewed from below. FIG. 6 illustrates a battery protection structure according to another embodiment of the present invention, viewed from below. Preferred embodiments of the present invention will be described below with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, embodiments of the present invention are provided to more fully explain the present invention to those with average knowledge in the relevant technical field. In drawings, the shapes and sizes of elements may be exaggerated for clearer explanation. In describing the embodiments of the present invention, if it is determined that a detailed description of known technology related to the present invention may unnecessarily obscure the essence of the present invention, such detailed description will be omitted. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, such definitions should be based on the content throughout this specification. The terms used in the detailed description are merely for describing the embodiments of the present invention and should not be limited in any way. Unless explicitly stated otherwise, expressions in the singular form include the meaning of the plural form. In this description, expressions such as “include” or “equipped” are intended to refer to certain characteristics, numbers, steps, actions, elements, parts or combinations thereof, and should not be interpreted to exclude the existence or possibility of one or more other characteristics, numbers, steps, actions, elements, parts or combinations thereof other than those described. In this specification, terms such as 'top', 'upper', 'upper surface', 'lower', 'lower surface', 'lower surface', and 'side surface' are based on the drawings and may actually vary depending on the direction in which the elements or components are arranged. Additionally, throughout the specification, when it is said that one part is 'connected' to another part, this includes not only cases where they are 'directly connected,' but also cases where they are 'indirectly connected' with other elements in between. The present invention will be described in detail below through each embodiment or example of the invention. It should be noted that each embodim