KR-102962905-B1 - Battery Module And Battery Pack Including The Same

KR102962905B1KR 102962905 B1KR102962905 B1KR 102962905B1KR-102962905-B1

Abstract

The present invention relates to a battery module and a battery pack including the same, specifically comprising: a lower case having a storage space formed by a bottom surface and a lower side wall; an upper case located above the lower case having a storage space formed by a top surface and an upper side wall; and a battery holder seated in the storage space of the lower case and the upper case and fixing a plurality of cylindrical battery cells; wherein the lower side wall or the upper side wall is provided with a guide portion to induce storage without twisting when the battery holder is stored.

Inventors

배문준
이영규
양성환
유동원

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260508
Application Date: 20220822

Claims (14)

A lower case with storage space provided by the lower surface and lower side wall; An upper case located on the upper part of the lower case, with a storage space provided by the upper surface and the upper side wall; and A battery holder that is seated in the storage space of the lower case and the upper case and secures a plurality of cylindrical battery cells; comprising, The lower side wall or upper side wall is provided with a guide portion to guide storage without twisting when storing the battery holder, and The above guide portion includes a first guide portion and a second guide portion that is semi-elliptical and protrudes toward the long side facing from one side of the first guide portion. The first guide portion is located on the long side of the lower side wall and is a rectangle that is folded inward toward the storage space and has one side open. A battery module characterized by having a second fastening groove formed in the second guide portion above, which accommodates a fastening member for fixing a lower case and an upper case.
In paragraph 1, The above guide part includes a third guide part, A battery module characterized by the third guide portion being a pair of semicircular shapes bent inward toward the storage space, each located on the opposite short sides of the lower side wall.
In paragraph 2, The above guide section includes a sixth guide section and an eighth guide section provided on the upper side wall, The sixth guide portion is located on the long side of the upper side wall and is bent inward toward the storage space, and the eighth guide portion is a pair of semicircular portions that are each located on the short sides facing each other of the upper side wall and are bent inward toward the storage space. A battery module characterized in that the first guide section, the sixth guide section, and the third guide section and the eighth guide section are located on the same vertical line.
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In paragraph 3, The above-mentioned sixth guide part is further provided with a seventh guide part protruding toward the long side facing each other, A battery module characterized in that the above-mentioned seventh guide portion is provided with a third support surface having a third through hole formed on the same vertical line as the above-mentioned second fastening groove.
In paragraph 3, The above guide section further includes a fourth guide section and a fifth guide section provided on the lower side wall, and a ninth guide section and a tenth guide section provided on the upper side wall, wherein The above-mentioned fourth guide section and fifth guide section each have a third fastening groove and a fourth fastening groove formed in a semi-elliptical shape protruding toward the storage space, and A battery module characterized in that the ninth guide section and the tenth guide section are semicircular and bent toward the storage space.
In paragraph 6, The ninth guide portion is provided with a fourth support surface that is in close contact with the upper surface of the fourth guide portion, and a fourth through hole is formed in the fourth support surface. A battery module characterized in that the above-mentioned 10th guide portion is provided with a 5th support surface that is in close contact with the upper surface of the above-mentioned 5th guide portion, and the 5th support surface has a 5th through hole formed therein.
In paragraph 3, A battery module characterized in that the lower surface of the lower case is provided with a first support surface having a first through hole and a second support surface having a second through hole, wherein the first support surface is located outside the first guide portion and the second support surface is located outside the third guide portion.
In paragraph 2, A battery module characterized in that the above-described battery holder includes a first holder and a second holder, and each of the first holder and the second holder is provided with a plurality of battery cell storage grooves arranged horizontally so that cylindrical battery cells can be stored in a horizontal direction.
In Paragraph 9, A battery module characterized in that one longitudinal side of the first holder is stored adjacent to the lower side wall where the first guide part is located, and the second holder is stored adjacent to the other longitudinal side of the first holder.
In Paragraph 10, A battery module characterized by having a first rectangular cutout along the height direction on one side of a first holder facing the lower side wall where the first guide part is located, and a second cutout on one side of the first cutout, wherein the second cutout is positioned in a direction facing the other side of the first holder and has a horizontal cross-sectional area smaller than that of the first cutout.
In Paragraph 11, The above battery holder further includes a third holder and a fourth holder, wherein the first holder, the second holder, the third holder, and the fourth holder are positioned sequentially, A battery module characterized by having a projection formed on the width-direction side, through which a fastening member passes, for fixing to the lower case.
In Paragraph 11, A semi-elliptical second guide part is positioned on one side of the first guide part, protruding toward the opposite long side, and The first guide portion is located in the first incision portion, and the second guide portion is located in the second incision portion, A battery module characterized in that the outer surfaces of the first guide portion and the second guide portion are spaced apart from the outer surfaces of the first cut portion and the second cut portion, respectively.
A battery pack comprising a battery module described in any one of paragraphs 1 to 3 and paragraphs 5 to 13.

Description

Battery Module and Battery Pack Including the Same The present invention relates to a battery module and a battery pack including the same. Specifically, it relates to a battery module having a structure that prevents a battery holder equipped with a plurality of cylindrical batteries from twisting when the battery holder is stored in a module case, and furthermore, minimizes damage to the battery holder, and a battery pack including the same. Recently, the demand for rechargeable batteries capable of storing generated electrical energy is increasing due to air pollution caused by the use of fossil fuels and the development of alternative energy sources resulting from energy depletion. Rechargeable rechargeable batteries are widely used in various fields, including mobile devices, electric vehicles, hybrid electric vehicles, and industrial robots. Rechargeable batteries, which serve as an indispensable energy source for various electronic devices in modern society, are seeing increased capacity requirements due to the growing usage and complexity of mobile devices and the development of electric vehicles. While multiple battery cells are arranged in small devices to meet user demand, vehicles utilize battery modules that electrically connect multiple battery cells, or battery packs equipped with multiple such modules. In particular, for cylindrical secondary batteries, a battery holder containing multiple batteries must be housed in a case; however, due to the increased capacity, the case is deep, and consequently, cases frequently occur where the housed battery holder becomes twisted or fails to be seated in the desired position, making fastening difficult. In addition, during the process of storing the battery holder in the case, surface contact between the case and the battery holder can cause damage to the battery holder, which may lead to fire or accidents due to faulty assembly. FIG. 1 is a perspective view of a battery pack including a pair of battery modules according to a preferred embodiment of the present invention. FIG. 2 is a perspective view of one battery module in the battery pack illustrated in FIG. 1. FIG. 3 is a perspective view of the lower case of the battery module shown in FIG. 2. FIG. 4 is a perspective view of the upper case of the battery module illustrated in FIG. 2. Figure 5 is a plan view of the interior of the battery module illustrated in Figure 2. FIG. 6 is a perspective view of the interior of the battery module illustrated in FIG. 5. FIG. 7 is a perspective view of a battery holder housed inside the battery module illustrated in FIG. 5. Figure 8 is a plan view of the battery holder illustrated in Figure 7. Figure 9 is an enlarged view of section 'A' of Figure 5. Figure 10 is an enlarged view of section 'B' of Figure 5. Embodiments that enable a person skilled in the art to easily implement the present invention are described in detail below with reference to the attached drawings. However, in describing the operating principles of preferred embodiments of the present invention in detail, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description is omitted. In addition, the same reference numerals are used for parts having similar functions and operations throughout the drawings. Throughout the specification, when a part is described as being 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. Furthermore, unless specifically stated otherwise, the inclusion of a certain component does not exclude other components but implies that additional components may be included. Hereinafter, a battery module according to the present invention and a battery pack including the same will be described with reference to the attached drawings. In drawings related to the battery holder, the X-axis direction is defined as the width direction, the Y-axis direction as the height direction, and the Z-axis direction as the length direction; furthermore, the side located in the width direction is to be represented as the cross-section, and the side located in the length direction is to be represented as the long side. FIG. 1 is a perspective view of a battery pack including a pair of battery modules according to a preferred embodiment of the present invention. As illustrated in FIG. 1, the battery pack according to the present invention may be configured to include a pair of battery modules (1000) positioned at a predetermined distance apart, a plurality of cable portions (2000), and a connection terminal (3000) connected to a device. These battery packs can be applied to devices such as humanoid robots, but are not specifically limited. A pair of battery modules (1000) spaced apart from each other are arranged symmetrically with respect to each other, but