KR-20260067222-A - PACK HOUSING AND MANUFACTURING METHOD OF BATTERY PACK

KR20260067222AKR 20260067222 AKR20260067222 AKR 20260067222AKR-20260067222-A

Abstract

The present invention relates to a pack housing and may include a base plate, a side member that forms a receiving space together with the base plate and is connected to the base plate, and a cross member that extends in a direction intersecting the side member. The side member may include an inner wall facing the receiving space and a guide holder that protrudes from the inner wall toward the receiving space and forms a guide hole into which the cross member is inserted.

Inventors

박종규
김경모
김시원
고건우

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (15)

Base plate; A side member that forms a receiving space together with the base plate and is connected to the base plate; and A cross member extending in a direction intersecting the above side member; comprising, The above side member is, An inner wall facing the above-mentioned receiving space; A pack housing comprising: a guide holder that protrudes from the inner wall toward the receiving space and forms a guide hole into which the cross member is inserted.
In paragraph 1, The above guide holder is, A pack housing comprising: a pair of holder walls protruding from the inner wall toward the receiving space, with the guide hole located between them.
In paragraph 2, The holder wall extends in one direction perpendicular to the base plate, and The above guide hole is a pack housing that extends in one direction along the holder wall.
In paragraph 3, The above cross member is a pack housing that is inserted into the guide hole in the above one direction.
In paragraph 2, The above guide holder is, A connecting wall that connects the pair of holder walls and contacts the inner wall, and includes a connecting inner surface facing the guide hole; and A pack housing further comprising an interference member that contacts the inner surface of the connection and interferes with the cross member.
In paragraph 5, The above interference member is, A pack housing that interferes with the cross member, allowing the cross member to be inserted in one direction toward the guide hole, but preventing the cross member from being withdrawn from the guide hole in the other direction opposite to the one direction.
In paragraph 5, The above interference member is, A support area in contact with the inner surface of the above connection; A pack housing comprising: an interference projection region that protrudes from the support region toward the guide hole and interferes with the cross member.
In Paragraph 7, The above interference protrusion region is, A protruding region connected to the support region and protruding from the support region; and A pack housing comprising: a cross member contact area extending from the above-mentioned protruding area and spaced apart from the above-mentioned support area.
In paragraph 8, A pack housing in which the above-mentioned protruding region has a shape inclined such that it forms a predetermined angle with respect to one direction in which the cross member is inserted into the guide hole and the direction toward the cross member, respectively.
In Paragraph 7, The above cross member is, A guide surface positioned parallel to the support area and in contact with the interference projection area; and A pack housing comprising: an interference surface protruding from the guide surface toward the support area and interfering with one end of the interference projection area.
In paragraph 3, The above holder wall is, The inner surface of the holder facing the above guide hole; and A pack housing comprising: a holder inlet surface that extends from the inner surface of the holder at a predetermined angle with respect to another direction opposite to the one direction, wherein the cross-sectional area of the guide hole on a plane perpendicular to the one direction becomes wider as it moves toward the other direction.
In paragraph 3, The guide holder further includes a connecting wall that connects the pair of holder walls and contacts the inner wall. The above connecting wall is, A connecting inner surface facing the above guide hole; and A pack housing comprising: a connection inlet surface that extends from the inner surface of the connection at a predetermined angle with respect to another direction opposite to the one direction, wherein the cross-sectional area of the guide hole on a plane perpendicular to the one direction becomes wider as it moves toward the other direction.
A preparation step for preparing a base plate and a side member that together form a receiving space; A cell mounting step of mounting a battery cell stack in the above receiving space; and After the cell mounting step, a cross member mounting step of inserting a cross member between the battery cell stacks; is included. The above side member includes an inner wall facing the receiving space and a guide holder protruding from the inner wall toward the receiving space to form a guide hole. A method for manufacturing a battery pack, wherein the step of mounting the cross member includes inserting the cross member into the guide hole.
In Paragraph 13, The above guide hole extends in one direction perpendicular to the base plate, and A method for manufacturing a battery pack, wherein the step of mounting the cross member further comprises inserting the cross member into the guide hole along the one direction.
In Paragraph 13, The above guide holder further includes an interference member provided in the guide hole that interferes with the cross member, and A method for manufacturing a battery pack, wherein the step of mounting the cross member further comprises inserting the cross member into the guide hole until the cross member is interfered with by the interference member within the guide hole.

Description

Pack Housing and Manufacturing Method of Battery Pack The present invention relates to a method for manufacturing a pack housing and a battery pack. Recently, as awareness of the crisis regarding the environment and the depletion of petroleum resources has increased, research and development of eco-friendly electric vehicles (EVs) has been gaining prominence. Electric vehicles include PHEVs (Plug-in Hybrid Electric Vehicles), BEVs (Battery Electric Vehicles), and FCEVs (Fuel Cell Electric Vehicles). Electric vehicles may include a pack housing that supports battery cells. Meanwhile, electric vehicles use battery cells as a power source, and recently, efforts to increase the capacity of the battery cells housed inside the pack housing have been ongoing. To improve the capacity of the battery cell, the battery cell can be housed inside a pack housing as a battery cell stack in the form of a CTP (Cell To Pack) rather than a module. Meanwhile, when the battery cell stack is mounted in the pack housing, a cross member or the like may be provided to support the surface pressure of the battery cell stack. In this regard, as the process of assembling cross members becomes easier, there is an increasing need for a simplified structure to stably support the cross members. FIG. 1 is an exploded perspective view of a battery pack according to one embodiment of the present invention. FIG. 2 is an enlarged view of a pack housing according to one embodiment of the present invention. FIG. 3 is an enlarged view of an inner wall and a guide holder according to one embodiment of the present invention. FIG. 4 is an enlarged view of a cross member inserted into a guide holder according to one embodiment of the present invention. FIG. 5 is a vertical cross-sectional view showing a cross member inserted into a guide holder according to one embodiment of the present invention. Figure 6 is an enlarged view of part A shown in Figure 5. FIG. 7 is a flowchart according to a method for manufacturing a battery pack according to one embodiment of the present invention. FIG. 8 is a perspective view of a pack housing in the preparation stage according to one embodiment of the present invention. FIG. 9 is a perspective view of a pack housing and a battery cell stack in the cell mounting step according to one embodiment of the present invention. FIG. 10 is an enlarged view of the guide holder and battery cell stack shown in FIG. 9. FIG. 11 is a perspective view of a pack housing and a battery cell stack in the cross member mounting step according to one embodiment of the present invention. FIG. 12 is an enlarged view of a cross member, etc. inserted into a guide holder shown in FIG. 11. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted. In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by such terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 12. FIG. 1 is an exploded perspective view of a battery pack according to an embodiment of the present invention. FIG. 2 is an enlarged view of a pack housing according to an embodiment of the present invention. FIG. 3 is an enlarged view of an inner wall and a guide holder according to an embodiment of the present invention. FIG. 4 is an enlarged view showing a cross member inserted into a guide holder according to an embodiment of the present invention. FIG. 5 is a vertical cross-sectional view showing a cross member inserted into a guide holder according to an embodiment of the present invention. FIG. 6 is an enlarged view of part A shown in FIG. 5. Referring to FIGS. 1 to 6, the battery pack (100) may include a battery cell stack (200), a pack cover (300), an electr