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KR-102962896-B1 - A Battery Pack Having Excellent Impact Resistance

KR102962896B1KR 102962896 B1KR102962896 B1KR 102962896B1KR-102962896-B1

Abstract

The present invention relates to a battery pack with excellent impact resistance, specifically comprising: a frame portion including a rectangular outer frame forming a storage space and a support frame located on the inner side of one edge of the outer frame; a battery cell stored in the storage space; a BMU electrically connected to the battery cell with one side facing the upper surface of the support frame; and a BMU cover having a cover plate located on the other side of the BMU; wherein the support frame is composed of a first seating portion and a second seating portion thicker than the first seating portion.

Inventors

  • 장재영
  • 손혁준
  • 이진현
  • 정대호

Assignees

  • 주식회사 엘지에너지솔루션

Dates

Publication Date
20260508
Application Date
20230213

Claims (11)

  1. A frame portion comprising a rectangular outer frame forming a storage space, and a support frame positioned along the longitudinal direction on the inner side of one edge of the outer frame; A battery cell stored in the above storage space; A BMU electrically connected to the battery cell with one side facing the upper surface of the support frame; and A BMU cover equipped with a cover plate located on the other side of the BMU; comprising, The above frame portion is further provided with one or more first ribs extending along the width direction with one side connected to the outer frame, and a second rib having a double rib structure located along the longitudinal edge of the support frame and connected to the other side of the first rib. The above support frame is composed of a first seating portion and a second seating portion that is thicker than the first seating portion, and A battery pack characterized in that a first opening is formed in the first seating portion and the terminal of the battery cell is seated thereon.
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  4. In paragraph 1, A battery pack characterized in that a printed circuit board of the BMU is mounted on the second mounting portion.
  5. In paragraph 1, A battery pack characterized by having a plurality of receiving portions along the length direction and/or width direction on the upper surface of the support frame, and a plurality of insertion portions that are inserted into the receiving portions on the cover plate.
  6. In paragraph 5, The above receiving portion is provided on one edge in the width direction of the support frame and is a first receiving portion comprising a first receiving plate having a first fastening hole, positioned at a certain distance from the inner surface of an outer frame having a certain height, and a first connecting portion connecting the first receiving plate and the outer frame. A battery pack characterized in that the above insertion part comprises a first insertion plate extending vertically from one edge in the width direction of the cover plate, and a first hook formed on the inner surface of the first insertion plate and fastened to the first fastening hole.
  7. In paragraph 6, The above receiving portion is provided on one longitudinal edge of the support frame and is a second receiving portion comprising a second receiving plate having a second fastening hole, positioned at a certain distance from the inner surface of an outer frame having a certain height, and a pair of second connecting portions connecting the second receiving plate and the outer frame. A battery pack characterized in that the insert portion comprises a second insert portion including a second insert plate extending vertically from the edge of the cover plate, and a second hook formed on the inner surface of the second insert plate and fastened to the second fastening hole.
  8. In paragraph 6, The above receiving portion is provided on the other edge in the width direction of the support frame and is a third receiving portion comprising a third receiving plate having a third fastening hole, positioned at a certain distance from the inner surface of an outer frame having a certain height, and a third connecting portion connecting the third receiving plate and the outer frame. A battery pack characterized in that the above insertion part comprises a third insertion plate extending vertically from the other edge in the width direction of the cover plate, and a third hook formed on the inner surface of the third insertion plate and fastened to the third fastening hole.
  9. In paragraph 1, A battery pack characterized in that the second rib is a grid structure.
  10. In paragraph 1, A battery pack characterized by having a third rib intersecting along the width direction and/or length direction on the inner surface of the cover plate facing the BMU side.
  11. In Paragraph 10, A battery pack characterized by having one or more second openings formed in the above-mentioned cover plate.

Description

A Battery Pack Having Excellent Impact Resistance The present invention relates to a battery module with excellent impact resistance, and specifically, to a battery module with excellent impact resistance that can minimize damage to the BMU by preventing the battery pack from bending due to external force. 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 being closely utilized in daily life, such as in mobile devices, electric vehicles, and hybrid electric vehicles. 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 cells, or battery packs equipped with multiple such modules. On the other hand, if the device is a tablet PC, a portable slim TV, or a portable laptop, lightweight design is important, but it must also be resistant to impact. FIG. 1 is an exploded view of a battery pack according to the prior art. As shown in FIG. 1, the battery pack includes a battery cell (20), a protection circuit module (30) electrically connected to an electrode tab extending from the battery cell, a protection circuit module cover (50), and a first pressure rib (40) that protrudes in the opposite direction from the cell receiving portion formed in the frame (10) for receiving the battery cell and presses the electrode tab and the protection circuit module in a direction facing each other. However, in the case of a battery pack according to the prior art, since it has a rectangular structure in which multiple battery cells are arranged side by side, it is a structure that is prone to bending due to external forces in the longitudinal direction. FIG. 1 is an exploded perspective view of a battery pack according to the prior art. FIG. 2 is a perspective view of a battery pack according to a preferred embodiment of the present invention, viewed from one direction. FIG. 3 is an exploded view of the battery pack illustrated in FIG. 2. FIG. 4 is a perspective view of a battery cell constituting the battery pack of the present invention. FIG. 5 is a perspective view of a frame portion constituting a battery pack of the present invention, viewed from one direction. FIG. 6 is a perspective view of the frame portion illustrated in FIG. 5 viewed from another direction. Fig. 7 is an enlarged perspective view of part A of Fig. 5. Fig. 8 is an enlarged perspective view of part B of Fig. 5. Fig. 9 is an enlarged perspective view of section C of Fig. 5. FIG. 10 is a perspective view taken from above of a BMU cover constituting the battery pack of the present invention. FIG. 11 is a perspective view of the BMU cover shown in FIG. 10 viewed upside down. FIG. 12 is a front view of the BMU cover illustrated in FIG. 10. Fig. 13 is an enlarged perspective view of part A of Fig. 11. Fig. 14 is an enlarged perspective view of part B of Fig. 11. Fig. 15 is an enlarged perspective view of part C of Fig. 11. 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. In addition, the X-axis direction indicated in the drawing is defined as the length direction, the Y-axis direction as the width direction, and the Z-axis direction as the height direction. Additionally, one face and the other face are surfaces facing each other when viewed from the Z-axis direction, and one side face and the other side face refer to sides facing each other when viewed from the X-axis or Y-axis direction. Hereinafter, a battery pack with excellent impact resistance according to the present invention will be described with reference to the attached drawi