JP-2026514207-A - Battery pack

JP2026514207AJP 2026514207 AJP2026514207 AJP 2026514207AJP-2026514207-A

Abstract

The technical concept of the present invention provides a battery pack comprising a base frame, a cell block including a plurality of battery cells on the base frame, a cooling structure provided on the cell block and having a first cooling channel, and a heat transfer structure that thermally connects the cell block to the cooling structure and includes a plurality of thermal conductive pads attached to the cell block and a plurality of thermal conductive rails attached to the cooling structure, wherein the plurality of thermal conductive rails are arranged in a first direction on the cell block, and two adjacent thermal conductive rails overlap in a second direction.

Inventors

ホ，ナムフン
シン，ジュファン
キム，キヨン
ファン，インホ

Assignees

エルジーエナジーソリューションリミテッド

Dates

Publication Date: 20260507
Application Date: 20250331
Priority Date: 20240405

Claims (15)

Base frame and A cell block including a plurality of battery cells on the base frame, A cooling structure provided on the cell block and having a first cooling channel, A heat transfer structure is included, which thermally connects the cell block to the cooling structure and includes a plurality of heat conductive pads attached to the cell block and a plurality of heat conductive rails attached to the cooling structure. The plurality of thermally conductive rails are arranged in a first direction on the cell block, Of the aforementioned plurality of heat-conducting rails, two adjacent heat-conducting rails overlap in the second direction. Battery pack.
The battery pack according to claim 1, further comprising a first thermally conductive adhesive layer for attaching each of the plurality of thermally conductive rails to the cooling structure.
The base frame includes a second cooling channel, The system further includes a second thermally conductive adhesive layer for attaching each of the plurality of battery cells to the base frame. The battery pack according to claim 1.
Each of the aforementioned heat-conducting pads is attached to a corresponding one of the aforementioned battery cells. Each of the aforementioned plurality of thermal conductive rails is integrated with a corresponding one of the plurality of thermal conductive pads. The battery pack according to claim 1.
The plurality of heat-conducting rails each include a first plate and a second plate located at different levels from each other. The second plate of any two adjacent thermal conductive rails among the plurality of thermal conductive rails overlaps the remaining first plate of the two adjacent thermal conductive rails in the second direction. The battery pack according to claim 1.
The first plate overlaps one of the plurality of battery cells in the second direction, The second plate overlaps two of the plurality of battery cells in the second direction, The battery pack according to claim 5.
The cooling structure includes a first cooling plate and a second cooling plate separated by an opening in between, Each of the plurality of battery cells overlaps the opening in the second direction, The battery pack according to claim 1.
The cooling structure further includes a connecting plate extending between the first cooling plate and the second cooling plate, The first cooling plate includes a first channel configured to guide the cooling fluid in a first flow direction, The second cooling plate includes a second channel configured to guide the cooling fluid in a second flow direction opposite to the first flow direction, The connecting plate includes a third channel extending between the first channel of the first cooling plate and the second channel of the second cooling plate. The battery pack according to claim 7.
An inlet pipe is configured to transmit the cooling fluid to the first channel of the first cooling plate, and includes a first inlet channel communicating with the first channel of the first cooling plate, The present invention further includes an outlet pipe configured to discharge the cooling fluid to the outside, which includes a first outlet channel communicating with the second channel of the second cooling plate, The battery pack according to claim 8.
The base frame includes a second cooling channel, The inlet pipe further includes a second inlet channel that communicates with the inlet of the second cooling channel of the base frame, The outlet pipe further includes a second outlet channel that communicates with the outlet of the second cooling channel of the base frame. The battery pack according to claim 9.
Each of the aforementioned plurality of battery cells is: The opening of the cooling structure has a central part that overlaps in the second direction, The first cooling plate and the second cooling plate include an outer casing that overlaps in the second direction and to which electrode leads are connected, The battery pack according to claim 7.
The plurality of battery cells are arranged in the first direction, Each of the plurality of battery cells extends in a third direction perpendicular to the first and second directions. The battery pack according to claim 11.
An internal frame, which is placed on the base frame and positioned on one side of the cell block, The cooling structure further includes a fixing bracket for fixing the cooling structure to the internal frame, The battery pack according to claim 1.
A pack cover covering the cell block and the cooling structure, The cooling structure and the pack cover are further comprising a compressible pad provided between them, The battery pack according to claim 1.
A pack cover covering the cell block and the cooling structure, A bolt attached to the cooling structure and inserted into the hole in the pack cover, The pack cover further includes a nut fastened to the protruding portion of the bolt that protrudes from the pack cover, The battery pack according to claim 1.

Description

This invention relates to a battery pack. This application claims priority under Korean Patent Application No. 10-2024-0046509 dated April 5, 2024, and all content disclosed in the said Korean Patent Application is incorporated herein by reference. Unlike primary batteries, rechargeable batteries can be charged and discharged multiple times. Rechargeable batteries are widely used as an energy source for a variety of cordless devices, such as handsets, laptops, and cordless vacuum cleaners. In recent years, improvements in energy density and economies of scale have dramatically reduced the manufacturing cost per unit capacity of rechargeable batteries. As the driving range of battery electric vehicles (BEVs) increases to levels comparable to those of fuel-powered vehicles, the primary application of rechargeable batteries is shifting from mobile devices to mobility. As rechargeable batteries are used in mobility, the demand for their safety is increasing. Since accidents such as fires involving rechargeable batteries used in mobility can endanger the lives of drivers, research into technologies to improve the safety of rechargeable batteries is essential. This is a cross-sectional view showing a battery pack according to an exemplary embodiment of the present invention.This is a separated perspective view showing a portion of a cell assembly according to an exemplary embodiment of the present invention.A perspective view showing a part of a heat transfer structure according to an exemplary embodiment of the present invention.Separated perspective view showing a portion of a heat transfer structure according to an exemplary embodiment of the present invention.A perspective view showing a battery pack according to an exemplary embodiment of the present invention.A perspective view showing a portion of a battery pack according to an exemplary embodiment of the present invention.This is a perspective view showing a part of the cooling structure of a battery pack according to an exemplary embodiment of the present invention.A cross-sectional view showing a part of a battery pack according to an exemplary embodiment of the present invention.This is a cross-sectional view showing a method for manufacturing a battery pack according to an exemplary embodiment of the present invention.This is a cross-sectional view showing a method for manufacturing a battery pack according to an exemplary embodiment of the present invention.This is a cross-sectional view showing a method for manufacturing a battery pack according to an exemplary embodiment of the present invention.This is a cross-sectional view showing a method for manufacturing a battery pack according to an exemplary embodiment of the present invention. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. As a premise, terms and words used herein and in the claims should not be interpreted in a manner limited to their general or dictionary meanings, but rather in a manner consistent with the technical spirit of the present invention, based on the principle that inventors may appropriately define the concepts of terms in order to best describe their own invention. Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the invention; thus, there may be a variety of equivalents and modifications that can substitute for them at the time of filing. Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the invention, such detailed description will be omitted. The embodiments of the present invention are provided to more fully illustrate the invention to those skilled in the art; therefore, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or shown schematically for the sake of clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect their actual sizes and proportions. (First Embodiment) Figure 1 is a cross-sectional view showing a battery pack 10 according to an exemplary embodiment of the present invention. Figure 2 is a separated perspective view showing a part of a cell assembly 200 according to an exemplary embodiment of the present invention. Figure 3 is a perspective view showing a part of a heat transfer structure 250 according to an exemplary embodiment of the present invention. Figure 4 is a separated perspective view showing a part of a heat transfer structure 250 according to an exemplary embodiment of the present invention. Referring to Figures 1 to 4, the battery pack 10 may include a pack frame 100, a cell assembly 200, a cooling structure 400, pipes 500, and a compressible pad 710. The pack frame 100 can provide an internal space for housing