KR-20260066534-A - BATTERY ASSEMBLY AND BATTERY PACK INCLUDING THE SAME

Abstract

A battery assembly according to one embodiment of the present invention comprises: a battery cell stack having a plurality of battery cells stacked thereon; a housing including side portions and a bottom portion covering the side portions and bottom portion of the battery cell stack, respectively; and an inlet and an outlet for circulating a refrigerant into the housing. The battery cell stack is fixed to the housing.

Inventors

• 이정훈
• 엄태기

Assignees

• 주식회사 엘지에너지솔루션

Dates

Publication Date

20260512

Application Date

20241104

Claims (17)

1. A battery cell stack in which multiple battery cells are stacked; A housing comprising side portions and a bottom portion covering the sides and bottom portions, respectively, of the battery cell stack; and It includes an inlet and an outlet for circulating refrigerant into the housing; and A battery assembly in which the above battery cell stack is fixed to the housing.
2. In Paragraph 1, At least one cooling spacer is located at least one location among the plurality of battery cells above, and The cooling spacer includes a plurality of holes drilled along the direction of the side with the longer width of the battery cell, and A battery assembly in which the refrigerant can move through the plurality of holes.
3. In paragraph 2, The above cooling spacer is a battery assembly that contacts and is fixed to the lower portion of the housing.
4. In paragraph 2, A battery assembly in which the cooling spacer contacts and is fixed to the lower surface of the housing with foam tape.
5. In Paragraph 1, A battery assembly in which the side portions of the above housing each include first to fourth side portions covering four sides of the battery cell stack.
6. In Paragraph 1, The above housing is a battery assembly in which the above side portions and the above bottom portion are integrally injection molded.
7. In Paragraph 1, A battery assembly in which the inlet and the outlet are located on one of the side portions.
8. In Paragraph 1, The above inlet is located on one of the above side portions, and The above outlet is a battery assembly located on the other side portion opposite to the side portion where the above inlet is located.
9. In Paragraph 1, A battery assembly in which a terminal assembly electrically connected to the above battery cell stack is coupled to the side portion of the housing.
10. In Paragraph 9, The above terminal assembly is, Terminal bus bar; A gasket in contact with the side portion of the housing; and A bolt penetrating the terminal busbar and the gasket; A battery assembly including
11. In Paragraph 10, It further includes a busbar electrically connected to at least one of the above battery cells, and A battery assembly in which the above bolt is coupled to the above busbar, and the above battery cell stack and the above terminal assembly are electrically connected.
12. In paragraph 1, A connector assembly electrically connected to the above battery cell stack is coupled to the side portion of the housing, and The above connector assembly is, An LV (Low Voltage) connector that electrically connects the above battery cell stack and the BMS module; A connector that combines with a module connector; A printed circuit board connected to the above module connector; A gasket located between the connector assembly and the housing; and Connector assembly cover; A battery assembly including
13. In Paragraph 1, A battery assembly further comprising a top cover assembly covering the open upper surface of the housing.
14. In Paragraph 13, The above cooling spacer is a battery assembly that contacts and is fixed to the bottom of the above top cover assembly.
15. In Paragraph 13, The above top cover assembly is a battery assembly in which a metal layer and a plastic layer are formed by heterogeneous injection molding.
16. In Paragraph 13, The above top cover assembly comprises a metal layer and a plastic layer located below the metal layer, forming a battery assembly.
17. A battery pack comprising a battery assembly according to paragraph 1.

Description

Battery assembly and battery pack including the same The present invention relates to a battery assembly and a battery pack including the same, and more specifically, to a battery assembly and a battery pack including the same in which the structural stability and cooling performance of the battery cell stack are improved. With the technological development and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly rising. Accordingly, extensive research is being conducted on secondary batteries capable of meeting various requirements. Secondary batteries are attracting significant attention as an energy source not only for mobile devices such as mobile phones, digital cameras, and laptops, but also for power units such as electric bicycles, electric vehicles, and hybrid electric vehicles. Recently, with the increasing need for large-capacity secondary battery structures, including their utilization as energy storage sources, there is a growing demand for medium-to-large modular battery packs that aggregate battery modules in which multiple secondary batteries are connected in series or parallel. Meanwhile, when configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to configure a battery module consisting of at least one battery cell and to configure the battery pack by adding other components using at least one battery module. Since the battery cells constituting these medium-to-large battery modules are rechargeable secondary batteries, such high-output, high-capacity secondary batteries generate a significant amount of heat during the charging and discharging process. In this case, the heat emitted from multiple battery cells is aggregated within a confined space, which can cause the temperature to rise rapidly and severely. In other words, while battery modules consisting of stacked cells and battery packs equipped with such modules can achieve high output, it is not easy to dissipate the heat generated by the cells during charging and discharging. If heat dissipation from the battery cells is not properly achieved, cell degradation accelerates, leading to a shortened lifespan and an increased risk of explosion or ignition. Furthermore, battery modules included in vehicle battery packs are frequently exposed to direct sunlight and may be subjected to high-temperature conditions, such as during the summer or in desert regions. Additionally, because multiple battery modules are densely packed to extend a vehicle's driving range, flames or heat generated in a single module can easily propagate to neighboring modules, ultimately leading to the ignition or explosion of the battery pack itself. FIG. 1 is an exploded perspective view showing a battery assembly according to one embodiment of the present invention. Figure 2 is a plan view showing the battery assembly of Figure 1. Figure 3 is a plan view showing the battery assembly of Figure 1 viewed from a different angle than that of Figure 2. Figure 4 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of Figure 2. FIG. 5 is a cross-sectional view of a battery assembly according to another embodiment of the present invention. Figure 6 is an enlarged view showing the “B” portion of Figure 3. Figure 7 is a cross-sectional view showing a cross-section cut along the cutting line C-C' of Figure 2. FIG. 8 is a perspective view showing a terminal assembly according to one embodiment of the present invention. FIG. 9 is a perspective view showing the terminal assembly of FIG. 8 viewed from a different angle. FIG. 10 is a perspective view showing a connector assembly according to one embodiment of the present invention. FIG. 11 is a perspective view showing the connector assembly of FIG. 10 viewed from a different angle. FIG. 12 is a perspective view showing the coupling relationship between a top cover assembly and a housing according to one embodiment of the present invention. FIG. 13 is a perspective view showing a battery assembly according to another embodiment of the present invention. FIG. 14 is a plan view showing the battery assembly of FIG. 13. FIG. 15 is a plan view showing the battery assembly of FIG. 13 viewed from a different angle than FIG. 14. FIG. 16 is a cross-sectional view showing a cross-section cut along the cutting line B-B' of FIG. 14. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in