KR-20260063794-A - BATTERY ASSEMBLY AND DEVICE INCLUDING THE SAME

Abstract

A battery assembly according to one embodiment of the present invention comprises: a battery cell unit comprising a battery cell stack including a plurality of battery cells and a side beam covering one side of the battery cell stack; and a cross beam for setting the position of the battery cell unit; wherein the cross beam may include a guide pin coupled to the side beam.

Inventors

• 이순오
• 최규현
• 정창권
• 김병용
• 이승준
• 허남훈
• 황인호

Assignees

• 주식회사 엘지에너지솔루션

Dates

Publication Date

20260507

Application Date

20241031

Claims (12)

1. A battery cell unit comprising a battery cell stack including a plurality of battery cells and a side beam covering one side of the battery cell stack; and A cross beam for setting the position of the above battery cell unit; A battery assembly in which the cross beam includes a guide pin that is coupled to the side beam.
2. In Paragraph 1, A battery assembly further comprising a pad disposed between the battery cell stack and the side beam.
3. In Paragraph 1, A battery assembly in which the above-mentioned side beam covers one side of the battery cell stack while pressing the battery cell stack.
4. In Paragraph 1, A battery assembly in which the above-mentioned side beam includes a fastening hole to which the above-mentioned guide pin is coupled.
5. In Paragraph 4, The above-mentioned fastening hole has a slot shape, in a battery assembly.
6. In Paragraph 4, The above fastening hole is formed across the upper and lower portions of the side beam, in a battery assembly.
7. In Paragraph 4, A battery assembly in which the above-mentioned fastening holes are arranged so that the above-mentioned guide pins can be inserted.
8. In paragraph 1, The above guide pin is a battery assembly without screw threads.
9. In Paragraph 1, The above cross beam is a battery assembly including a rib structure.
10. In paragraph 1, The above guide pins are provided in multiple numbers, and A battery assembly in which a plurality of the above-mentioned guide pins are spaced apart along the direction in which the cross beam extends.
11. In Paragraph 10, A battery assembly, some of the above guide pins located at both ends of the cross beam.
12. A device comprising a battery assembly according to paragraph 1.

Description

Battery assembly and device including the same The present invention relates to a battery assembly and a device including the same, and more specifically, to a battery assembly and a device including the same in which assembly stability is improved through position fixation and shock absorption of a battery cell stack. In modern society, as the use of portable devices such as mobile phones, laptops, camcorders, and digital cameras has become commonplace, the development of technologies related to such mobile devices is becoming active. Furthermore, rechargeable secondary batteries are being utilized as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) as a solution to address air pollution caused by conventional gasoline vehicles using fossil fuels; consequently, the need for the development of secondary batteries is increasing. Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density. These lithium secondary batteries can primarily use lithium-based oxides and carbon materials as positive and negative active materials, respectively. The lithium secondary battery may comprise an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and a battery case that seals and houses the electrode assembly together with an electrolyte. Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet. In the case of secondary batteries used in small devices, 2 to 3 battery cells are arranged, whereas in the case of secondary batteries used in medium to large devices such as automobiles, a battery assembly (battery module) in which multiple battery cells are electrically connected is used. In such a battery assembly, capacity and output are improved by connecting multiple battery cells in series or parallel to form a stack of battery cells. In addition, one or more battery assemblies can be mounted together with various control and protection systems, such as a Battery Disconnect Unit (BDU), a Battery Management System (BMS), and a cooling system, to form a battery assembly. There is a problem in that the positions of battery cells may shift or they may deform due to external shocks and vibrations during the battery assembly process. To resolve this issue, structural improvements are required to secure the battery cells and absorb external shocks. FIG. 1 is a perspective view showing a battery assembly according to one embodiment of the present invention. Figure 2 is an exploded perspective view showing the battery cell unit of Figure 1. FIG. 3 is a perspective view showing the battery cell unit of FIG. 2. Figure 4 is an exploded perspective view showing the battery assembly of Figure 1. Figure 5 is a plan view showing the battery assembly of Figure 1. Figure 6 is a plan view showing the battery cell unit of Figure 3. FIG. 7 is a perspective view showing the battery cell unit of FIG. 3 viewed from a different angle. FIG. 8 is a cross-sectional perspective view showing a cross section cut along the cutting line A-A' of FIG. 5. Figure 9 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of Figure 5. Figure 10 is a partial drawing showing an enlarged view of section “B” of Figure 5. Hereinafter, various embodiments of the present invention may 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 may be used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, when a part such as a layer, membrane, region, or plate is said to be "on" or "on" another part, this may include n