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KR-20260063833-A - A Battery Pack

KR20260063833AKR 20260063833 AKR20260063833 AKR 20260063833AKR-20260063833-A

Abstract

The present invention relates to a battery pack, specifically comprising: a frame portion including a main frame having a rectangular structure forming a storage space and a mounting die positioned at the longitudinal center of the main frame; a battery cell located in the storage space; a battery management unit connected to the battery cell and in close contact with the mounting die; a battery management unit cover located on one side of the battery management unit; and a first cover covering one side of the frame portion; wherein a cushioning member is located between the battery cell and the first cover.

Inventors

  • 손혁준

Assignees

  • 주식회사 엘지에너지솔루션

Dates

Publication Date
20260507
Application Date
20241031

Claims (10)

  1. A frame section comprising a main frame having a rectangular structure forming a plurality of symmetrical storage spaces, and a mounting die positioned at the center in the longitudinal direction of the main frame; A battery cell located in the above storage space; A battery management unit electrically connected to the above battery cell and having at least a portion of its other surface in close contact with the above mounting die; A battery management unit cover located on one side of the above-mentioned battery management unit; and A first cover covering one side of the above-mentioned frame portion; comprising, A battery pack characterized by having a cushion member positioned between the battery cell and the first cover.
  2. In paragraph 1, A battery pack characterized in that the cushion member comprises a heat-resistant material.
  3. In paragraph 2, A battery pack characterized in that the cushion member is in the shape of a pad that covers the entire inner side of the main frame.
  4. In paragraph 2, A battery pack characterized in that the cushion member comprises a silicone material.
  5. In paragraph 2, The above storage space includes a first storage space on one side of the mounting die and a second storage space on the other side of the mounting die, wherein a plurality of battery cells are located in the first storage space, A battery pack characterized in that the cushion member is in close contact with the upper surface of the plurality of battery cells located in the first storage space and the gap between the plurality of battery cells located in the first storage space.
  6. In paragraph 5, A battery pack characterized by the cushion member having a main body that is in close contact with the upper surface of a plurality of battery cells located in the first storage space, and a first auxiliary body that is extended a certain length from the other side of the main body toward the gap between the plurality of battery cells located in the first storage space.
  7. In paragraph 2, The above storage space includes a first storage space on one side of the mounting die and a second storage space on the other side of the mounting die, wherein a plurality of battery cells are located in the second storage space. A battery pack characterized in that the cushion member is in close contact with the upper surface of the plurality of battery cells located in the second storage space and the gap between the plurality of battery cells located in the second storage space.
  8. In Paragraph 7, A battery pack characterized by the cushion member having a main body that is in close contact with the upper surface of the plurality of battery cells located in the second storage space, and a first auxiliary body that is extended a certain length from the other side of the main body toward the gap between the plurality of battery cells located in the second storage space.
  9. In paragraph 5 or 7, A battery pack characterized in that the cushion member is in close contact with the upper surface of the battery management unit cover located on the mounting die.
  10. In Paragraph 9, A battery pack characterized in that the cushion member is provided with a second auxiliary body extending a certain length from the other side of the main body so as to face the upper surface of the battery management unit cover.

Description

Battery Pack The present invention relates to a battery pack, and more specifically, to a battery pack capable of reducing noise, improving impact resistance, and preventing or delaying the spread of heat or flame to nearby battery cells. Secondary batteries serve as an alternative energy source to fossil fuels that cause air pollutants, and are being applied to electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (P-HEVs), and energy storage devices (ESS). Currently, widely used types of battery cells include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. It is common practice to form battery modules by connecting multiple of these unit secondary battery cells in series or parallel, depending on the required output voltage or charge/discharge capacity. In particular, pouch-type lithium-ion batteries, which feature a structure in which a stacked or stacked/folded electrode assembly is embedded in a pouch-type battery case made of aluminum laminate sheets, are seeing a gradual increase in usage due to advantages such as low manufacturing costs and high energy density. Meanwhile, for portable devices such as laptops, tablets, and slim TVs, lightweight design is important, but they must also offer excellent safety against impacts or battery cell failures, and be free from noise during use. FIG. 1 is an exploded view of a battery pack for a laptop according to the prior art. As shown in FIG. 1, the battery pack includes a pair of battery cells (10), a frame (20) that houses the battery cells (10), a protection circuit module (30) that is seated in the center of the frame (20), an upper cover (40) that covers the upper surface of the frame (20), and a lower cover (50) that supports the lower surface of the frame (20). In the case of a battery pack according to the prior art, the upper and lower surfaces of the battery cell (10) and the protection circuit module (30) are simply wrapped by an upper cover (40) and a lower cover (50) in the shape of a sheet having adhesive applied to them. Therefore, a gap is likely to occur between the frame (20), the battery cell (10), and the protection circuit module (30), and this acts as a cause of friction noise when pressed or shaken during laptop use. Also, when an external force is applied from above, the upper surface cover (40) of the battery cell (10) and the protection circuit module (30) is in the shape of a thin sheet, so the applied external force is easily transmitted to the battery cell (10) and the protection circuit module (30), making it susceptible to damage. In addition, when an event occurs in the battery cell (10), the structure allows heat or flame to be easily transferred to the nearby battery cell (10). 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 the present invention viewed from above. FIG. 3 is a perspective view of the battery pack illustrated in FIG. 2, viewed from below. Figure 4 is an exploded view of the battery pack illustrated in Figure 2. FIG. 5 is a perspective view of a battery cell constituting the battery pack of the present invention. FIG. 6 is a perspective view taken from above of a frame portion constituting a battery pack of the present invention. FIG. 7 is an enlarged perspective view of the mounting die of the frame portion illustrated in FIG. 6. FIG. 8 is an enlarged plan view of the mounting die of the frame portion shown in FIG. 6. FIG. 9 is a perspective view taken from above of a battery management unit cover constituting the battery pack of the present invention. FIG. 10 is a perspective view of the battery management unit cover shown in FIG. 9, viewed upside down. FIG. 11 is a perspective view taken from above of a cushion member constituting a battery pack of the present invention. FIG. 12 is a perspective view of the cushion member illustrated in FIG. 11 viewed in reverse. FIG. 13 is a front view of the cushion member illustrated in FIG. 12. FIG. 14 is an enlarged plan view of a portion of the state in which a battery cell is seated on a frame portion constituting the battery pack of the present invention. 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