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KR-102963157-B1 - BATTERY DEVICE

KR102963157B1KR 102963157 B1KR102963157 B1KR 102963157B1KR-102963157-B1

Abstract

The present invention relates to a battery device, wherein the battery device of the present invention comprises a battery module and a protective paint. The battery module has an outer surface. The protective paint is attached to the outer surface of the battery module to reinforce the structural strength of the battery module.

Inventors

  • 료예상

Assignees

  • 주식회사 엘지에너지솔루션

Dates

Publication Date
20260508
Application Date
20211102

Claims (10)

  1. A battery module having an outer surface, and It includes a protective paint that is attached to the outer surface of the battery module to reinforce the structural strength of the battery module and forms a protective layer having elasticity. The above battery module includes a first case part and a second case part, and the first case part is assembled on the second case part to define the outer surface, and The second case section above includes a main body and a plurality of partitions, wherein the partitions are located within the main body and are connected to the main body to divide the main body into a plurality of receiving areas. A battery device characterized in that the above-described battery module includes a plurality of battery cells, and the battery cells are fixed on the second case portion and each is located within the receiving area.
  2. In paragraph 1, A battery device characterized by the above protective paint being attached to the outer surface of the above battery module by a spraying method.
  3. In paragraph 1, A battery device characterized in that the above protective paint is formed from a heat-resistant explosion-proof material.
  4. In paragraph 1, A battery device characterized in that the protective paint is a paint that does not contain organic solvents.
  5. delete
  6. In paragraph 1, A battery device characterized in that the material of the first case part and the material of the second case part each include metal or plastic.
  7. delete
  8. delete
  9. In paragraph 1, A battery device characterized in that the above-mentioned battery cells are each pouch battery cells or prismatic cells.
  10. In paragraph 1, A battery device characterized by the tensile strength of the protective paint being greater than 6600 PSI and the tear strength of the protective paint being greater than 780 LBS/in.

Description

Battery Device The present invention relates to electronic devices, and in particular to battery devices. Lithium-ion batteries are widely used as energy sources for various electronic products and mobile devices due to their advantages in high energy density and operating voltage. When classified by external shape, they are divided into pouch cells, cylindrical batteries, and hard-case prismatic batteries. Currently, pouch cells are gaining popularity because the shape of the pouch cell can be easily changed by designing and adjusting the size of the electrode groups stacked inside. Furthermore, since the external battery case can easily accommodate the size structure of the electrode groups, pouch cells are highly suitable for use in consumer electronic products and mobile devices. Typically, the system body equipped with the battery module undergoes drop testing to ensure that the module does not shift due to normal impact, thereby preventing a situation where it fails to supply power normally to other electronic components. Under current designs, the battery module is secured to the system body's case by passing it through a plastic case using screws. However, during drop testing, the battery module is damaged because the plastic is vulnerable to impact and the screw holes installed at the corners can easily rupture or deform due to stress concentration. Furthermore, during high-temperature and high-humidity tests conducted prior to product shipment, the protruding ribs between two adjacent pouch cells and the adhesive layer between the bottom of the pouch cell and the case limit the thermal expansion space of the pouch cell. Consequently, the pouch cell undergoes severe deformation after these tests, affecting the reliability of the battery device. FIG. 1 is a three-dimensional perspective view of a battery device according to one embodiment of the present invention, and Figure 2 is a local three-dimensional exploded perspective view of the battery device according to Figure 1. In order to make the above features and advantages of the present invention clearer and easier to understand, a detailed description is provided below in conjunction with examples and drawings. FIG. 1 is a three-dimensional perspective view of a battery device according to one embodiment of the present invention, and FIG. 2 is a local three-dimensional exploded perspective view of the battery device according to FIG. 1. First, referring to FIG. 1, in this embodiment, the battery device (100) includes a battery module (110) and a protective paint (120). The battery module (110) has an outer surface (113). The protective paint (120) is attached to the outer surface (113) of the battery module (110) to reinforce the structural strength of the battery module (110). FIG. 2 is an exploded view of a battery module (110) with protective paint (120) already attached, so that it is convenient to explain the formation of the constituent elements of the battery module (110) and the outer surface (113). Specifically, referring to FIG. 1 and FIG. 2 simultaneously, in this embodiment, the battery module (110) is rectangular, and the battery module (110) includes a first case part (112) and a second case part (114). The first case part (112) is assembled on the second case part (114) to define the outer surface (113). That is, the outer surface (113) according to this embodiment is actually composed of the outer surface of the first case part (112) and the outer surface of the second case part (114) that is exposed outside the first case part (112). In addition to the connecting elements (e.g., cable connectors, etc.) installed on the battery module (110), protective paint (120) is applied to all visible surfaces of the battery module (110). In one embodiment, the first case part (112) is formed by bending a metal piece, etc., which can effectively reduce costs, and the metal piece may be a galvanized steel sheet or a stainless steel sheet, but is not limited thereto. In another embodiment, the material of the first case part (112) may be plastic, but is not limited thereto. In addition, the second case part (114) according to the present embodiment includes a main body (115) and a plurality of partitions (117) (exemplarily showing two partitions (117)). A partition (117) is located within the main body (115) and connected to the main body (115) to divide the main body (115) into multiple receiving areas (A) (e.g., three receiving areas (A) shown). The material of the second case part (114) may be metal or plastic, but is not limited thereto. In addition, the battery module (110) includes multiple battery cells (116), and the battery cells are fixed on the second case part (114) and each is located within a receiving area (A). Here, the battery cells (116) are each pouch battery cells or prismatic battery cells, but are not limited thereto. In this embodiment, the battery module (110) is, for example, an embedded packaging structure, and the pr