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EP-4401215-B1 - BATTERY MODULE

EP4401215B1EP 4401215 B1EP4401215 B1EP 4401215B1EP-4401215-B1

Inventors

  • CHANG, Wei-yuan
  • LIAO, YU-HSIANG

Dates

Publication Date
20260506
Application Date
20230424

Claims (10)

  1. A battery module (100), comprising: a battery assembly (110) having an outer surface (S), and a protection assembly (120) configured to cover the outer surface (S) of the battery assembly (110) and including an adhesive layer (L2), a support layer (L1) and a metal coating layer (L3), wherein the adhesive layer (L2) and the metal coating layer (L3) are located at opposite sides of the support layer (L1), respectively, and the adhesive layer (L2) is adhered to the outer surface (S), such that the metal coating layer (L3) is positioned at an outermost side of the battery module (100).
  2. The battery module according to claim 1, wherein the outer surface (S) includes a first surface (S1), a second surface (S2), and a peripheral surface (S3) connecting the first surface (S1) and the second surface (S2), the protection assembly (120) includes a first protection sheet (122) and a second protection sheet (124), the first protection sheet (122) covers the first surface (S1) and extends along the peripheral surface (S3) to cover the second surface (S2), the first protection sheet (122) has an opening (123), the opening (123) partially exposes the second surface (S2), and the second protection sheet (124) covers the first protection sheet (122) located on the second surface (S2) and the second surface (S2) exposed by the opening (123).
  3. The battery module according to claim 2 wherein an edge (E1) of the first protection sheet (122) located on the peripheral surface (S3) matches an edge (E2) of the second protection sheet (124).
  4. The battery module according to claim 1, wherein the metal coating layer (L3) includes a tin layer.
  5. The battery module according to claim 1, wherein the material of the support layer (L1) includes PET.
  6. The battery module according to claim 1, wherein a first thickness (T1) of the support layer (L1) is greater than a second thickness (T2) of the adhesive layer (L2), and the second thickness (T2) of the adhesive layer (L2) is greater than a third thickness (T3) of the metal coating layer (L3).
  7. The battery module according to claim 1, wherein the thickness (T3) of the metal coating layer (L3) is greater than o and less than or equal to 0.004 mm.
  8. The battery module according to claim 1, wherein the battery assembly (110) includes a support structure (112) and at least one battery unit (114), the support structure (112) supports the at least one battery unit (114), and the protection assembly (120) is at least partially in direct contact with the support structure (112) and at least partially in direct contact with the battery unit (114).
  9. The battery module according to claim 8, wherein at least one free space (A) is provided between the support structure (112) and the at least one battery unit (114).
  10. The battery module according to claim 8, wherein the at least one battery unit (114) includes at least one soft pack battery cell.

Description

TECHNICAL FIELD The present disclosure relates to an electronic component, more particularly, to a battery module. BACKGROUND ART A portable electronic product includes a battery module to supply necessary power. In some electronic products, in order to arrange the structure for antenna signal transmission and ESD (Electro Static Discharge) protection in a limited space, a conductive tape or metal layer is attached to the battery module to be used as an antenna signal transmission path or an ESD grounding path. However, in this case, the thickness of the battery module increases, which violates the trend of thin design of electronic products. The document KR 2022 0101 991 A discloses a battery module with a conductive protective layer exposed through an insulating layer opening for antenna or ESD grounding. DISCLOSURE Technical Problem The present disclosure is designed to solve the problems of the related art, and therefore the present disclosure is directed to providing a battery module having an electrostatic protection function by providing an antenna signal transmission path or an ESD grounding path without increasing the thickness. Technical Solution A battery module according to the present disclosure includes a battery assembly and a protection assembly. The battery assembly has an outer surface. The protection assembly covers the outer surface of the battery assembly, and the protection assembly includes an adhesive layer, a support layer and a metal coating layer. The adhesive layer and the metal coating layer are located at opposite sides of the support layer, respectively, and the adhesive layer is adhered to the outer surface, such that the metal coating layer is positioned at an outermost side of the battery module. In an embodiment of the present disclosure, the outer surface may include a first surface, a second surface, and a peripheral surface connecting the first surface and the second surface. The protection assembly may include a first protection sheet and a second protection sheet. The first protection sheet may cover the first surface and extend along the peripheral surface to cover the second surface. The first protection sheet may have an opening, the opening may partially expose the second surface. The second protection sheet may cover the first protection sheet located on the second surface and the second surface exposed by the opening. In an embodiment of the present disclosure, an edge of the first protection sheet located on the peripheral surface may match an edge of the second protection sheet. In an embodiment of the present disclosure, the metal coating layer may include a tin layer. In an embodiment of the present disclosure, the material of the support layer may include PET. In an embodiment of the present disclosure, a first thickness of the support layer may be greater than a second thickness of the adhesive layer, and the second thickness of the adhesive layer may be greater than a third thickness of the metal coating layer. In an embodiment of the present disclosure, the thickness of the metal coating layer may be greater than 0 and less than or equal to 0.004 mm. In an embodiment of the present disclosure, the battery assembly may include a support structure and at least one battery unit, the support structure may support the at least one battery unit, and the protection assembly may be at least partially in direct contact with the support structure and at least partially in direct contact with the battery unit. In an embodiment of the present disclosure, at least one free space may be provided between the support structure and the at least one battery unit. In an embodiment of the present disclosure, the at least one battery unit may include at least one soft pack battery cell. Advantageous Effects According to the above, in the battery module according to the present disclosure, the protection assembly surrounds the outer surface of the battery assembly, and the protection assembly including an adhesive layer, a support layer and a metal coating layer is adhered to the outer surface of the battery assembly through the adhesive layer so that the metal coating layer is located at the outermost side of the battery module. Through this, the metal coating layer serves as an antenna signal transmission path or an ESD ground path, so it is not necessary to separately attach a conductive tape or metal layer to the battery module to provide an electrical path. Therefore, the battery module according to the present disclosure may have an electrostatic protection function without increasing the thickness. DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a battery module according to an embodiment of the present disclosure. BEST MODE In order to understand the features and advantages of the present disclosure more clearly and easily, a detailed description is provided in conjunction with the drawings through the following embodiment. The present disclosure can