Pad for battery module and battery module

Patent metadata

Field	Value
Publication number	US-2026088396-A1
Application number	US-202519267495-A
Country	US
Kind code	A1
Filing date	Jul 11, 2025
Priority date	Sep 23, 2024
Publication date	Mar 26, 2026
Grant date	—

Abstract

The present disclosure relates to a pad for a battery module. The pad includes a laminate including a first polymer member, a buffer member disposed on the first polymer member, and a second polymer member disposed on the buffer member, wherein the first polymer member and the second polymer member have a porous lattice structure.

First claim

What is claimed is:

1 . A pad for a battery module, the pad comprising:
a laminate including
a first polymer member,
a buffer member disposed on the first polymer member, and
a second polymer member disposed on the buffer member,
wherein the first polymer member, the second polymer member and the buffer member have a porous structure, and an average size of pores in the first polymer member is larger than an average size of pores in the buffer member or an average size of pores in the second polymer member is larger than the average size of the pores in the buffer member, and the first polymer member and the second polymer member have a lattice structure.

2 . The pad of claim 1 , wherein:
the first polymer member and the second polymer member have a structure of a plurality of porous lattice structures laminated in a thickness direction, and a shape of each porous lattice structure of the plurality of porous lattice structures is the same.

3 . The pad of claim 1 , wherein:
the first polymer member and the second polymer member have a pore area ratio per unit area perpendicular to a thickness direction greater than the pore area ratio per unit area perpendicular to a lateral direction.

4 . The pad of claim 1 , wherein:
the first polymer member and the second polymer member are positioned so that a plane perpendicular to a thickness direction is in contact with a battery cell.

5 . The pad of claim 1 , wherein:
when the pad for the battery module is heated, an amount of heat transfer in a lateral direction is greater than an amount of heat transfer in a thickness direction.

6 . The pad of claim 3 , wherein:
a pore area ratio per unit area of a surface perpendicular to the thickness direction is 50% or more.

7 . The pad of claim 3 , wherein:
a pore area ratio per unit area of a surface perpendicular to the lateral direction is 45% or less.

8 . The pad of claim 1 , wherein:
a thickness of the buffer member is 30% to 70% of an entire thickness of the pad for the battery module.

9 . The pad of claim 1 , wherein:
a ratio of a thickness of the first polymer member and a thickness of the second polymer member (first polymer member:second polymer member) is 4:6 to 6:4.

10 . The pad of claim 1 , wherein:
the buffer member includes polyurethane foam, polypropylene foam, polystyrene foam, polyethylene foam, or a combination thereof.

11 . The pad of claim 1 , wherein:
the first polymer member includes polydimethylsiloxane (PDMS), Ecoflex, thermoplastic Polyurethane (TPU), or a combination thereof.

12 . The pad of claim 1 , wherein:
the second polymer member includes polydimethylsiloxane (PDMS), Ecoflex, thermoplastic Polyurethane (TPU) or a combination thereof.

13 . A battery module, comprising:
a cell laminate in which a plurality of battery cells is stacked; and a pad for the battery module positioned between at least one pair of adjacent battery cells of the plurality of battery cells, and the pad for the battery module is a laminate including
a first polymer member,
a buffer member disposed on the first polymer member, and
a second polymer member disposed on the buffer member,
wherein the first polymer member, the second polymer member, and the buffer member have a porous structure, and
an average size of pores in the first polymer member and an average size of pores the second polymer member is larger than an average size of pores in the buffer member, and
the first polymer member and the second polymer member have a lattice structure.

14 . The battery module of claim 13 , wherein:
the first polymer member and the second polymer member have a plurality of porous lattice structures laminated in a thickness direction, and wherein a shape of each porous lattice structure of the plurality of porous lattice structures is the same.

15 . The battery module of claim 13 , wherein:
the first polymer member has a pore area ratio per unit area perpendicular to a thickness direction greater than the pore area ratio per unit area perpendicular to a lateral direction.

16 . The battery module of claim 13 , wherein:
the second polymer member has a pore area ratio per unit area perpendicular to a thickness direction greater than the pore area ratio per unit area perpendicular to a lateral direction.

17 . The battery module of claim 13 , wherein:
the first polymer member is positioned so that a plane perpendicular to a thickness direction is in contact with a battery cell.

18 . The battery module of claim 13 , wherein:
the second polymer member is positioned so that a plane perpendicular to a thickness direction is in contact with the battery cell.

19 . The battery module of claim 13 , wherein:
the first polymer member includes polydimethylsiloxane (PDMS), Ecoflex, thermoplastic Polyurethane (TPU), or a combination thereof.

20 . The battery module of claim 13 , wherein:
the second polymer member includes polydimethylsiloxane (PDMS), Ecoflex, thermoplastic Polyurethane (TPU), or a combination thereof.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Univ Hanyang Ind Univ Coop Found

Inventors

• Lim Jaeyoung
• Han Yongha
• So Hongyun
• Bang Joohyung
• Chun Byungkwon

Classifications

• B32B5/18

  characterised by features of a layer {of} foamed material · CPC title

• B32B2266/0214

  Materials belonging to B32B27/00 · CPC title

• B32B2307/7376

  Thickness · CPC title

• B32B2457/10

  Batteries · CPC title

• B32B7/022

  Mechanical properties · CPC title