Battery module and battery pack including the same

Patent metadata

Field	Value
Publication number	US-2024380019-A1
Application number	US-202218289781-A
Country	US
Kind code	A1
Filing date	Jul 20, 2022
Priority date	Jul 29, 2021
Publication date	Nov 14, 2024
Grant date	—

Abstract

A battery module according to an embodiment of the present invention includes: at least one battery cell assembly including a plurality of cylindrical battery cells arranged in a state that side surfaces are adjacent to each other; a case accommodating the battery cell assembly; a fixing resin layer disposed to at least one side of the length direction ends of a plurality of cylindrical battery cells and fixing a plurality of cylindrical battery cells; and a thermal transmission resin layer formed between the fixing resin layer and the case and between the side of the battery cell assembly and the case, and in contact with the fixing resin layer and the case.

First claim

1 . A battery module, comprising:
at least one battery cell assembly including a plurality of cylindrical battery cells, wherein side surfaces of the plurality of cylindrical battery cells are adjacent to each other; a case accommodating the at least one battery cell assembly; a fixing resin layer disposed at at least one side of ends of the plurality of cylindrical battery cells and fixing e the plurality of cylindrical battery cells, wherein the ends are in a length direction; and a thermal transmission resin layer formed between the fixing resin layer and the case, and between a side of the at least one battery cell assembly and the case, and in contact with the fixing resin layer and the case.

2 . The battery module of claim 1 , wherein
the at least one battery cell assembly further includes an intermediate case surrounding the side surfaces of the plurality of cylindrical battery cells.

3 . The battery module of claim 2 , wherein
the thermal transmission resin layer is also formed between the intermediate case and the case.

4 . The battery module of claim 1 , wherein
the case is in a form of tube in which upper and lower portions are opened, respectively, and an upper cover and a lower cover are disposed at the upper and lower portions, respectively.

5 . The battery module of claim 4 , wherein
the upper cover includes a plurality of resin injection holes for injecting a thermal transmission resin for forming the thermal transmission resin layer.

6 . The battery module of claim 5 , wherein
the plurality of resin injection holes are formed adjacent to the case.

7 . The battery module of claim 4 , wherein
the upper cover includes at least one first protrusion part that is inserted and coupled to an inside of the case and protruded from a side of the upper cover toward the case.

8 . The battery module of claim 2 , wherein
the intermediate case includes at least one second protrusion part protruded toward the case from an exterior surface of the intermediate case.

9 . The battery module of claim 2 , wherein
the case includes at least one third protrusion part protruded from an inner surface of the case toward the intermediate case.

10 . The battery module of claim 4 , wherein
the upper cover is inserted and coupled to an inside of the case, and the case includes at least one fourth protrusion part protruded from an inner surface of the case toward the upper cover.

11 . A battery pack comprising the at least one-battery module of claim 1 .

Assignees

• Lg Energy Solution Ltd

Inventors

• Kim Hee Gyu
• Choi bum
• Choi Seungbin

Classifications

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• H01M50/213

  adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) · CPC title

• H01M50/264

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title

• H01M10/643 Primary

  Cylindrical cells · CPC title

• H01M10/613 Primary

  Cooling or keeping cold · CPC title