Battery module and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2021057689-A1
Application number	US-201916964474-A
Country	US
Kind code	A1
Filing date	Nov 19, 2019
Priority date	Dec 5, 2018
Publication date	Feb 25, 2021
Grant date	—

Abstract

A battery module including a battery cell stacked body in which a plurality of battery cells are adjacent each other in parallel and are stacked; a mono frame receiving the battery cell stacked body and including at least one opening opened in a length direction of the battery cell stacked body, and including an upper plate and a lower plate that are perpendicular to a stacked side of the battery cell stacked body and a pair of lateral plates in parallel to the stacked side of the battery cell stacked body; an external expansion controlling pad provided between the battery cell stacked body and the mono frame; and a heat radiating resin provided between the battery cell stacked body and the lower plate. The external expansion controlling pad includes two main bodies and two bridges connecting the two main bodies.

First claim

1 . A battery module comprising:
a battery cell stacked body including a plurality of battery cells stacked adjacent each other in parallel; a mono frame configured to receive the battery cell stacked body, the mono frame including at least one opening opened in a length direction of the battery cell stacked body, an upper plate and a lower plate that are perpendicular to a stacked side of the battery cell stacked body, and a pair of lateral plates in parallel to the stacked side of the battery cell stacked body; an external expansion controlling pad provided between the battery cell stacked body and the mono frame; and a heat radiating resin provided between the battery cell stacked body and the lower plate, wherein the external expansion controlling pad includes two main bodies covering opposite sides of the battery cell stacked body and provided between the battery cell stacked body and the pair of lateral plates, and two bridges connecting the two main bodies and provided along a side of the battery cell stacked body between the battery cell stacked body and the lower plate.

2 . The battery module of claim 1 , wherein
the heat radiating resin is provided in a space formed by the two main bodies and the two bridges.

3 . The battery module of claim 1 , wherein
the lower plate includes a plurality of injection holes for injecting the heat radiating resin.

4 . The battery module of claim 1 , wherein
the heat radiating resin is a thermal resin.

5 . The battery module of claim 1 , further comprising
a plurality of internal expansion controlling pads provided between adjacent battery cells of the plurality of battery cells.

6 . The battery module of claim 5 , wherein
the external expansion controlling pad and the plurality of internal expansion controlling pad include a polyurethane or an ethylene propylene diene monomer (EDPM).

7 . A method for manufacturing a battery module, comprising:
manufacturing a battery cell stacked body including a plurality of battery cells stacked adjacent to each other in parallel; forming an external expansion controlling pad including two main bodies for covering a pair of battery cells of the plurality of battery cells provided at outermost sides of the battery cell stacked body and two bridges connecting the two main bodies and provided along a side of the battery cell stacked body; inserting the battery cell stacked body on which the external expansion controlling pad is formed in a mono frame; and injecting a heat radiating resin into a space formed by the two main bodies and the two bridges between the mono frame and the battery cell stacked body.

8 . The method of claim 7 , wherein
when the heat radiating resin is injected, the two main bodies and the two bridges function as a dam for preventing the heat radiating resin from running down to an outside of the battery cell stacked body.

9 . The method of claim 7 , wherein
the mono frame includes at least one opening opened in a length direction of the battery cell stacked body, an upper plate and a lower plate that are perpendicular to a stacked side of the battery cell stacked body, and a pair of lateral plates in parallel to the stacked side of the battery cell stacked body, and the heat radiating resin is injected between the lower plate of the mono frame and the battery cell stacked body.

10 . The method of claim 9 , wherein
the injecting the heat radiating resin is performed while the battery module is disposed so that the lower plate faces upwards with respect to a gravity direction.

11 . The method of claim 9 , wherein
the lower plate includes a plurality of injection holes for injecting the resin.

Assignees

• Lg Chemical Ltd

Inventors

• Park Jinwoo
• Kim Tae Geun
• Seong Junyeob

Classifications

• H01M10/653 Primary

  characterised by electrically insulating or thermally conductive materials · CPC title

• H01M50/242

  adapted for protecting batteries against vibrations, collision impact or swelling · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M10/6551 Primary

  Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings · CPC title

• H01M50/20

  Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46) · CPC title