Battery module

Patent metadata

Field	Value
Publication number	US-12418061-B2
Application number	US-202017428869-A
Country	US
Kind code	B2
Filing date	Jun 18, 2020
Priority date	Nov 26, 2019
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A battery module includes a bottom plate to support a cell stack; a busbar frame having a lower end portion bent in an inward direction along an upper surface of the bottom plate and mounted on the front and rear sides of the cell stack; a thermally conductive resin applied to the upper surface of the bottom plate; and a fence member provided at an end of the lower end portion of the busbar frame and disposed on the upper surface of the bottom plate to prevent the leakage of the thermally conductive resin.

First claim

What is claimed is:

1. A battery module comprising:
a cell stack including a plurality of pouch-type secondary batteries stacked along a stacking dimension;
a first busbar frame mounted on a first end of the cell stack, the first end of the cell stack being opposite to a second end of the cell stack along a first dimension;
a support plate made of a thermally conductive material, the support plate supporting the cell stack on one side of the cell stack in a second dimension orthogonal to the first dimension;
a thermally conductive resin applied on an inner surface of the support plate between the cell stack and the support plate; and
a first fence member disposed along the support plate outside of the thermally conductive resin in the first dimension, the first fence member defining a linear boundary abutting and extending along the inner surface of the support plate in the stacking dimension so as to prevent the thermally conductive resin from leaking out past the linear boundary along the first dimension when the cell stack is placed on the support plate, wherein the linear boundary has a length along the stacking dimension that spans a length of the cell stack along the stacking dimension, and wherein the first fence member has a height along the second dimension that is less than a height of the first busbar frame along the second dimension,
wherein the first busbar frame has an end portion extending in the first dimension inwardly towards a center of the support plate along the inner surface of the support plate, and
wherein the first fence member is located at an end of the end portion of the first busbar frame and is positioned on the inner surface of the support plate.

2. The battery module according to claim 1 , wherein the pouch-type secondary batteries each include:
a cell body in which an electrode assembly is surrounded by a pouch case; and
a cell terrace formed outside of the cell body by heat fusion of the pouch case,
wherein the first fence member is disposed outside of the cell body.

3. The battery module according to claim 2 , wherein the first fence member has an insertion groove which receives at least a portion of the cell terrace.

4. The battery module according to claim 2 , wherein the cell terrace includes a cut portion to prevent contact with a part of the first fence member extending away from the support plate in the second dimension.

5. The battery module according to claim 2 , further comprising:
a second busbar frame positioned at the second end of the cell stack; and
a second fence member provided at an end portion of the second busbar frame.

6. The battery module according to claim 5 , further comprising:
a resin isolating member disposed between the first fence member and the second fence member on the inner surface of the support plate, the resin isolating member protruding from the inner surface of the bottom plate and extending longitudinally along the bottom plate in the stacking dimension, wherein
the thermally conductive resin is applied between the resin isolating member and the first fence member, and the thermally conductive resin is applied between the resin isolating member and the second fence member.

7. The battery module according to claim 1 , wherein the first fence member has a height along the second dimension that is greater than a thickness of the thermally conductive resin applied to the inner surface of the support plate.

8. The battery module according to claim 1 , wherein the thermally conductive resin has adhesive and thermoplastic properties.

9. The battery module according to claim 1 , wherein the first fence member comprises a foam or a rubber pad attached to the end portion of the busbar frame.

10. A battery pack comprising the battery module according to claim 1 .

11. An electric vehicle comprising the battery module according to claim 1 .

12. The battery module according to claim 1 , wherein the stacking dimension is orthogonal to both the first dimension and the second dimension.

13. The battery module according to claim 1 , wherein the first busbar frame has a planar portion extending along the stacking dimension and along the second dimension, the planar portion including a plurality of slots configured to receive electrode leads of the plurality of pouch-type secondary batteries therethrough, and wherein the end portion of the first busbar frame projects from the planar portion of the first busbar frame in the first dimension towards the center of the support plate such that the first fence member located at the end of the end portion is spaced apart from the planar portion in the first dimension.

14. The battery module according to claim 1 , wherein the first fence member has a longitudinal dimension extending along the support plate in the stacking dimension.

Assignees

• Lg Energy Solution Ltd

Inventors

• Jin Hee-Jun
• Kim Kyung-Woo
• Kim Kyung-Mo
• Mun Jeong-O
• Park Jin-Yong
• Park Jhin-Ha
• Chi Ho-June

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M50/505

  comprising a single busbar · CPC title

• H01M10/6554 Primary

  Rods or plates · CPC title

• H01M10/647

  Prismatic or flat cells, e.g. pouch cells · CPC title

• H01M10/625

  Vehicles · CPC title