Battery module

Patent metadata

Field	Value
Publication number	US-11967735-B2
Application number	US-201917053238-A
Country	US
Kind code	B2
Filing date	Dec 2, 2019
Priority date	Dec 6, 2018
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

A battery module includes: a battery cell stack in which a plurality of battery cells are stacked, each battery cell of the plurality of battery cells including a portion of a battery case body extended outward as a cell terrace, a busbar frame connected to the battery cell stack, electrode leads protruding from the cell terraces, respectively, of the plurality of battery cells, and a partition wall disposed between immediately adjacent electrode leads and formed on the busbar frame, the partition wall located between the cell terrace protruding from an outermost battery cell of the plurality of battery cells in the battery cell stack and the cell terrace protruding from the battery cell immediately adjacent to the outermost battery cell.

First claim

The invention claimed is:

1. A battery module comprising:
a battery cell stack in which a plurality of battery cells are stacked, each battery cell of the plurality of battery cells including a portion of a battery case body extended outward as a cell terrace,
a busbar frame connected to the battery cell stack,
electrode leads protruding from the cell terraces, respectively, of the plurality of battery cells, each electrode lead having a respective distal region extending away from the battery cell stack, and
a partition wall formed on the busbar frame, the partition wall being located between the cell terrace protruding from an outermost battery cell of the plurality of battery cells in the battery cell stack and the cell terrace protruding from an inner battery cell immediately adjacent to the outermost battery cell, the partition wall being disposed between immediately adjacent ones of the electrode leads coupled to the respective outermost and inner battery cells, the distal regions of the immediately adjacent ones of the electrode leads being physically coupled with one another.

2. The battery module of claim 1 ,
wherein the partition wall has a bent structure.

3. The battery module of claim 1 ,
wherein a plurality of path guiders is formed on the busbar frame, and the partition wall is disposed between two path guiders of the plurality of path guiders located at an outermost part of the busbar frame.

4. The battery module of claim 1 ,
wherein each electrode lead is inserted into a lead slot formed on the busbar frame, and the electrode lead protruding from the cell terrace of the outermost battery cell and an end of the cell terrace protruding from the battery cell immediately adjacent to the outermost battery cell are separated by the partition wall.

5. The battery module of claim 1 ,
further comprising a plurality of additional partition walls disposed one by one between path guiders immediately adjacent to each other among a plurality of path guiders formed on the busbar frame.

6. The battery module of claim 5 ,
wherein among the battery cells included in the battery cell stack, a bent angle of each partition wall of the plurality of partition walls gradually decreases from the outermost battery cell to a central battery cell of the plurality of battery cells.

7. The battery module of claim 1 ,
wherein both a polarity of the electrode lead protruding from the cell terrace protruding from the outermost battery cell and a polarity of the electrode lead protruding from the cell terrace protruding from the battery cell immediately adjacent to the outermost battery cell are negative.

8. The battery module of claim 7 ,
wherein an interval between the cell terrace protruding from the outermost battery cell and the cell terrace protruding from the battery cell immediately adjacent to the outermost battery cell becomes gradually narrower along a direction in which the electrode leads protrude.

9. The battery module of claim 8 ,
wherein a bent structure of the outermost partition wall is folded toward the electrode lead coupled to the inner battery cell.

10. The battery module of claim 1 ,
wherein the electrode leads immediately adjacent to each other with the partition wall being interposed therebetween pass through a lead slot formed on the busbar frame and meet and connect at a rear surface of the busbar frame.

11. The battery module of claim 1 ,
wherein the cell terrace protruding from the outermost battery cell is bent more than the cell terrace protruding from the battery cell immediately adjacent to the outermost battery cell.

12. The battery module of claim 1 ,
wherein each electrode lead is inserted into a lead slot formed on the busbar frame, and an end of any one of the cell terraces and the electrode lead connected to an end of the immediately adjacent cell terrace are separated by the partition wall.

13. The battery module of claim 1 ,
wherein an interval between the cell terraces in which the electrode leads having the same polarity as each other protrude among the cell terraces becomes narrower along a direction in which the electrode leads protrude.

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

15. A device comprising the battery pack according to claim 14 .

16. The battery module of claim 1 ,
wherein the partition wall is disposed so as to prevent each of the immediately adjacent ones of the electrode leads from contacting the cell terrace from which the other of the immediately adjacent ones of the electrode leads protrudes.

17. A battery module comprising:
a battery cell stack in which a plurality of battery cells are stacked, each battery cell of the plurality of battery cells including a portion of a battery case body extended outward as a cell terrace;
a busbar frame connected to the battery cell stack;
electrode leads protruding from the cell terraces, respectively, of the plurality of battery cells;
a partition wall disposed between immediately adjacent electrode leads and formed on the busbar frame, the partition wall located between the cell terrace protruding from an outermost battery cell of the plurality of battery cells in the battery cell stack and the cell terrace protruding from the battery cell immediately adjacent to the outermost battery cell; and
a plurality of additional partition walls being disposed one by one between path guiders immediately adjacent to each other among a plurality of path guiders formed on the busbar frame,
wherein among the battery cells included in the battery cell stack, a bent angle of each partition wall of the plurality of partition walls gradually decreases from the outermost battery cell to a central battery cell of the plurality of battery cells.

Assignees

• Lg Chemical Ltd
• Lg Energy Solution Ltd

Inventors

• Kim Hyejin
• Yoon Doohan
• Yang Jaehun
• Seong Junyeob
• Choi Jong Woon
• Park Junkyu
• Choi Youngho

Classifications

• H01M50/505 Primary

  comprising a single busbar · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/289

  characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) · CPC title