US 12,261,325 B2
Battery module having structure capable of preventing battery cell damage, and battery pack and vehicle comprising battery module
Won-Kyoung Park, Daejeon (KR); Jun-Yeob Seong, Daejeon (KR); Jung-Min Kwak, Daejeon (KR); and Jun-Kyu Park, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 16/964,540
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Oct. 24, 2019, PCT No. PCT/KR2019/014065
§ 371(c)(1), (2) Date Jul. 23, 2020,
PCT Pub. No. WO2020/085815, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10-2018-0129071 (KR), filed on Oct. 26, 2018.
Prior Publication US 2021/0036295 A1, Feb. 4, 2021
Int. Cl. H01M 50/502 (2021.01); H01M 50/178 (2021.01); H01M 50/211 (2021.01); H01M 50/50 (2021.01); H01M 50/553 (2021.01)
CPC H01M 50/502 (2021.01) [H01M 50/178 (2021.01); H01M 50/211 (2021.01); H01M 50/50 (2021.01); H01M 50/553 (2021.01); H01M 2220/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A battery module comprising:
a cell stack structure in which a plurality of battery cells including a first battery cell and a second battery cell neighboring each other are stacked, each of the battery cells including a pouch case, an electrode lead, a lead film on the electrode lead and a terrace portion formed by a sealing portion of the pouch case; and
a bus bar frame assembly combined to at least one side of the cell stack structure and comprising a plurality of lead drawing holes from which the electrode leads are drawn out,
wherein a first electrode lead of a first polarity included in the first battery cell and a second electrode lead of the first polarity included in the second battery cell are externally drawn out through a same lead drawing hole,
wherein the first electrode lead and the second electrode lead are bent in a same direction and each electrode lead comprises a first bent portion formed on the terrace portion and a second bent portion formed outwardly of the terrace portion in a region where the lead film is formed,
wherein each electrode lead has a first section between a proximal end of the electrode lead and the first bent portion, a second section between the first bent portion and second bent portion and a third section after the second bent portion,
wherein the second section is straight,
wherein a first bending direction in the first bent portion and a second bending direction in the second bent portion are opposite directions,
wherein the first bending direction of the first battery cell is a direction approaching the second battery cell and the second bending direction of the first battery cell is a direction receding from the second battery cell,
wherein the first bending direction of the second battery cell is a direction receding from the first battery cell and the second bending direction of the second battery cell is a direction approaching the first battery cell,
wherein the second bent portion of the first battery cell is formed at a location corresponding to the terrace portion of the second battery cell, and
wherein the first bent portion of the second battery cell is formed at a location corresponding to the region where the lead film of the first battery cell is formed.