US 11,870,103 B2
Electrode assembly having negative electrode disposed as outermost electrode, and lithium-ion secondary battery having same
Joo Seong Kim, Daejeon (KR); Jin Hong Ha, Daejeon (KR); and Gil Ju Lee, Daejeon (KR)
Assigned to LiBEST INC., Daejeon (KR)
Filed by LiBEST INC., Daejeon (KR)
Filed on May 20, 2020, as Appl. No. 16/878,941.
Application 16/878,941 is a continuation of application No. PCT/KR2018/014386, filed on Nov. 21, 2018.
Claims priority of application No. 10-2017-0155464 (KR), filed on Nov. 21, 2017; and application No. 10-2018-0144796 (KR), filed on Nov. 21, 2018.
Prior Publication US 2020/0280042 A1, Sep. 3, 2020
Int. Cl. H01M 50/54 (2021.01); H01M 50/536 (2021.01); H01M 50/534 (2021.01)
CPC H01M 50/54 (2021.01) [H01M 50/534 (2021.01); H01M 50/536 (2021.01)] 12 Claims
OG exemplary drawing
 
1. An electrode assembly, comprising:
a plurality of electrodes; and
one or more unit cells, each of the one or more unit cells including at least a pair of electrodes of the plurality of electrodes having different polarities with a separator interposed therebetween,
wherein at least one of an electrode parallel connection tab and an electrode lead connection tab is formed on each electrode of the plurality of electrodes, and
wherein a negative electrode of the pair of electrodes is an outermost electrode and includes first electrode parallel connection tab and a first electrode lead connection tab provided at a side opposite to the first electrode parallel connection tab and inside of the separator, and
wherein an area of a mixture layer of a positive electrode of the pair of electrodes including a second electrode parallel connection tab and a second electrode lead connection tab provided at a side opposite of the second electrode parallel connection tab and inside of the separator among the plurality of electrodes included in the electrode assembly is smaller than an area of a mixture layer of the negative electrode corresponding to the outermost electrode,
wherein the mixture layer of the negative electrode corresponding to the outermost electrode is provided between the first electrode parallel connection tab and the first electrode lead connection tab, and
wherein the mixture layer of the positive electrode is provided between the second electrode parallel connection tab and the second electrode lead connection tab.