公开(公告)号：US20230282827A1

公开(公告)日：2023-09-07

申请号：US18315441

申请日：2023-05-10

Applicant: BYD COMPANY LIMITED

Inventor： NA CHEN ,  RONG HAO ,  YI PAN

IPC: H01M4/583 ,  H01M10/0525 ,  H01M4/525 ,  H01M50/434 ,  H01M50/489 ,  H01M50/451 ,  H01M50/414

CPC classification number: H01M4/583 ,  H01M10/0525 ,  H01M4/525 ,  H01M50/434 ,  H01M50/489 ,  H01M50/451 ,  H01M50/414 ,  H01M2004/028

Abstract: Provided is a lithium-ion battery, including a positive electrode plate, a separator, and a negative electrode plate. The separator is arranged between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode active layer laminated in sequence. A positive electrode active material in the positive electrode active layer includes lithium manganese iron phosphate and a ternary material. The negative electrode plate includes a negative electrode current collector and a negative electrode active layer laminated in sequence. The negative electrode active layer includes a composite layer and a lithium replenishing layer. A negative electrode active material in the composite layer includes a carbon material and SiOx. An areal density of lithium in the lithium replenishing layer is m2=a*M1*m1*δ*(1−η)/M2.