公开(公告)号：US20230231390A1

公开(公告)日：2023-07-20

申请号：US18125143

申请日：2023-03-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaofu XU ,  Yonghuang YE ,  Xinyu ZHANG ,  Jianfu PAN ,  Qian LIU ,  Quanguo LI

IPC: H02J7/00 ,  H01M4/525 ,  H01M10/44 ,  H01M50/51 ,  H01M4/131

CPC classification number: H02J7/0016 ,  H01M4/525 ,  H01M10/446 ,  H01M50/51 ,  H01M4/131 ,  H02J7/0048

Abstract: A battery unit may comprise a first cell type and a second cell type electrically connected at least in series, wherein the first cell type may include N first cells, the second cell type may include M second cells, and N and M are positive integers; the first cell may have a discharge cell balance rate of CB1, the second cell may have a discharge cell balance rate of CB2, with 0.5≤CB1≤CB2≤1.4, and when the battery unit is charged to 95%-100% of the state of charge, the first cell may have a corresponding open-circuit voltage change rate of not greater than 0.005 V/% SOC, and the second cell type may have a corresponding open-circuit voltage change rate greater than that of the first cell.

公开(公告)号：US20240204172A1

公开(公告)日：2024-06-20

申请号：US18590277

申请日：2024-02-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianfu PAN ,  Xiaofu XU ,  Xinyu ZHANG ,  Yibo SHANG ,  Qian LIU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/131 ,  H01M4/136 ,  H01M4/525 ,  H01M4/58 ,  H01M4/62

CPC classification number: H01M4/364 ,  H01M4/131 ,  H01M4/136 ,  H01M4/366 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/624 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode active material includes a low-to-medium nickel ternary material and a high-lattice-volume-change positive electrode material. The low-to-medium nickel ternary material has a mass ratio W1≥45% in the positive electrode active material. The high-lattice-volume-change positive electrode material satisfies: the thickness change rate of the positive electrode active substance layer is ≥2.6%, and the thickness change rate is (H1−H2)/H1, where H1 is the fully discharged thickness of the positive electrode active substance layer, and H2 is the fully charged thickness of the positive electrode active substance layer.