公开(公告)号：US11901555B2

公开(公告)日：2024-02-13

申请号：US18149672

申请日：2023-01-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Quanguo Li ,  Yonghuang Ye ,  Chengdu Liang ,  Haizu Jin ,  Qian Liu ,  Fajun Huang ,  Xiaofu Xu

IPC: H01M4/525 ,  H01M10/615 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/654 ,  H01M50/204 ,  H01M50/233 ,  H01M50/267 ,  H01M10/617

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/615 ,  H01M10/617 ,  H01M10/654 ,  H01M50/204 ,  H01M50/233 ,  H01M50/267

Abstract: A battery module, a battery pack, and an electric apparatus are provided. In some embodiments, the battery module includes a first type of cell and a second type of cell that are cells of different chemical systems, where the first type of cell includes n first cells, the second type of cell includes m second cells, n and m each are selected from an integer greater than 1, at least one of the first cells and at least one of the second cells are electrically connected in series, and the first cell and the second cell satisfy at least the following relationships: 0.08≤ΔRB/ΔRA≤3.50, and 0.10 mΩ/100 cycles≤ΔRA≤0.40 mΩ/100 cycles, where ΔRA is a discharge resistance growth rate of the first cell, and ΔRB is a discharge resistance growth rate of the second cell; and IMPB

公开(公告)号：US20240047813A1

公开(公告)日：2024-02-08

申请号：US18489834

申请日：2023-10-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianfu He ,  Qian Liu ,  Yonghuang Ye ,  Quanguo Li ,  Xiaofu Xu ,  Haizu Jin

IPC: H01M50/267 ,  H01M50/213 ,  H01M10/643 ,  H01M50/14

CPC classification number: H01M50/267 ,  H01M50/213 ,  H01M10/643 ,  H01M50/14 ,  H01M2220/20 ,  H01M10/625

Abstract: Provided are a battery pack and an electric apparatus. The battery pack of this application includes multiple battery cells arranged repeatedly in a unit structure, where the unit structure includes N1 first battery cells and N2 second battery cells, the N1 first battery cells surrounding the N2 second battery cells, N1 and N2 being integers greater than or equal to 1, and N1>N2. Given that the first battery cell has a volumetric energy density denoted as D1 and a direct current impedance denoted as R1, and that the second battery cell has a volumetric energy density denoted as D2 and a direct current impedance denoted as R2, the unit structure has a thermal stability factor μ=(D1×R1)/(D2×R2) satisfying 0.2≤μ≤1.

公开(公告)号：US11855297B2

公开(公告)日：2023-12-26

申请号：US18357389

申请日：2023-07-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianfu He ,  Yonghuang Ye ,  Qian Liu ,  Jingxuan Sun ,  Xiaofu Xu ,  Xueyang Sun ,  Haizu Jin

IPC: H01M50/242

CPC classification number: H01M50/242 ,  H01M2220/20

Abstract: This application discloses a battery unit. The battery unit includes a housing, at least one cell, and a buffer. The at least one cell is accommodated in the housing, the buffer is disposed corresponding to a side wall of the cell, and the buffer is provided with an accommodating cavity. A periphery of the accommodating cavity includes at least one packaging structure, the packaging structure includes at least one level of packaging region with a predetermined length. When pressure in the accommodating cavity exceeds packaging strength of the packaging structure, the packaging region is opened to form a buffer space that communicates with the accommodating cavity, reducing influence caused by swelling of the cell.

公开(公告)号：US20230261175A1

公开(公告)日：2023-08-17

申请号：US18180831

申请日：2023-03-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaofu Xu ,  Jianfu Pan ,  Xinyu Zhang ,  Yonghuang Ye ,  Jingxuan Sun ,  Qian Liu

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/58 ,  H01M4/525

CPC classification number: H01M4/364 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode active material comprising an A material and a B material, wherein the A material is at least one selected from the following single crystal materials or single crystal-like materials: LixMy(PO4)z, wherein M is selected from one or more of Ni, Co, Mn, Fe, Mg, Al, V, Zn, Zr, and F, v is the valence of M, 1≤x≤3, 1≤z≤3, and x+vy-3z=0; the A material has a Dv50 of 0.8 µm to 4.2 µm; the B material is selected from at least one of the following materials: (i) LiAO2, wherein A is Ni, Co or Mn; or (ii) LiNiaCobE1-a-bO2, wherein E is selected from at least one of Mn and Al, 0.50≤a≤0.98, and 0.001≤b≤0.3; wherein based on the total weight of the positive electrode active material, the A material is present in a mixing ratio m of 50 wt% to 97 wt%.

公开(公告)号：US20220393292A1

公开(公告)日：2022-12-08

申请号：US17889422

申请日：2022-08-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qian LIU ,  Chengdu Liang ,  Xiaofu Xu ,  Quanguo Li ,  Yonghuang Ye ,  Haizu Jin

IPC: H01M50/267 ,  H01M50/204 ,  H01M50/51 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505

Abstract: The present application relates to a battery module, comprising a first type of battery cells and a second type of battery cells electrically connected at least in series, wherein the first and second type of battery cells are battery cells of different chemical systems, the first type of battery cells comprises N first battery cells, the second type of battery cells comprises M second battery cells, and N and M are positive integers; a positive electrode plate of the second battery cell contains two or more positive electrode active materials, and when a dynamic SOC of the second battery cell is in a range from 90% to 98%, a change rate ΔOCV/ΔSOC in an OCV relative to the SOC of the second battery cell satisfies 3≤ΔOCV/ΔSOC≤9, in mV/% SOC, where SOC represents a charge state and OCV represents an open circuit voltage.