公开(公告)号：US20240291037A1

公开(公告)日：2024-08-29

申请号：US18621839

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Yezhen ZHENG ,  Shaoyun ZHOU

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2300/0025

Abstract: A lithium-ion battery includes an electrolytic solution and a negative electrode plate. The electrolytic solution includes vinylene carbonate and fluoroethylene carbonate. The negative electrode plate includes a negative active material. An OI value of the negative active material is a. Based on a weight of the electrolytic solution, a weight percent of the vinylene carbonate is b %, and a weight percent of the fluoroethylene carbonate is c %; and a, b, and c satisfy: 0.3≤a/(b+c)≤6; 0.02≤b+c≤10; and 0.1

公开(公告)号：US20240356076A1

公开(公告)日：2024-10-24

申请号：US18756240

申请日：2024-06-27

Applicant: Ningde Amperex Technology Limited

Inventor： Yezhen ZHENG ,  Shaoyun ZHOU

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/525 ,  H01M10/0568

CPC classification number: H01M10/0567 ,  H01M4/525 ,  H01M10/0568 ,  H01M2004/021 ,  H01M2004/028

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte solution. The electrolyte solution includes an additive. An electrolyte retention coefficient of the electrochemical device is a g/Ah, satisfying: 0.5≤a ≤3.5. Based on a total mass of the electrolyte solution, a mass percentage of the additive is b %, satisfying: 0.005≤b>3. The additive includes at least one of lithium bis(oxalato)borate, vinyl ethylene carbonate, methylene methane disulfonate, triallyl phosphate, trifluoromethyl ethylene carbonate, or prop-1-ene-1,3-sultone. In the electrochemical device of this application, an appropriate electrolyte retention amount is maintained, and the foregoing additive is added in the electrolyte solution in an appropriate amount, thereby effectively improving the low-temperature discharge performance and safety performance of the electrochemical device. The electronic device containing the electrochemical device also exhibits good low-temperature discharge performance and safety performance.

公开(公告)号：US20240332618A1

公开(公告)日：2024-10-03

申请号：US18619188

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Hui CUI ,  Yezhen ZHENG ,  Wenqiang LI

IPC: H01M10/0567 ,  C07C43/04 ,  C07C69/14 ,  C07C69/24 ,  C07C69/96 ,  C07D327/04 ,  H01G11/28 ,  H01G11/64 ,  H01M4/02 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  C07C43/04 ,  C07C43/046 ,  C07C69/14 ,  C07C69/24 ,  C07C69/96 ,  C07D327/04 ,  H01G11/28 ,  H01G11/64 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2300/0025

Abstract: An electrochemical device includes a negative electrode and an electrolyte solution. The negative electrode includes a negative current collector and a negative electrode mixture layer. The negative electrode mixture layer includes a first section, a second section, and a third section arranged sequentially in a thickness direction. The first section, the second section, and the third section are of an identical thickness. A ratio of a porosity P1 of the first section to a porosity P2 of the third section is P. The electrolyte solution includes an additive A, which is at least one selected from a compound of Formula I or a compound of Formula II:




Based on a total mass of the electrolyte solution, a mass percent of the additive A is w %, satisfying 1≤w≤60, P=P1/P2, and P/(w %+1)≥50%.