公开(公告)号：US20240363910A1

公开(公告)日：2024-10-31

申请号：US18768551

申请日：2024-07-10

申请人： Ningde Amperex Technology Limited

发明人： Lilan ZHANG ,  Chao TANG

IPC分类号： H01M10/42 ,  H01M4/02 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568

CPC分类号： H01M10/4235 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/028 ,  H01M2300/0025

摘要： An electrochemical device includes a positive electrode and an electrolyte. The positive electrode includes a positive current collector and a positive electrode material layer disposed on at least one surface of the positive current collector. After the electrochemical device is charged and discharged for a first cycle, a number of pores in any one region of a 20 μm×20 μm size on the positive current collector is X, where X is an integer ranging from 0 to 10. The electrolyte includes a fluorine-containing sulfonyl imide salt and a fluorine-containing substance Y. Based on a mass of the electrolyte, a mass percent of the fluorine-containing sulfonyl imide salt is A %, and a mass percent of the fluorine-containing substance Y is B %. X, A, and B satisfy: 0≤AX/B≤450.

公开(公告)号：US12132170B2

公开(公告)日：2024-10-29

申请号：US16970295

申请日：2020-01-20

申请人： NINGDE AMPEREX TECHNOLOGY LIMITED

发明人： Junfei Liu ,  Shuirong Zhang ,  Juan Ma ,  Chao Tang

IPC分类号： H01M10/05 ,  H01M10/0525 ,  H01M10/0567

CPC分类号： H01M10/0567 ,  H01M10/0525 ,  H01M2300/004

摘要： The present application relates to an electrolyte and an electrochemical device including the same. The electrolyte includes a diboronic acid compound and a nitrile compound, so that the storage performance and cycle performance of the electrochemical device using the electrolyte can be remarkably improved.

公开(公告)号：US20240356164A1

公开(公告)日：2024-10-24

申请号：US18641905

申请日：2024-04-22

申请人： Ningde Amperex Technology Limited

发明人： Xiaoping LIN

IPC分类号： H01M50/491 ,  H01M50/411

CPC分类号： H01M50/491 ,  H01M50/411

摘要： A separator includes a polymer layer and a porous material layer. The porous material layer includes a porous material. The porous material includes a metal-organic framework material, a covalent organic framework material, a molecular sieve material, or a microporous polymer. The separator contains nanopores and sub-nanopores. By applying the separator to an electrochemical device, solvent molecules in an electrolyte solution can be confined within pore channels of the separator while the electrolyte solution penetrates the separator, thereby not only reducing side reactions between lithium metal and the electrolyte solution during cycling of the electrochemical device and improving the cycle performance of the electrochemical device, but also increasing the mobility of lithium ions and improving the electrochemical performance of the electrochemical device.

公开(公告)号：US20240356012A1

公开(公告)日：2024-10-24

申请号：US18758271

申请日：2024-06-28

申请人： Ningde Amperex Technology Limited

发明人： Bing JIANG ,  Feng ZHOU ,  Qingwen ZHANG

IPC分类号： H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/583 ,  H01M10/0525

CPC分类号： H01M4/366 ,  H01M4/0416 ,  H01M4/583 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

摘要： An electrochemical device includes a negative electrode. The negative electrode includes a negative current collector and a negative active material layer disposed on at least one surface of the negative current collector. In an infrared spectroscopy test, the negative active material layer exhibits at least a first peak and a second peak in a wavenumber range of 2500 cm−1 to 3200 cm−1. This indicates that the negative active material layer contains an additive, and the additive increases the production efficiency of the negative electrode, thereby increasing the production efficiency of the electrochemical device. In addition, the electrochemical device exhibits a high discharge capacity.

公开(公告)号：US12125983B2

公开(公告)日：2024-10-22

申请号：US17326191

申请日：2021-05-20

申请人： Ningde Amperex Technology Limited

发明人： Kefei Wang

IPC分类号： H01M10/0569 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/48

CPC分类号： H01M10/0569 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/48 ,  H01M2300/0025

摘要： An electrolyte includes a fluorinated cyclic carbonate, a multi-nitrilemulti-nitrile compound having an ether bond and a cyclic carbonate having a carbon-carbon double bond. Based on a total weight of the electrolyte, a weight percentage (Cf) of the fluorinated cyclic carbonate is greater than a weight percentage (Cn) of the multi-nitrilemulti-nitrile compound having an ether bond. The electrolyte can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or floating-charge performance.

公开(公告)号：US20240347786A1

公开(公告)日：2024-10-17

申请号：US18757902

申请日：2024-06-28

申请人： Ningde Amperex Technology Limited

发明人： Wenqiang CHENG ,  Kefei WANG

IPC分类号： H01M10/42 ,  H01M4/02 ,  H01M4/131 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0567

CPC分类号： H01M10/4235 ,  H01M4/131 ,  H01M4/623 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2004/028

摘要： An electrochemical apparatus, including a positive electrode. The positive electrode includes a positive current collector and a positive electrode mixture layer formed on at least one surface of the positive current collector. The positive electrode mixture layer satisfies a relation: F1/F2≥5, where a cohesive force of the positive electrode mixture layer at an initial test temperature of 25° C. is F1 N/m, and a cohesive force of the positive electrode mixture layer treated at 130° C. and then cooled to 25° C. is F2 N/m. The above design not only sufficiently improves safety performance of the electrochemical apparatus at high pressure and high temperature, but also effectively reduces the voltage drop.

公开(公告)号：US20240339730A1

公开(公告)日：2024-10-10

申请号：US18746092

申请日：2024-06-18

申请人： Ningde Amperex Technology Limited

发明人： Xiexue PENG ,  Jianming ZHENG ,  Chao TANG ,  Haiyang NAN

IPC分类号： H01M50/489 ,  H01M10/0525 ,  H01M10/0567 ,  H01M50/417 ,  H01M50/426 ,  H01M50/434 ,  H01M50/446 ,  H01M50/449 ,  H01M50/451 ,  H01M50/457 ,  H01M50/491

CPC分类号： H01M50/489 ,  H01M10/0525 ,  H01M10/0567 ,  H01M50/417 ,  H01M50/426 ,  H01M50/434 ,  H01M50/446 ,  H01M50/449 ,  H01M50/451 ,  H01M50/457 ,  H01M50/491 ,  H01M2300/0025

摘要： An electrochemical device includes a separator and an electrolyte. The separator includes a first porous layer and a second porous layer; and the electrolyte includes at least one compound containing 2 to 3 cyano groups; and a pore closing temperature of the first porous layer is different from a pore closing temperature of the second porous layer.

公开(公告)号：US20240332742A1

公开(公告)日：2024-10-03

申请号：US18621506

申请日：2024-03-29

申请人： Ningde Amperex Technology Limited

发明人： Kewen HU

IPC分类号： H01M50/486 ,  H01M10/0525 ,  H01M50/105

CPC分类号： H01M50/486 ,  H01M10/0525 ,  H01M50/105

摘要： A secondary battery includes an electrode assembly and an adhesive member, the adhesive member being adhered to the electrode assembly; the adhesive member includes a stacked substrate layer and a first adhesive layer, the first adhesive layer including a binder and a first resin; the first resin includes a styrene-ethylene-butene-styrene block copolymer and a butyl rubber; and based on mass of the first adhesive layer, the binder has a mass percentage of 65% to 95%, and the first resin has a mass percentage of 5% to 35%. In the secondary battery provided in this application, the first adhesive layer includes the above substances, and the percentages thereof are controlled within the scope of this application, so that the first adhesive layer has a high hardness, which facilitates removal of bubbles between the adhesive member and the electrode assembly.

公开(公告)号：US20240327682A1

公开(公告)日：2024-10-03

申请号：US18621272

申请日：2024-03-29

申请人： Ningde Amperex Technology Limited

发明人： Kewen HU

IPC分类号： C09J11/08 ,  C09J7/25 ,  C09J7/30 ,  C09J153/02 ,  H01M10/0525 ,  H01M10/058 ,  H01M10/42 ,  H01M50/105

CPC分类号： C09J11/08 ,  C09J7/255 ,  C09J7/30 ,  C09J153/02 ,  H01M10/0525 ,  H01M10/058 ,  H01M10/4235 ,  H01M50/105 ,  C09J2203/33 ,  C09J2453/00 ,  C09J2467/006

摘要： A secondary battery includes an electrode assembly, an electrolyte, a housing, and an adhesive member. The adhesive member includes a first adhesive layer and a second adhesive layer that are stacked. The adhesive member is disposed between the electrode assembly and the housing, where the first adhesive layer is attached to inner surface of the housing, and the second adhesive layer is attached to outer surface of the electrode assembly. The first adhesive layer includes a styrene-isoprene-styrene block copolymer and wax. Based on mass of the first adhesive layer, a mass percentage of the styrene-isoprene-styrene block copolymer is 65% to 95%, and a mass percentage of the wax is 1% to 5%. The adhesive member of the secondary battery in this application reduces occurrence of adhesive fall-off caused by friction, thereby improving safety performance of the secondary battery.

公开(公告)号：US12095299B2

公开(公告)日：2024-09-17

申请号：US17033835

申请日：2020-09-27

申请人： Ningde Amperex Technology Limited

发明人： Ting Guan ,  Shan Zhu ,  Fei Wu

IPC分类号： H02J7/00

CPC分类号： H02J7/0048 ,  H02J7/0071 ,  H02J7/00712 ,  H02J7/007182

摘要： A method for charging a battery includes charging the battery with a charging current at a constant current during an mth charge and discharge cycle; a first state of charge SOC1 of the battery when the constant current charging phase in any one charge and discharge cycle ends is the same as a standard state of charge SOC0, SOCb≤SOC0≤SOCa+k. SOCa is a state of charge or a preset value of the battery at the end of the constant current charging phase during an nth charge and discharge cycle, SOCb is a state of charge or a preset value of the battery at the end of the constant current charging phase during an (m−1)th charge and discharge cycle, SOCb≤SOC0≤SOCa+k, 0≤k≤10%, and SOCa+k≤100%.