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11.发明公开公开(公告)号：US20230223538A1
公开(公告)日：2023-07-13
申请号：US18188686
申请日：2023-03-23
Applicant: Ningde Amperex Technology Limited
Inventor： Shuo WANG , Jiali DONG , Jia TANG , Yuansen XIE
IPC: H01M4/587 , H01M4/133 , H01M10/0525
CPC classification number: H01M4/587 , H01M4/133 , H01M10/0525 , H01M2004/027
Abstract: A negative active material having a surface mean diameter of the negative active material satisfying: lg(SMD−2)+lg(SMD+2)≥0.4. SMD is a value of the surface mean diameter of the negative active material measured in μm, and falls within a range of 10 to 16; and lg is a frequency. The negative active material enables the electrochemical device to achieve a trade-off between a high energy density and a low degree of lithium plating.
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公开(公告)号：US20230100932A1
公开(公告)日：2023-03-30
申请号：US18073884
申请日：2022-12-02
Applicant: Ningde Amperex Technology Limited
Inventor： Lihong HE , Jia TANG , Jiali DONG , Yuansen XIE
Abstract: A negative active material includes a carbon material. The carbon material satisfies the following relationship: 6
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13.发明申请公开(公告)号：US20230052908A1
公开(公告)日：2023-02-16
申请号：US17971811
申请日：2022-10-24
Applicant: Ningde Amperex Technology Limited
Inventor： Wenbo JIN , Jiali DONG , Lihong HE , Yuansen XIE
Abstract: A negative electrode active material includes a carbon material, where the carbon material has a specific degree of graphitization and aspect ratio distribution. A degree of graphitization Gr of the carbon material measured by an X-ray diffraction analysis method is 0.82 to 0.92, and based on a total quantity of particles of the carbon material, a proportion of particles with an aspect ratio greater than 3.3 in the carbon material is less than 10%. The negative electrode active material helps to improve cycle performance of the electrochemical apparatus. FIG. 1.
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14.发明申请公开(公告)号：US20230026799A1
公开(公告)日：2023-01-26
申请号：US17947751
申请日：2022-09-19
Applicant: Ningde Amperex Technology Limited
Inventor： Pengyang FENG , Yuxin CAI , Jiali DONG , Yuansen XIE
Abstract: An anode active material, and an electrochemical device and electronic device using such anode active material. Also, an anode active material, including graphite. Controlling a graphitization degree of particles of different particle sizes of the anode active material can achieve a balance between kinetic performance and first cycle efficiency of the electrochemical device.
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公开(公告)号：US20240243284A1
公开(公告)日：2024-07-18
申请号：US18621601
申请日：2024-03-29
Applicant: Ningde Amperex Technology Limited
Inventor： Jia TANG , Jiali DONG , Lihong HE , Yuansen XIE
IPC: H01M4/583 , H01M4/02 , H01M10/0567 , H01M10/0568 , H01M10/0569
CPC classification number: H01M4/583 , H01M10/0567 , H01M10/0568 , H01M10/0569 , H01M2004/021 , H01M2004/027 , H01M2300/0051
Abstract: A negative electrode material layer includes a negative electrode active material, the negative electrode active material includes graphite, and (d1/d2−1)×100%≤0.56% and 3.3600≤d1≤3.3720 are satisfied; where d1 Å is an interplanar spacing of (002) crystal plane of the negative electrode active material obtained by sintering the negative electrode material layer tested by an X-ray diffractometer, and d2 Å is an interplanar spacing of the (002) crystal plane of the negative electrode active material in the negative electrode material layer tested by the X-ray diffractometer. The negative electrode plate of the electrochemical apparatus provided in this application has low swelling rate during cycling, so that the electrochemical apparatus also has low swelling rate during cycling.
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Patent Agency Ranking
16.发明公开公开(公告)号：US20240120483A1
公开(公告)日：2024-04-11
申请号：US18374695
申请日：2023-09-29
Applicant: Ningde Amperex Technology Limited
Inventor： Yuxin CAI , Yusheng CHEN , Jiali DONG
CPC classification number: H01M4/587 , H01M4/133 , H01M2004/021
Abstract: A negative electrode active material includes graphite and amorphous carbon, where according to Raman testing, the negative electrode active material satisfies: 1.6≤WD/WG≤2.6, where WD is a peak width at half height of peak D within 1340 cm−1 to 1370 cm−1 in the Raman spectrum, 40 cm−1≤WD≤100 cm−1, and WG is a peak width at half height of peak G within 1570 cm−1 to 1590 cm−1, 15 cm−1≤WG≤50 cm−1. The negative electrode active material undergoes surface treatment, where the surface thereof has a higher surface lattice defect degree, effectively improving a gram capacity and kinetics performance thereof, thereby making the electrochemical apparatus including the negative electrode active material have both high energy density and good electrochemical performance.
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17.发明公开公开(公告)号：US20240030439A1
公开(公告)日：2024-01-25
申请号：US18374731
申请日：2023-09-29
Applicant: Ningde Amperex Technology Limited
Inventor： Wenbo JIN , Jiali DONG
CPC classification number: H01M4/587 , C01B32/20 , H01M4/133 , C01B2204/22 , C01P2004/03 , C01P2006/17 , C01P2006/10 , C01P2004/51 , C01B2204/32 , C01P2006/12 , C01P2006/40 , H01M2004/027
Abstract: A negative electrode material includes a carbonaceous active material. Observed in a 80 μm×100 μm region of an SEM image, the carbonaceous active material includes carbonaceous particles with pores. A proportion of a quantity of the carbonaceous particles with a quantity of the pores of N≤2 in a total quantity of the carbonaceous particles in the 80 μm×100 μm region is ≤60%, and a proportion of a quantity of the carbonaceous particles with a quantity of the pores of 3≤N≤5 in the total quantity of carbonaceous particles in the 80 μm×100 μm region is ≤30%.
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公开(公告)号：US20220115644A1
公开(公告)日：2022-04-14
申请号：US17265871
申请日：2020-01-02
Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED
Inventor： Jia TANG , Pengyang FENG , Jiali DONG , Yuansen XIE
IPC: H01M4/36 , H01M4/133 , H01M4/1393 , H01M4/525 , H01M4/62
Abstract: An anode including a current collector and an anode active material layer on the current collector are provided. The anode active material layer includes first oriented particles having a first tilt angle θ1 inclined with respect to the direction of the current collector, and second oriented particles having a second tilt angle θ2 inclined with respect to the direction of the current collector. The first tilt angle θ1 and the second tilt angle θ2 are different and both not greater than 70°.
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公开(公告)号：US20210351405A1
公开(公告)日：2021-11-11
申请号：US17281042
申请日：2020-03-11
Applicant: Ningde Amperex Technology Limited
Inventor： Pengyang FENG , Jiali DONG , Jia TANG , Yuansen XIE
Abstract: An anode material having 0.8≤0.06×(Dv50)2−2.5×Dv50+Dv99≤12 (1); and 1.2≤0.2×Dv50−0.006×(Dv50)2+BET≤5 (2), where Dv50 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 50% of the particles, Dv99 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 99% of the particles, and BET is a specific surface area of the anode material, wherein Dv50 and Dv99 are expressed in μm and BET is expressed in m2/g. The anode material is capable of significantly improving the rate performance of electrochemical devices.
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公开(公告)号：US20170297269A1
公开(公告)日：2017-10-19
申请号：US15299089
申请日：2016-10-20
Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED
Inventor： Yajie ZHANG , Ping HE , Liqing LIN , Jiali DONG
IPC: B29C65/52 , B29C65/48 , H01M2/08 , B33Y10/00 , H01M10/0525 , B33Y80/00 , H01M10/058 , B29K105/00 , B29K33/00 , B29L31/00
CPC classification number: B29C65/526 , B29C64/112 , B29C65/4805 , B29K2033/00 , B29K2105/0097 , B29L2031/7146 , B33Y10/00 , B33Y80/00 , H01M2/0434 , H01M2/08 , H01M10/0525 , H01M10/058
Abstract: This application relates to a method of edge sealing for a secondary lithium battery, including: (1) drawing a 3D model of a battery edge of a secondary lithium battery, and inputting it into a 3D printer; (2) positioning the secondary lithium battery in a 3D printing area, and fixing a relative position of the secondary lithium battery in the 3D printing area; (3) stimulating, by the 3D printer, the battery edge according to the 3D model and setting a printing path; (4) adding edge sealing glue in a printing head of the 3D printer, the printing head moves according to the set printing path and meantime performs at least one time of printing, so that printed edge sealing glue covers the battery edge; (5) solidifying the edge sealing glue. The method of edge sealing of this application has broader application, which can be applied to batteries of any shape.
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