公开(公告)号：US20240356077A1

公开(公告)日：2024-10-24

申请号：US18758096

申请日：2024-06-28

申请人： Dongguan Amperex Technology Limited

发明人： Chunrui XU ,  Yanyan XU ,  Chao TANG

IPC分类号： H01M10/0567 ,  H01M4/02 ,  H01M4/38 ,  H01M10/0525

CPC分类号： H01M10/0567 ,  H01M4/38 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

摘要： An electrochemical device includes: a negative electrode; a positive electrode, where the positive electrode includes a current collector and a positive electrode active material layer provided on the current collector, the positive electrode active material layer includes a positive electrode active material, and the positive electrode has an active specific surface area of X m2/g; and an electrolyte, where the electrolyte contains an additive A, the additive A contains LiPO2F2, and a weight percentage of the LiPO2F2 is Y % based on a weight of the electrolyte, where 0.005≤X/Y≤2 is satisfied. The electrochemical device has higher cycling performance, storage performance, and overcharge performance, as well as lower impedance.

公开(公告)号：US20240347727A1

公开(公告)日：2024-10-17

申请号：US18672400

申请日：2024-05-23

申请人： Dongguan Amperex Technology Limited

发明人： Chenchen LI ,  Ping HE ,  Daolin LIU ,  Jun CHEN

IPC分类号： H01M4/583 ,  H01M4/02 ,  H01M4/04 ,  H01M50/48

CPC分类号： H01M4/583 ,  H01M4/0404 ,  H01M50/48 ,  H01M2004/021 ,  H01M2004/027

摘要： An electrochemical apparatus, including: a first electrode assembly including a first negative electrode plate having a first negative current collector with a first negative active material layer disposed on at least one surface; and a second electrode assembly including a second negative electrode plate having a second negative current collector with a second negative active material layer disposed on at least one surface. A coating weight W1f of the first negative active material layer and a coating weight W2f of the second negative active material layer satisfy: 30 mg/1540.25 mm2≤W2f−W1f≤100 mg/1540.25 mm2. By regulating a value of W2f−W1f to be within the above range, energy density of the electrochemical apparatus and swelling performance of the electrochemical apparatus can be improved while fast charging performance is satisfied.

公开(公告)号：US20240266698A1

公开(公告)日：2024-08-08

申请号：US18622555

申请日：2024-03-29

申请人： DONGGUAN AMPEREX TECHNOLOGY LIMITED

发明人： Yuyang DONG ,  Dongyang Yan ,  Qiao Zeng

IPC分类号： H01M50/586 ,  H01M10/04 ,  H01M50/595

CPC分类号： H01M50/586 ,  H01M10/0431 ,  H01M50/595

摘要： A battery includes a housing, an electrode assembly, a first layer and a second layer. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator. The electrode assembly is wound. The first electrode plate includes a first edge and a second edge disposed opposite to each other along a winding direction and includes a first ending end towards the second edge. Viewed along a first direction, the electrode assembly includes a first surface. The second edge divides the first surface into a first region and a second region. The first region is a region containing the first ending end. The first layer is fixed to the first region and the second region. The second layer is fixed to the first surface and at a distance from the first layer, and the second layer bonds and fixes the electrode assembly to the housing.

公开(公告)号：US20240234730A1

公开(公告)日：2024-07-11

申请号：US18615002

申请日：2024-03-25

申请人： Dongguan Amperex Technology Limited

发明人： Dou YING

IPC分类号： H01M4/60 ,  H01M4/131 ,  H01M4/50

CPC分类号： H01M4/602 ,  H01M4/131 ,  H01M4/50

摘要： An electrochemical device includes an electrode plate. The electrode plate includes a current collector, a conductive layer, and an active material layer. The conductive layer is disposed between the current collector and the active material layer. The electrochemical device satisfies the following relation: 0.7

公开(公告)号：US20240204305A1

公开(公告)日：2024-06-20

申请号：US18539288

申请日：2023-12-14

申请人： Dongguan Amperex Technology Limited

发明人： Chenchen LI

IPC分类号： H01M50/102 ,  H01M50/119 ,  H01M50/133

CPC分类号： H01M50/102 ,  H01M50/119 ,  H01M50/133

摘要： A secondary battery includes an electrode assembly, a housing, and an adhesion layer. The housing includes an upper housing body and a lower housing body. The lower housing body is provided with a recess for accommodating the electrode assembly. The upper housing body is configured to cover the recess. The adhesion layer is provided on a bottom surface of the recess opposite to the upper housing body. The housing is a metal housing. The adhesion layer adheres the electrode assembly to the housing.

公开(公告)号：US20240204232A1

公开(公告)日：2024-06-20

申请号：US18544744

申请日：2023-12-19

申请人： Dongguan Amperex Technology Limited

发明人： Jianpeng CHEN

IPC分类号： H01M10/04 ,  H01M4/66 ,  H01M50/105

CPC分类号： H01M10/0413 ,  H01M4/661 ,  H01M4/668 ,  H01M50/105 ,  H01M2220/20 ,  H01M2220/30

摘要： A battery cell includes a positive electrode plate, a separator and a negative electrode plate which are stacked. The positive electrode plate includes a first positive electrode, at least one second positive electrode, a first positive electrode tab and a second positive electrode tab. The first positive electrode plate includes a first positive electrode current collector and a positive electrode active material layer provided thereon. The first positive electrode current collector includes a polymer layer and a conductive layer provided thereon. The second positive electrode plate includes a second positive electrode current collector and a positive electrode active material layer provided thereon. The second positive electrode current collector is made of a metal material. The first positive electrode tab extends outwards from an edge of the first positive electrode plate. The second positive electrode tab extends outwards from an edge of the second positive electrode plate.

公开(公告)号：US11984579B2

公开(公告)日：2024-05-14

申请号：US17187629

申请日：2021-02-26

申请人： NINGDE AMPEREX TECHNOLOGY LIMITED ,  DONGGUAN AMPEREX TECHNLOGY LIMITED

发明人： Wenyuan Liu ,  Gang Peng ,  Ye Lang

IPC分类号： H01M4/505 ,  H01M4/04 ,  H01M4/525 ,  H01M4/02

CPC分类号： H01M4/0471 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/021 ,  H01M2004/028

摘要： A positive electrode material includes secondary particles formed from primary particles. The positive electrode material satisfies the following relational expression: 15%≤(Dv50a−Dv50b)/Dv50b≤80%, where Dv50a represents Dv50 directly measured by a laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv50b represents Dv50 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, and Dv50 represents a particle size of the positive electrode material at a cumulative volume of 50% in a volume-based particle size distribution as measured by starting from small particle sizes. The secondary particles of the positive electrode material that meets the foregoing condition can form soft agglomerates, so that the electrochemical device is of high cycle performance and high safety performance.

公开(公告)号：US20230238626A1

公开(公告)日：2023-07-27

申请号：US18192957

申请日：2023-03-30

申请人： Dongguan Amperex Technology Limited

发明人： Wenjie DAI ,  Xinhui ZHOU

IPC分类号： H01M50/186 ,  H01M50/121 ,  H01M50/193 ,  H01M50/538 ,  H01M50/124 ,  H01M50/105

CPC分类号： H01M50/186 ,  H01M50/105 ,  H01M50/121 ,  H01M50/124 ,  H01M50/193 ,  H01M50/538

摘要： An electrochemical device includes a housing including a body portion and a first portion, an electrode assembly, and a tab. In a second direction, the body portion includes a first wall and a second wall disposed opposite to each other. In a third direction, the body portion includes a first sidewall and a second sidewall disposed opposite to each other. The first portion includes a first seal edge and a second seal edge. The first seal edge is connected to the first sidewall and the second wall. The second seal edge is connected to the first seal edge. The second seal edge is disposed between the first seal edge and the first sidewall. The housing includes a first housing part and a second housing part disposed opposite to each other. The first housing part includes a first polymer layer. The second housing part includes a second polymer layer.

公开(公告)号：US20230216034A1

公开(公告)日：2023-07-06

申请号：US18090667

申请日：2022-12-29

申请人： Dongguan Amperex Technology Limited

发明人： Shengzeng Lin

IPC分类号： H01M4/36 ,  H01M4/62 ,  H01M4/60

CPC分类号： H01M4/366 ,  H01M4/622 ,  H01M4/602 ,  H01M2004/028

摘要： An electrochemical apparatus formed by stacking and then winding a first separator, a negative electrode plate, a second separator, and a positive electrode plate. The negative electrode plate includes a negative electrode current collector, a first active material layer and a second active material layer. In a winding direction, a length of the first active material layer is greater than a length of the second active material layer. The first separator comprises a first substrate layer, a first coating layer and a second coating layer. The second separator comprises a second substrate layer, a third coating layer and a fourth coating layer. A bonding force between a first active material layer and a second coating layer is less than a bonding force between a second active material layer and a fourth coating layer.

公开(公告)号：US20230187695A1

公开(公告)日：2023-06-15

申请号：US17281167

申请日：2020-05-22

申请人： Ningde Amperex Technology Limited ,  DONGGUAN AMPEREX TECHNOLOGY LIMITED

发明人： Xiexue Peng ,  Jianming Zheng ,  Wenqiang Li ,  Hui Chen

IPC分类号： H01M10/0567 ,  H01M4/04 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/417 ,  H01M50/449

CPC分类号： H01M10/0567 ,  H01M4/0404 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/417 ,  H01M50/449 ,  H01M2300/0051

摘要： An electrolyte including a compound





R11 is a covalent bond, a substituted or unsubstituted C1-C20 alkylidene group, a substituted or unsubstituted C2-C20 alkenylene group, a substituted or unsubstituted C2-C20 alkynylene group, a substituted or unsubstituted C6-C20 arylene group, a substituted or unsubstituted C3-C20 heteroarylene group, a substituted or unsubstituted C3-C20 cycloalkylene group,





or a combination thereof. R12, R13, and R14 are a substituted or unsubstituted C1-C20 alkylidene group, C2-C20 alkenylene group, C2-C20 alkynylene group, C6-C20 arylene group, C3-C20 heteroarylene group, or C3-C20 cycloalkylene group;





or a combination thereof. R15 and R16 are a C1-C20 alkylidene group, a substituted or unsubstituted C2-C20 alkenylene group, a substituted or unsubstituted C2-C20 alkynylene group, a substituted or unsubstituted C6-C20 arylene group, a substituted or unsubstituted C3-C20 heteroarylene group, or a substituted or unsubstituted C3-C20 cycloalkylene group.