公开(公告)号：US20220393291A1

公开(公告)日：2022-12-08

申请号：US17887644

申请日：2022-08-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaofu XU ,  Yonghuang YE ,  Qian LIU ,  Haizu JIN ,  Chengdu LIANG

IPC: H01M50/267 ,  H01M50/209 ,  H01M50/51 ,  H01M4/583 ,  H01M10/04

Abstract: The present application relates to a battery module, including a first-type battery cell and a second-type battery cell electrically connected at least in series, the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, the first-type battery cell includes N first battery cell(s), the second-type battery cell includes M second battery cell(s); the first battery cell includes a first negative electrode plate, the second battery cell includes a second negative electrode plate, a ratio of a conductivity of an electrolyte solution (25° C.) of the first battery cell to a coating mass per unit area of the first negative electrode plate is denoted as Ml, and a ratio of a conductivity of an electrolyte solution (25° C.) of the second battery cell to a coating mass per unit area of the second negative electrode plate is denoted as M2, M1>M2, and 0.08≤M1≤11, 0.03≤M2≤4.62.

公开(公告)号：US20220255114A1

公开(公告)日：2022-08-11

申请号：US17732571

申请日：2022-04-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haizu JIN ,  Xiaowen ZHANG ,  Zhenhua LI

IPC: H01M10/04 ,  H01M4/525 ,  H01M10/0565

Abstract: This application relates to a battery comprising a positive electrode plate, a separator, and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and at least two layers of positive active material coated on at least one surface of the positive electrode current collector, and wherein an underlying positive active material layer in contact with the positive electrode current collector comprises a first positive active material, a first polymer material and a first conductive material; and wherein an upper positive active material layer in contact with the underlying positive active material layer and away from the positive electrode current collector comprises a second positive active material, a second polymer material and a second conductive material, and the first polymer material comprises fluorinated polyolefin and/or chlorinated polyolefin polymer material. The battery has good safety and improved electrical properties.

公开(公告)号：US20220221519A1

公开(公告)日：2022-07-14

申请号：US17705524

申请日：2022-03-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Dongyang SHI ,  Sitong LIU ,  Haizu JIN ,  Baiqing LI

IPC: G01R31/36 ,  G01R31/392 ,  H01M10/44 ,  G01R31/378

Abstract: Provided are a battery charging method and device, and a storage medium that are applicable to a lithium-ion battery with an N/P range of 0.5 to 1.1. The method includes: obtaining, by a power management system, a state of health (SOH) loss of the lithium-ion battery; and determining a charge cut-off voltage of a next charge process based on the SOH loss, an initial charge cut-off voltage of the lithium-ion battery, and a voltage correction factor, where the initial charge cut-off voltage is determined based on the N/P, and the charge cut-off voltage increases with increase of a count of charging. The N/P range is 0.5 to 1.1, thereby reducing the dosage of the negative electrode and reducing cost. In addition, the charge cut-off voltage of the next charge process is increased based on the SOH loss, thereby ensuring that the lithium-ion battery is free from lithium plating.

公开(公告)号：US20210376428A1

公开(公告)日：2021-12-02

申请号：US17130717

申请日：2020-12-22

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Haizu JIN ,  Hu XU ,  Yuqun ZENG

IPC: H01M50/538 ,  H01M10/0587 ,  H01M50/54 ,  H01M10/0525

Abstract: An electrode assembly as provided includes a plurality of first electrode plates and at least one second electrode plate. The plurality of first electrode plates and the at least one second electrode plate are wound around a winding axis to form a winding structure. In the winding structure, the plurality of first electrode plates and the second electrode plate are arranged in a superimposing manner along a direction vertical to the winding axis. Each first electrode plate includes a first current collector and a first active substance layer, and the first current collector includes a first main body portion and a first tab which protrudes from the first main body portion along the direction of the winding axis; wherein each first tab and the first main body portion are arranged in parallel along the winding axis.

公开(公告)号：US20210328304A1

公开(公告)日：2021-10-21

申请号：US17360307

申请日：2021-06-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Kaijie YOU ,  Peng WANG ,  Haizu JIN ,  Dongyang SHI ,  Zhenhua LI ,  Ning CHEN ,  Fei HU

IPC: H01M50/383 ,  H01M50/342 ,  H01M50/209

Abstract: The disclosure provides a battery pack, which includes a plurality of batteries and a box, the plurality of batteries accommodated in the box; each battery including an explosion-proof valve; the box including a lower box for supporting the batteries and an upper box matching the lower box, wherein the upper box includes an upper plate and a lower plate, the upper plate covers the lower plate to form an accommodating space for accommodating a fire extinguishing agent; the explosion-proof valve of each battery faces the lower plate of the upper box, and the lower plate is set to be able to discharge the fire extinguishing agent from the accommodating space after being melted. When the battery occurs a thermal runaway, the fire extinguishing agent in the lower plate flows rapidly to the runaway area, thus inhibiting the thermal runaway of the battery.

公开(公告)号：US20210313635A1

公开(公告)日：2021-10-07

申请号：US17162345

申请日：2021-01-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yongguang WANG ,  Mingdi XIE ,  Zhanyu SUN ,  Haizu JIN ,  Peng WANG ,  Kaijie YOU

IPC: H01M10/6554 ,  H01M50/207 ,  H01M50/166

Abstract: A battery module assembly, a battery pack, and a device using a battery as a power source are provided. The battery module assembly includes: at least two battery modules arranged along a first direction, each of the battery modules including a plurality of battery cells, and a shell side wall of the battery cell including two oppositely arranged first side walls and two oppositely arranged second side walls, an area of the first side wall being larger than that of the second side wall, and the first side wall being perpendicular to the first direction; and a cooling plate arranged between two adjacent battery modules, and configured to perform heat exchange with the first side walls of the battery cells of the two adjacent battery modules. The battery pack includes the battery module assembly. The device using a battery as a power source includes the battery pack.

公开(公告)号：US20210265679A1

公开(公告)日：2021-08-26

申请号：US15734355

申请日：2020-05-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Peng WANG ,  Kaijie YOU ,  Mu QIAN ,  Haizu JIN ,  Xingdi CHEN ,  Jun MA

IPC: H01M10/6556 ,  H01M10/625 ,  H01M10/613 ,  H01M10/615 ,  H01M10/647 ,  H01M10/6567 ,  H01M10/658

Abstract: The present application provides a battery pack, a method for producing a battery pack and a vehicle. The vehicle includes a vehicle body and a battery pack, the battery pack being disposed in the vehicle body. The battery pack includes a battery module and a case. The case has a containing chamber, and the battery module is located in the containing chamber. The battery module includes a plurality of battery units arranged in a horizontal direction, and each battery unit at least includes one battery cell. A size of the battery module in the horizontal direction is larger than a size of the battery module in a vertical direction. The size of the battery module in the vertical direction is L1, and a size of the battery pack in the vertical direction is L2, where 70%≤L1L2≤95%.

公开(公告)号：US20210119298A1

公开(公告)日：2021-04-22

申请号：US17138639

申请日：2020-12-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingdi CHEN ,  Kaijie YOU ,  Haizu JIN ,  Linggang ZHOU ,  Peng WANG ,  Dongyang SHI

IPC: H01M50/30 ,  H01M10/48 ,  H01M50/147 ,  H01M50/204 ,  H01M50/24 ,  H01M50/143

Abstract: This application relates to the field of energy storage components, and in particular, to a protective plate, a battery unit assembly, a battery module group, and a vehicle. The protective plate is provided with a guide groove. The protective plate is configured to shield an explosion-proof valve of a battery cell. The guide groove is configured to be disposed corresponding to the explosion-proof valve, and is configured to guide a flow direction of a flame ejected from the explosion-proof valve. In this application, the guide groove is disposed on the protective plate to guide the flame to a direction away from passengers, thereby protecting the passengers from injury.

公开(公告)号：US20210098774A1

公开(公告)日：2021-04-01

申请号：US16971118

申请日：2019-11-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiaowen ZHANG ,  Zhenhua LI ,  Haizu JIN

IPC: H01M4/131 ,  H01M4/66 ,  H01M4/134 ,  H01M4/133 ,  H01M4/62 ,  H01M4/137 ,  H01M4/36 ,  H01M10/0525

Abstract: This application relates to an electrochemical device. The electrochemical device comprises a positive electrode plate, a negative electrode plate and an electrolyte, wherein the positive electrode plate comprises a current collector, a positive electrode active material layer and a safety coating disposed between the current collector and the positive electrode active material layer; the safety coating comprises a polymer matrix, a conductive material and an inorganic filler; wherein based on the total weight of the polymer matrix, the conductive material and the inorganic filler, the polymer matrix is present in a content of from 35 wt % to 75 wt %, the conductive material is present in a content of from 5 wt % to 25 wt %, and the inorganic filler is present in a content of from 10 wt % to 60 wt %; and the electrolyte has a viscosity at normal temperature of ≤4 cp.

公开(公告)号：US20200343496A1

公开(公告)日：2020-10-29

申请号：US16717278

申请日：2019-12-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haizu JIN ,  Kaijie YOU ,  Yuepan HOU ,  Jun MA ,  Weilong LIN ,  Xingdi CHEN

IPC: H01M2/10 ,  H01M2/20 ,  H01M2/02

Abstract: The present disclosure discloses a battery module and a battery pack. The battery module comprises a plurality of battery cells and a first spacer. The cell comprises a first surface provided with an electrode terminal, a second surface opposite to the first surface, and side faces located between the first surface and the second surface. The side faces comprise abutting faces and connecting faces connected with the abutting faces; there are a plurality of battery cells, and the plurality of battery cells are arranged in a length direction, and the abutting faces of all the battery cells face to each other. At least part of the first spacer is arranged between the abutting faces of two adjacent battery cells, and fixed to two abutting faces, and the first spacer is used for fixation to a case.