公开(公告)号：US11750013B2

公开(公告)日：2023-09-05

申请号：US17008830

申请日：2020-09-01

Applicant: Ningde Amperex Technology Limited

Inventor： Ting Guan ,  Shan Zhu ,  Fei Wu

IPC: H02J7/00

CPC classification number: H02J7/00714 ,  H02J7/0048 ,  H02J7/007182 ,  H02J7/007192

Abstract: A method for charging a battery, and electronic device using the method, includes charging the battery with a first charge current Im at constant current in a mth charge-discharge cycle of the battery, wherein the battery has a first cut-off voltage V1 when the constant current charging stage of the battery is cut off in the mth charge-discharge cycle. The first charge current Im is calculated according to a formula Im=In+k×In, where, 0

公开(公告)号：US12095299B2

公开(公告)日：2024-09-17

申请号：US17033835

申请日：2020-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Ting Guan ,  Shan Zhu ,  Fei Wu

IPC: H02J7/00

CPC classification number: H02J7/0048 ,  H02J7/0071 ,  H02J7/00712 ,  H02J7/007182

Abstract: 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%.

公开(公告)号：US12088136B2

公开(公告)日：2024-09-10

申请号：US17281355

申请日：2019-10-21

Applicant: Ningde Amperex Technology Limited

Inventor： Ting Guan ,  Shan Zhu ,  Fei Wu

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/48

CPC classification number: H02J7/007182 ,  H01M10/44 ,  H01M10/48 ,  H02J7/0049 ,  H02J7/00714

Abstract: A method of charging a battery, including: in an mth charge and discharge cycle, constant-current charging a battery to a first cut-off voltage Um at a charging current, where m is any two or more integers of 1, 2, 3, . . . , x, and Um has different values in at least two charge and discharge cycles. The method shortens fully charged time of a battery and further ensure that phenomena of lithium precipitation and overcharge do not occur on the battery, thereby prolonging a service life of the battery.

公开(公告)号：US11750012B2

公开(公告)日：2023-09-05

申请号：US17007417

申请日：2020-08-31

Applicant: Ningde Amperex Technology Limited

Inventor： Shan Zhu ,  Ting Guan ,  Fei Wu

IPC: H02J7/00 ,  G01R31/392 ,  H01M10/44 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H02J7/00714 ,  G01R31/392 ,  H01M10/0525 ,  H01M10/443 ,  H02J7/005 ,  H02J7/0048 ,  H02J7/0069 ,  H02J7/007192 ,  H01M2010/4292 ,  H02J7/0071 ,  H02J7/007194

Abstract: A charging method for charging a battery, including the following steps: obtaining a lithium deposition potential of the anode; obtaining a first charging current In at different states of charge (SOC) during an nth charge and discharge cycle based on the lithium deposition potential of the anode, the n is an integer greater than or equal to 0; and during an mth charge and discharge cycle, charging the battery with a second charging current Im, m is an integer greater than n, and Im=k1×In, 0.5≤k1≤1. The present application also provides an electronic device and a storage medium. The above-mentioned charging method, electronic device and storage medium can quickly charge the battery.

公开(公告)号：US20230238818A1

公开(公告)日：2023-07-27

申请号：US18128411

申请日：2023-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Ting Guan ,  Shan Zhu ,  Fei Wu

IPC: H02J7/00

CPC classification number: H02J7/007 ,  H02J7/0013

Abstract: A charging method for battery, including: in an n-th charging process, charging a first battery to a charge cut-off voltage Un and a charge cut-off current In in a first charging manner; then, leaving the first battery standing, and obtaining an open-circuit voltage OCVn of the first battery at a standing time of ti; in an m-th charging process and subsequent charging processes, charging the first battery to the charge cut-off voltage Un and the charge cut-off current In in the first charging manner; then, leaving the first battery standing, and obtaining an open-circuit voltage OCVm of the first battery at the standing time of ti; and under the condition of OCVn>OCVm, continuing to charge the first battery that has been standing in a second charging manner until the charge cut-off current of the first battery is a first current Im, where Im=(Un−k×OCVn−(1−k)×OCVm)/(Un−OCVm)×In, and 0

公开(公告)号：US20230327218A1

公开(公告)日：2023-10-12

申请号：US18181209

申请日：2023-03-09

Applicant: Ningde Amperex Technology Limited

Inventor： Ting Guan ,  Ruitao Wu ,  Shan Zhu ,  Fei Wu

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

CPC classification number: H01M10/0587 ,  H01M10/0525 ,  H01M50/538 ,  H01M2220/30

Abstract: An electrochemical apparatus includes an electrode assembly, where the electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator for separating the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode current collector, a positive electrode active material layer, and a non-active material layer. The positive electrode active material layer is formed on a surface of the positive electrode current collector, and the non-active material layer is formed on a surface of the positive electrode active material layer away from the positive electrode current collector. In a first direction, the non-active material layer has a thickness of 1 µm to 20 µm, where the first direction is a thickness direction of the positive electrode current collector. A diffusion rate of lithium ions in the non-active material layer is less than that in the positive active material layer.

公开(公告)号：US20230335809A1

公开(公告)日：2023-10-19

申请号：US18211963

申请日：2023-06-20

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Shan Zhu ,  Ting Guan ,  Fei Wu ,  Hongming Yu

IPC: H01M10/44 ,  H02J7/00

CPC classification number: H01M10/44 ,  H02J7/0048 ,  H02J7/00714 ,  H02J7/007182

Abstract: A battery charging method is provided, including: constant-current charging the battery with a first charge current I1 to a first voltage U1 and constant-voltage charging the battery with the first voltage U1 to a first charge cut-off current I1′ (S1); constant-current charging the battery with the first charge current I1 to a second voltage U2, where U2 is a limited charge voltage of the battery, and U2>U1 (S2); and constant-current charging the battery with a second charge current I2 to a third voltage U3 and constant-voltage charging the battery with the third voltage U3 to a second charge cut-off current I2′, where U3>U2, I2

公开(公告)号：US20230207818A1

公开(公告)日：2023-06-29

申请号：US18115418

申请日：2023-02-28

Applicant: Ningde Amperex Technology Limited

Inventor： Shan Zhu ,  Ting Guan ,  Fei Wu

IPC: H01M4/62

CPC classification number: H01M4/623 ,  H01M2004/028

Abstract: An electrode plate includes: a current collector; a first coating applied onto the current collector includes an active material, and the first coating includes a first edge part, a middle part, and a second edge part sequentially in a width direction of the current collector; and a second coating, including a first part disposed on the first edge part and a second part disposed on the second edge part. A first bonding force is exerted by a surface of the first part that is away from the first edge part. A second bonding force is exerted by a surface of the second part that is away from the second edge part. A third bonding force is exerted by a surface of the middle part that is away from the current collector. Both the first bonding force and the second bonding force are greater than the third bonding force.