公开(公告)号：US20190214832A1

公开(公告)日：2019-07-11

申请号：US16351517

申请日：2019-03-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yingtao LI ,  Kui ZHOU ,  Qiang WANG ,  Guanghui ZHANG ,  Pinghua WANG

IPC: H02J7/00 ,  H02J7/02

Abstract: A fast charging method for a parallel battery pack is provided, including: obtaining a maximum charging current allowed by a charging trunk and a charging current required for charging a parallel battery pack; comparing the charging current required for charging the parallel battery pack with the maximum charging current allowed by the charging trunk; if the charging current required for charging the parallel battery pack is less than or equal to the maximum charging current allowed by the charging trunk, performing parallel charging on battery units; or if the charging current required for charging the parallel battery pack is greater than the maximum charging current allowed by the charging trunk, changing some or all of battery units in the parallel battery pack to a series connection, and performing series charging on the battery units. The fast charging method for a parallel battery pack can effectively shorten a charging time.

公开(公告)号：US20200381715A1

公开(公告)日：2020-12-03

申请号：US16998256

申请日：2020-08-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hang SU ,  Yangxing LI ,  Zhexun YU ,  Pinghua WANG

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M10/0525 ,  C23C16/26

Abstract: A composite material and a preparation method thereof are provided to solve the prior-art problem that a silicon anode material used in a battery is prone to cracking and pulverization. The composite material includes a layered silicon core and a plurality of carbon nanotubes. The layered silicon core includes a plurality of silicon-based material layers, and there is an interlayer spacing between two adjacent silicon-based material layers. Each silicon-based material layer has at least one through hole, and the silicon-based material layer includes silicon or silicon oxide. Each of the plurality of carbon nanotubes passes through the through holes on the plurality of silicon-based material layers.

公开(公告)号：US20200220347A1

公开(公告)日：2020-07-09

申请号：US16825332

申请日：2020-03-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xinyu LIU ,  Yanding LIU ,  Ce LIU ,  Pinghua WANG ,  Yong CAO

IPC: H02H7/18 ,  H02H1/00 ,  H02J7/00 ,  G01R19/165

Abstract: A power protection apparatus includes a protection integrated circuit (IC), a switch transistor group, and a sampling resistor. The protection IC is respectively connected to a positive electrode and a negative electrode of the cell and includes a mirror current input port, a mirror current output port, an operational amplifier, a voltage regulation switch transistor, and a charge-discharge protection circuit. The operational amplifier includes a positive input pin, a negative input pin, and an output pin. The switch transistor group is connected between the positive electrode of the cell and the load and is configured to turn on or turn off a charge-discharge loop of the cell, and the at least one control circuit is connected to the at least one charge-discharge protection circuit of the protection IC and is configured to receive a control signal of the protection IC to control the switch transistor group to be turned off to implement abnormity protection of the cell.

公开(公告)号：US20200220346A1

公开(公告)日：2020-07-09

申请号：US16825061

申请日：2020-03-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xinyu LIU ,  Yanding LIU ,  Ce LIU ,  Pinghua WANG ,  Yong CAO

IPC: H02H7/18 ,  H02J7/00

Abstract: A battery protection apparatus power protection apparatus is configured to protect an electrochemical cell connected to a load, and includes a protection IC, a switching transistor group, and a sampling resistor. The protection IC includes two power input terminals respectively connected to positive and negative electrodes of the electrochemical cell, and an operational amplifier, where the operational amplifier includes a positive input pin, a negative input pin, and an output pin. The switching transistor group is connected between the negative electrode of the electrochemical cell and the load, and is configured to control turn-on and turn-off of a charge and discharge circuit of the electrochemical cell. The sampling detection resistor Rs is serially connected between the sampling circuit detection terminal and the output pin, where the main circuit detection terminal is connected to the positive input pin, and the sampling circuit detection terminal is connected to the negative input pin.

公开(公告)号：US20190109483A1

公开(公告)日：2019-04-11

申请号：US16205418

申请日：2018-11-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dawei HUO ,  Jie DING ,  Pinghua WANG ,  Hui LI ,  Jinbo MA

IPC: H02J7/04 ,  G06N20/00

Abstract: The present disclosure provides a charging method and a terminal. The method includes: automatically learning, by the terminal, historical data by using a machine learning algorithm, to establish a habit model of a user, and matching a current time with the usage habit model of the user to determine a current charging intention of the user, so as to determine a charging mode according to the charging intention.. By means of the technical solutions, a charging requirement of a user can be effectively identified, and on-demand charging can be implemented. This improves user experience while avoiding a battery life decrease caused by frequent fast charging.

公开(公告)号：US20190051894A1

公开(公告)日：2019-02-14

申请号：US16159456

申请日：2018-10-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shengan XIA ,  Hui LI ,  Pinghua WANG

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525

Abstract: This application provides a silicon negative material, a silicon negative material preparation method, a negative electrode plate, and a lithium-ion battery. The silicon negative material includes a silicon core, and a buffer coating layer and a first coating layer that are coated on a surface of the silicon core, where the first coating layer is a coating layer including a carbon material, and the carbon material includes at least one of the following doping elements: N, P, B, S, O, F, Cl, or H. In embodiments of this application, fast charging performance of the silicon negative material when being used as a negative electrode of a battery is improved.