Huawei Technologies Co., Limited

Shenzhen Xpectvision Technology Co., Ltd.

Huawei Digital Power Technologies Co., Ltd.

Guanghui Zhang

Yingtao Li

Pinghua Wang

Kui Zhou

Zhe Li

Qiang Wang

Zhen Qin

Xiaosheng Zeng

Jianbo Zhang

Yuejiu Zheng

Kai Feng

Bingxiao Liu

Jianping Jiang

Laisuo Su

Dental x-ray device

Intraoral detector system

A battery module, a battery pack, and a vehicle are described in this patent application. In the battery module, a plurality of grooves separated by partition parts are disposed in a module casing, a plurality of jelly rolls of the battery module are embedded in the grooves, and a top cover covers an opening of each groove to seal the groove as an independent mounting cavity. In this way, each groove wall in the module casing and the top cover may be used as a housing for sealing each jelly roll, to avoid a case in which an electrolyte in each jelly roll decomposes and produces gas in a process of using the battery module because the electrolyte is leaked from one jelly roll to another jelly roll.

Battery module, battery pack, and vehicle

A method and an apparatus for detecting a micro short circuit of a battery are provided. The detection method includes: obtaining a first reference charge capacity at a first charging end moment and a second reference charge capacity at a second charging end moment of a to-be-detected single battery included in a to-be-detected battery pack (S), where the reference charge capacity is a difference between an electric quantity of the to-be-detected single battery and an electric quantity of a reference single battery, and the reference single battery is a single battery, which has a largest voltage value at a charging end moment, in all single batteries included in the to-be-detected battery pack; and determining, based on a difference between the first reference charge capacity and the second reference charge capacity, that a micro short circuit occurs in the to-be-detected single battery.

Method and apparatus for detecting micro short circuit of battery

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.

Fast charging method and related device for parallel battery pack

A fast charging method, a fast charging system, and a fast charging apparatus for a series battery pack, where the fast charging method including obtaining charge parameters of battery units in a series battery pack, determining, based on the charge parameters, whether there is a differentiated battery unit in the series battery pack, where the differentiated battery unit is a battery unit whose charge parameter is different from a charge parameter of the rest battery units in the series battery pack, and changing the battery units in the series battery pack to a parallel connection when there is a differentiated battery unit in the series battery pack, and performing parallel charging on the battery units. Hence, the fast charging method for a series battery pack can effectively shorten a charging time.

Fast charging method and related device for series battery pack

A method for detecting a battery state of health includes a current and a voltage are measured twice in a period of time; corresponding model algorithms are selected according to the measured current values; corresponding battery open circuit voltage values and battery state of charge values at a start time and an end time of the period are obtained based on the model algorithms; a battery capacity difference that indicates a present battery retention capacity and a battery capacity difference that indicates a future battery retention capacity are calculated; and a battery state of health value is calculated when impact of a measured battery temperature value is considered.

Apparatus and method for detecting battery state of health

Growing community of inventors

Dongguan, China

Guanghui Zhang