University of Science and Technology Beijing

North China Institute of Science and Technology

Shell USA, Inc.

Beijing Anke Xingye Science and Technology Co., Ltd.

Beijing Anke Technology Co., Ltd.

Jinhai Liu

Tao Zhou

Gang Yao

Quande Wei

Sitao Zhu

Yitong Huang

Chao Wang

Xiufeng Zhang

Jianqiu Li

Minggao Ouyang

Languang Lu

Huan Li

Zhengyu Chu

Yudi Qin

Shaohua Sun

Xiaocheng Qu

Longkai Hao

Xiaoguang Shang

Jiajie Li

Xuyou Wang

Gaoang Wang

Shidong Li

Qingbo He

Huadong Xie

Zhen Kong

Fuxing Jiang

The present application relates to a method and system for determining parameters of battery pulsed heating. The reference potential of the anode of the lithium-ion battery is obtained in real time in the positive and negative pulsed heating process under various heating parameters. The relationship between reference potential and threshold potential indicates whether Li plating has occurred to the lithium-ion battery. When the reference potential is smaller than the threshold potential, the first heating parameters are adjusted to avoid Li plating and improve battery life. By recording the heating parameters when the reference potential is greater than the threshold potential, it can be ensured that the pulsed heating parameters have no significant impact on the life of the battery.

Method and system for determining parameters of battery pulsed heating

A method for monitoring hydraulic fracturing range of a surface vertical shaft is provided by the present disclosure, belonging to the technical field of ultrahigh-pressure hydraulic fracturing monitoring of the coal mine vertical shafts. The method comprises the following steps: connecting, by an eight-thread communication cable, a high-precision portable micro-seismic monitoring acquisition instrument to a high-sensitivity deep hole sensor, and performing uphole-crosshole-downhole monitoring simultaneously, specifically as follows: providing uphole-crosshole-downhole monitoring holes respectively, and installing deep hole geophones in the monitoring holes; then laying communication cables uphole-crosshole-downhole to connect the geophones to the portable high-precision micro-seismic acquisition instrument respectively; then performing high-precision positioning on the fissure development range by monitoring recorded events and time, thus determining the directions and ranges of a main fracture and secondary induced fractures of hydraulic fractures.

Method for monitoring hydraulic fracturing range of surface vertical shaft

The present disclosure provides a coal bump control method for sectional hydraulic fracturing regions of a near vertical ultra thick coal seam. The method includes: deepening a main shaft from a mining level to a fracturing level; excavating a cross-hole from a roof rock layer of a coal seam at the fracturing level to enter a coal seam being mined, and excavating a roadway along the strike of the coal seam; and drilling hydraulic fracturing boreholes in a dedicated fracturing roadway along an inclination angle of the coal seam to the coal seam above the roadway, wherein the length of the borehole makes the borehole in communication with a goaf, and the spacing of the boreholes along the strike and the sectional spacing of the boreholes in an inclination direction are designed according to the parameters of fracturing equipments and the fracturing length.

Coal bump control method for sectional hydraulic fracturing regions of near vertical ultra thick coal seam

Growing community of inventors

Beijing, China

Jinhai Liu