Ningde Amperex Technology Limited

Contemporary Amperex Technology Co., Ltd.

Dongguan Amperex Technology Limited

Contemporary Amperex Technology Limited

Yu Luo

Kefei Wang

Qiao Zeng

Fuping Luo

Shengwei Wang

Qiang Zheng

Chao Gao

Jiacai Cai

Zhimin Dan

Haizu Jin

Kai Wu

Wei Li

Yongshou Lin

Xiong Zheng

Xianxi Pan

Zhanzhao Fang

Jiandong Yang

This application provides a permanent-magnet synchronous machine control method and device, and a permanent-magnet synchronous machine control system. The method includes: obtaining a d-axis current iand a q-axis current iin a permanent-magnet synchronous machine control loop at a current moment; obtaining a fifth-order harmonic current iand a seventh-order harmonic current iin the d-axis current iin the permanent-magnet synchronous machine control loop at the current moment, and a fifth-order harmonic current iand a seventh-order harmonic current iin the q-axis current iin the permanent-magnet synchronous machine loop at the current moment; determining a d-axis current iat a next moment in each switch state; determining a q-axis current iat the next moment in each switch state based on the first current i, the second current i, and the second voltage in each switch state; and determining a control policy of the permanent-magnet synchronous machine.

Permanent-magnet synchronous machine control method and device, and permanent-magnet synchronous machine control system

A wound-type cell includes a first electrode plate; a second electrode plate; a separator, disposed between the first electrode plate and the second electrode plate; a first electrode tab electrically connected to the first electrode plate; and a second electrode tab electrically connected to the second electrode plate, in which the separator includes a third winding start end, the third winding start end is folded back to an inner side in a thickness direction and is disposed between the first electrode tab and the second electrode tab in a length direction.

Wound-type cell

The present disclosure provides a wound-type cell which includes: a first electrode plate; a second electrode plate; a separator disposed between the first electrode plate and the second electrode plate; a first electrode tab electrically connected to the first electrode plate; and a second electrode tab electrically connected to the second electrode plate; in which a third winding start end of the separator is positioned at an outer side of a second winding start end of the second electrode plate in a length direction; the third winding start end extends along a direction away from a second end of the second winding start end and the third winding start end is not folded back.

The present application relates to an electrode sheet for Li-ion battery and a Li-ion battery including the same. The Li-ion battery includes a current collector and a diaphragm layer coated on the current collector, the current collector includes a coating region and at least one electrode tab region, the coating region is a region of the current collector coated with the diaphragm layer; the coating region is adjoined with the electrode tab region, a stress releasing region is provided at adjoining position of the coating region and at least one electrode tab region. The stress releasing region provided by the present application can reduce stress received by the diaphragm during rolling and stretching processes, which can avoid cracking of electrode tab and electrode sheet, and can improve battery cycling performance and, at the same time, can also be fused in short circuit, thereby improving safety performance of the battery.

Electrode sheet for Li-ion battery and Li-ion battery including the same

Embodiments of the present application provide a method of battery charging, which relates to the field of battery charging and is capable of effectively improving safety performance of the battery. The method includes: obtaining an anode open circuit voltage curve, an anode impedance curve, a lithium deposition potential threshold and a state of charge, corresponding to a battery; determining a current anode open circuit voltage according to the anode open circuit voltage curve and the state of charge; determining a current anode impedance according to the anode impedance curve and the state of charge; determining a current charging current according to the current anode open circuit voltage, the current anode impedance and the lithium deposition potential threshold; and charging the battery according to the current charging current. Embodiments of the present application are applicable to a rapid battery charging process.

Method and apparatus of battery charging

The present invention provides a fast charging method for battery, including the steps as follows: (1) the battery is charged with a constant current Iand the charging time is t; (2) the battery is charged with a constant current Iand the charging time is t; (3) the battery is discharged with the constant current Iand the discharging time is t, recycling until the voltage reaches a pre-charging voltage of battery; (4) the battery is standed after the voltage reaching the pre-charging voltage of battery, and the rest time is t, and then the battery is charged with a constant current Iuntil the voltage reaching a cut-off voltage of battery, and then the battery is charged with a constant voltage until the current reaching a cut-off current I; wherein, I&#x3c;I, t&#x3c;t, t&#x3c;t, I&#x3c;I&#x2266;I, I&#x2266;I. The fast charging method provided in present invention can decrease the polarization in pulse charging phase, increase the time of whole pulse charging phase, improve the charging speed in pulse charging phase, and thus shorten the full-charging time.

Fast charging method for battery

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Ningde, China

Yu Luo