Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Limited

Xiaoming Ge

Lingyan Jiang

Yukun Wu

Tao Liang

Yulei Fan

Yiheng Wang

Manman Wang

Zhengfang Zhang

Wei Zhong

Yongqiang Zhang

Binjie Tang

Ruoyan Ma

Xin Chen

An electrode assembly, a battery cell, a battery, and an electrical device are described. The battery cell includes a negative electrode plate and a positive electrode plate. The negative electrode plate includes a porous current collector and a first tab connected to at least one end of the porous current collector. The positive electrode plate includes a body portion and a second tab connected to at least one end of the body portion. The body portion and the porous current collector are stacked along a thickness direction of the porous current collector. Along a first direction, neither end of the porous current collector extends beyond the body portion. The first direction is perpendicular to the thickness direction of the porous current collector.

Electrode assembly, battery cell, battery, and electrical device

A method for preparing an electrolytic copper foil includes placing an anode and a cathode to be plated in a twin crystal growth agent containing electroplating solution in an electroplating tank, and, under conditions that the electroplating solution is provided with randomly alternating transitions of one or two of an ultrasonic wave at a frequency f11 and an ultrasonic wave at a frequency f12 and one or two of an ultrasonic wave at a frequency f21 and an ultrasonic wave at a frequency f22, performing direct current electroplating to obtain the electrolytic copper foil, wherein f11>40 kHz, 15 kHz<f12≤40 kHz, 0 kHz<f21≤15 kHz, and f22=0 kHz.

Electrolytic copper foil and preparation method therefor, negative electrode plate, secondary battery, battery module, battery pack and power consuming device

The present application provides a composite separator, an electrochemical energy storage apparatus, and an electrical apparatus. The composite separator provided in a first aspect of the present application may comprise: a first base film and a second base film; and an anode protection layer located between the first base film and the second base film in a thickness direction of the composite separator, for capturing transition metal ions. The anode protection layer for capturing transition metal ions may be arranged between the first base film and the second base film to prevent the anode protection layer from falling off from an outer surface of the base films during prolonged use, so that the anode protection layer can have more stable anode protection effects in prolonged use of the electrochemical energy storage apparatus, and improve the application performance of the electrochemical energy storage apparatus.

Composite separator, electrochemical energy storage apparatus, and electrical apparatus

This application relates to a positive electrode plate and a lithium-ion secondary battery, wherein the positive electrode plate comprises a positive electrode current collector and a positive active material layer disposed on at least one surface of the positive electrode current collector, wherein the positive active material layer comprises a first positive active material LiNiMeMOAand a second positive active material LiMnZOB, and wherein the positive electrode plate satisfies: 0.04&#x2264;R&#xb7;P/C&#x2264;10, wherein R is the resistance of the positive electrode plate, and the unit of R is &#x3a9;; P is the packing density of the positive electrode plate, and the unit of P is g/cm; C is the single-side areal density of the positive electrode plate, the unit of C is g/1540.25 mm. The lithium-ion secondary battery in this application simultaneously has high safety performance, low-temperature kinetic performance, high-temperature cycle performance and high-temperature storage performance.

Positive electrode plate and lithium-ion secondary battery

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Ningde, China

Xiaoming Ge