Contemporary Amperex Technology Co., Ltd.

Ningde Amperex Technology Limited

Dongguan Amperex Technology Limited

Xiao Bo Chen

Wei Feng Chen

Lei Chen

Xin Sun

Xinru Su

Bangrun Wang

Baozhang Li

Haotian Xie

Min Zhang

Mianyu Xie

Ping Hua Deng

Quan Kun Li

Xue Hui Wang

Qing Feng Yuan

Wei Zhong Wu

Geng Li

Zhenglun Chen

Xingbu Chen

Chang Chuan Shi

Provided is a secondary battery, including: an electrode assembly, a packing bag, an electrode lead and an insulation part; the electrode assembly is housed in the packing bag having a sealing part on edge, and the electrode lead is connected to the electrode assembly and passes through the sealing part. The sealing part includes a main body area, a first step area and a first transition area which are located on same side of the electrode lead along width direction, and the main body area, first transition area and first step area are successively arranged along direction approaching the electrode lead; the insulation part is wrapped around the electrode lead, and has a first portion which is located on a side of the electrode lead close to the main body area along width direction and covered by the first step area on both sides in thickness direction.

Secondary battery with packing bag

An impact resistant wound cell comprises a first electrode plate with a first surface and a second surface. The first surface comprises a first active material area and a first current collector area, the second surface comprises a second active material area and a second current collector area. The first current collector area is located on an inner side of an outermost circle of the wound cell. In the first electrode plate, the second current collector area and the first current collector area are adjacent to and opposite to each other, the first current collector area and the second current collector area are bonded together by a first bonding member. The present disclosure further provides a battery using the wound cell.

Wound cell and battery using the same

A secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive-electrode active substance layer, the positive-electrode active substance layer contains a pre-lithiation agent, and a molecular formula of the pre-lithiation agent is LiNiCuMO, where 1&#x2264;x&#x2264;2, 0&#x3c;a&#x3c;1, and 0&#x2264;b &#x3c;0.1, and M is selected from one or more of Zn, Sn, Mg, Fe, and Mn. The negative electrode includes a negative-electrode active substance layer including graphite and silicon-containing material. The electrolyte contains fluoroethylene carbonate (FEC). A weight percentage of the pre-lithiation agent in the positive-electrode active substance layer, a weight percentage of silicon content in the negative-electrode active substance layer, and a weight percentage of FEC in the electrolyte satisfy 0.2&#xd7;W&#x2264;W&#x2264;7.5%&#x2212;0.6&#xd7;W.

Lithium secondary battery and battery module, battery pack, and electric apparatus containing same

Provided is a lithium ion battery including a battery can, a battery core received in the battery can, electrolyte filled in the battery can, and a battery cover assembled to the battery can. The battery can or the battery cover is provided with a pressure relief valve, and the pressure relief valve is coupled with a mesh cover defining a number of through holes therein. According to the present invention, when thermal runaway occurs to the lithium ion battery, the pressure relief valve breaks timely. Only gases and electrolyte vapor can pass through the mesh cover. Solid particles cannot pass through the mesh cover. Therefore, ignition of the flammable gases, the electrolyte vapor and the high temperature solid particles in the surrounding air afar from the pressure relief valve is avoided and the safety performance of the lithium ion battery can be improved remarkably.

Lithium ion battery having desirable safety performance

Growing community of inventors

Ningde, China

Xiao Bo Chen