Ningde Amperex Technology Limited

Dongguan Amperex Technology Limited

Xue Hui Wang

Wei Li

Wei Feng Chen

Xiao Bo Chen

Quan Kun Li

Ping Hua Deng

Ru Lai Cai

Shao Gang Li

Wei Zhong Wu

Qiong Qu

Qing Feng Yuan

Shao-Gang Li

According to one embodiment of the present invention, a lithium ion battery having desirable safety performance is provided. The lithium ion battery includes a battery housing, a battery cover assembled to the battery housing, a pressure relief valve coupled to the battery housing and/or battery cover, and a safety device formed on the housing and/or battery cover and fixed to the pressure relief valve. The safety device includes a shielding plate facing the pressure relief valve, a side wall and an air flow channel structure. The side wall extends from the shielding plate and connects with the battery housing or the battery cover. The air flow channel structure is defined in the side wall.

Lithium ion battery and lithium ion battery pack

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

Xue Hui Wang