Ningde Amperex Technology Limited

Ningde Amperex Technology Limit Ed

Haiyang Nan

Chuantao Song

Zhiwen Xiao

Zuchao Liu

Xinru Su

Wei Peng Huang

Jianming Zheng

Chao Tang

Yisong Su

Xiexue Peng

Rui Li

A battery cell includes an electrode assembly and a packaging bag, where the electrode assembly includes a tab, the packaging bag is configured to accommodate the electrode assembly, a sealing zone is formed on a periphery of the packaging bag, one end of the tab is electrically connected to a body of the electrode assembly, and an other end of the tab protrudes out of the sealing zone; the sealing zone is provided with a weak zone, and in a predetermined temperature range, a packaging tension of the weak zone in the packaging bag reduces to release gas inside the battery cell to the outside of the battery cell.

Battery cell and electronic apparatus having such battery cell

The present application relates to an electrochemical device comprising a separator and an electrolyte, wherein the separator comprises a first porous layer and a second porous layer; and the electrolyte comprises at least one compound containing 2 to 3 cyano groups.

Electrochemical device

The present application discloses a battery, an electronic device and a battery pack. The battery according to one embodiment comprises a battery cell assembly, the battery cell assembly including a first tab and a protection assembly. The protection assembly is connected to the first tab, and comprises a breaker and a first unidirectional conduction element, the breaker and the first unidirectional conduction element are connected in parallel. The battery, the electronic device and the battery pack provided by the embodiments of the present application may achieve overcharge protection on a soft package battery, and may meet a performance requirement of the soft package battery for discharge at large current.

Battery, electronic device and battery pack

The present disclosure relates to a technical field of cells, and discloses a protection device and a battery. The protection device includes: a first connecting member; a second connecting member; a first element; and an elastic sheet. When the elastic sheet has a temperature lower than a first temperature, the elastic sheet is connected to at least one of the first connecting member and the second connecting member; when the temperature of the elastic sheet is equal to the first temperature, the elastic sheet is deformed to allow the first connecting member, the second connecting member, the elastic sheet and the first element to form a series circuit. When the protection device is not triggered, the temperature of the elastic sheet is lower than the first temperature, and the elastic sheet is connected to at least one of the first connecting member and the second connecting member.

Protection device and battery

The present invention discloses a cell and a battery, wherein the cell comprises a body including a first electrode tab; and a choke that triggers after the temperature reaches a certain value to reduce the current passing through it; the choke is electrically connected to the first electrode tab, and a product of the length of connection path from the choke to the first electrode tab and a cooling coefficient of the connection path is smaller than a difference between a first temperature of the first electrode tab and a second temperature of the choke, wherein the second temperature of the choke is a temperature when the choke is triggered. In the above-mentioned cell, if the trigger action of the choke is timely, the body of the cell can be prevented from reaching the overcharge state, and the choke in the above-mentioned cell can further effectively protect the cell.

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Ningde, China

Haiyang Nan