Sekundärbatterie und Batteriemodul

Details

Veröffentlichungs-Nr.

EP3675202

Aktenzeichen

EP19179981

Anmeldetag

13. Juni 2019

Veröffentlichung

14. April 2021

Erteilung

14. April 2021

Rechtsraum

EP

IPC

H01M2/02H01M2/26H01M10/04H01M10/0587// H01M2/04

Abstract

The present disclosure relates to a secondary battery and a battery module. The secondary battery (10) comprises a case (11), comprising a base plate (111) and a side plate (112) connected with the base plate (111), wherein the base plate (111) and the side plate (112) form a receiving hole (11a) and an opening in communication with the receiving hole (11a), the opening is arranged opposite to the base plate (111) in an axial direction (Z) of the receiving hole (11a), and the base plate (111) has a thickness larger than that of the side plate (112); a cap assembly (13), sealingly connected with the side plate (112) to close the opening; and an electrode assembly (12), disposed in the receiving hole (11a) and comprising two or more electrode units (121), wherein the electrode unit (121) comprises a first electrode plate (12a), a second electrode plate (12b) and a separator (12c), and has a wide side (121a) and a narrow side (121b), the two or more electrode units (121) are stacked in the axial direction (Z), and each electrode unit (121) is arranged with the wide side (121a) opposite to the base plate (111) and the narrow side (121b) toward the side plate (112). The secondary battery according to the embodiments of the present disclosure has a small expansion amount or has no expansion in its thickness direction, and thus has a low requirement on rigidity and strength on an external fixing member when grouped into a battery module, which is conducive to improve energy density.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China

Fachgebiete