Batteriezelle, Herstellungsverfahren Dafür, Batterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4787558

Anmeldetag

30. April 2024

Veröffentlichung

8. Mai 2025

Rechtsraum

EP

IPC

H01M50/107

Abstract

The present application relates to the technical field of batteries, and provides a battery cell, a manufacturing method therefor, a battery and an electrical apparatus. The battery cell comprises a battery core assembly and an outer package; the battery core assembly comprises a positive electrode sheet, an active material coating being provided on the positive electrode sheet, and the active material coating comprising a sodium-containing copper-based layered oxide; the outer package is used for packaging the battery core assembly. A ventilation member is provided in the outer package, the ventilation rate of the ventilation member being equal to or larger than the maximum required venting capacity of the battery cell in total cycle time per unit, and the maximum required venting capacity of the battery cell in the total cycle time per unit being obtained by converting the volume of carbon dioxide generated by cleavage of Cu-O bonds and oxygen release in the sodium-containing copper-based layered oxide. The battery cell of the present application uses the ventilation member to timely discharge the redundant gas generated by the cleavage of Cu-O bonds in the working process of the battery out of the battery cell, such that the problem of battery cell failure caused by valve opening of a pressure relief mechanism of the battery cell due to the internal gas pressure being too large and reaching a threshold value of the pressure relief mechanism is less likely to occur.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China

Fachgebiete