Sekundärbatterie und Elektronische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4773279

Anmeldetag

1. August 2024

Veröffentlichung

13. März 2025

Rechtsraum

EP

Abstract

A secondary battery and an electronic apparatus are provided. A positive electr ode sheet in the secondary battery includes a positive electrode current collector, a pos itive electrode active material layer, and a positive electrode tab, where the positive el ectrode active material layer is disposed on at least one surface of the positive electrod e current collector. The positive electrode active material layer is provided with a first groove exposing the positive electrode current collector. The positive electrode tab is disposed in the first groove and connected to the positive electrode current collector. An insulating tape is provided on each of a surface of the positive electrode tab and a r egion, corresponding to the first groove, of a surface of the positive electrode sheet aw ay from the positive electrode tab. A melting point of the insulating tape is 250°C to 4 50°C. An electrolyte includes carbonate and carboxylate. Based on a mass of the elect rolyte, a mass percentage of the carbonate is denoted as A and a mass percentage of th e carboxylate is denoted as B, where A and B satisfy: 75% ≤ A + B ≤ 88% and 1 < A / B. Through the above configuration, the secondary battery has good reliability.

Anmelder

Firma

Ningde Amperex Technology Limited

Land

🇨🇳 China