Lithiumbatterie und Elektrofahrzeug

Details

Veröffentlichungs-Nr.

EP4756904

Anmeldetag

25. Juni 2024

Veröffentlichung

6. Februar 2025

Rechtsraum

EP

Abstract

The lithium battery comprises a positive electrode plate, a negative electrode plate and an electrolyte. The positive electrode plate comprises a positive electrode current collector and a positive electrode material layer provided on the surface of at least one side of the positive electrode current collector. A positive electrode active material of the positive electrode material layer comprises LiFe<1-a>Mn<a>PO<4> and a lithium transition metal oxide. The mass of LiFe<1-a>Mn<a>PO<4> accounts for X<1>% of the total mass of LiFe<1-a>Mn<a>PO<4> and the lithium transition metal oxide, 0< X<1><100, and 0≤a≤0.8. The electrolyte comprises vinylene carbonate with a mass ratio of A%. The lithium battery satisfies: 0<100α/X<1>≤600 and 0≤DCIR×C<0>×A×X<1>≤30, wherein C<0> is the discharge capacity at 0.33C of the lithium battery at 25° C; DCIR is the direct current internal resistance of the lithium battery measured based on C<0>; and α is the Fe content in a negative electrode material of the negative electrode plate of the lithium battery after cycled for 500 times at 1C<0> at 45° C.

Anmelder

Firma

BYD Company Limited

Land

🇨🇳 China