Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Guangjun Wang

Yonghuang Ye

Shaojun Niu

Mianyu Xie

Jiawel Zheng

Chenchen Zhang

Yueying Lan

Dongsheng Luo

Jiawei Zheng

This application discloses a secondary battery and a device containing the secondary battery. A positive active material of the secondary battery includes one or more of lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, and a modified material thereof. A negative active material of the secondary battery includes a silicon-oxygen compound and graphite. A separator of the secondary battery includes a substrate and a coating layer. The secondary battery satisfies: where ED≥270 Wh/Kg, 11 μm≤D50≤18.5 μm, 11 μm≤D50≤20 μm. The secondary battery according to this application achieves relatively high cycle performance while achieving a relatively high energy density concurrently.

Secondary battery and device containing same

A charging control method for a battery pack at least including two batteries connected in parallel. The method includes determining, based on a charging parameter, states of charge (SOCs) corresponding respectively to the batteries at elapsing of a preset charging time, calculating, according to the SOCs, an amount of charge transfer between the batteries after stopping charging at the elapsing of the preset charging time, judging whether a charge-receiving battery is in a critical overcharge state according to the amount of charge transfer, and, in response to the charge-receiving battery being in the critical overcharge state, stopping charging the battery pack at the elapsing of the preset charging time.

Charging control method for battery pack, charging control apparatus for battery pack, electronic device, and storage medium

This application discloses a battery cushion and a forming method thereof, and a battery module and a forming method thereof. The battery cushion includes a body and breakable bubbles. The breakable bubbles are disposed in the body. The breakable bubbles include at least a first bubble and a second bubble. A breaking pressure of the first bubble is less than a breaking pressure of the second bubble, so that the battery cushion can release a space occupied by the battery cushion in a progressive manner under different external forces. The battery cushion disclosed in this application can not only achieve a pre-tightening force required during assembly of the battery module but also effectively relieve an expansive force generated during working of the battery module.

Battery cushion and forming method thereof, and battery module and forming method thereof

Provided is a secondary battery, comprising an electrode assembly, a packaging bag, and electrode leads. The electrode assembly is accommodated in the packaging bag and comprises a first electrode member, a second electrode member and a separator. The separator separates the first electrode member from the second electrode member. The first electrode member comprises an insulating substrate, a conductive layer, an active material layer and a conductive structure. The conductive layer is provided on the surface of the insulating substrate, and the conductive layer is provided with a first portion and a second portion. The first portion is coated with the active material layer. The second portion is not coated with the active material layer. The conductive structure is welded to the second portion to form a first welding area. The electrode leads are connected to the conductive structure and extend to the outside of the packaging bag.

Secondary battery

This application discloses a secondary battery and a device containing the secondary battery. A positive active material of the secondary battery includes one or more of lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, and a modified material thereof. A negative active material of the secondary battery includes a silicon-oxygen compound and graphite. A separator of the secondary battery includes a substrate and a coating layer. The secondary battery satisfies: where ED&#x2265;270 Wh/Kg, 11 &#x3bc;m&#x2264;D50&#x2264;18.5 &#x3bc;m, 11 &#x3bc;m&#x2264;D50&#x2264;20 &#x3bc;m. The secondary battery according to this application achieves relatively high cycle performance while achieving a relatively high energy density concurrently.

The present application provide a secondary battery and an apparatus containing the secondary battery. The secondary battery includes an outer packaging film, an electrode assembly and an electrolyte accommodated, the electrode assembly includes a positive electrode plate, a negative electrode plate and a separator, the positive electrode plate includes a positive electrode current collector and a positive electrode membrane arranged on at least one surface of the positive electrode current collector and including a positive electrode active material, the negative electrode plate includes a negative electrode current collector and a negative electrode membrane arranged on at least one surface of the negative electrode current collector and comprising a negative electrode active material, the positive electrode active material includes a lithium-contained nickel cobalt manganese oxide and/or a lithium-contained nickel cobalt aluminum oxide, the negative electrode active material includes a silicon-based material and a carbon material; the secondary battery satisfies: &#x2212;4&#x2264;2*&#x221a;{square root over (C)}*C*C+0.1&#x2212;L&#x2212;F&#x2264;2.

Growing community of inventors

Ningde, China

Guangjun Wang