Battery pole piece structure and lithium ion battery comprising pole pieces

Abstract

The invention belongs to the technical field of batteries and particularly relates to a battery pole piece structure. The battery pole piece structure comprises pole pieces, wherein the pole pieces comprise a positive pole piece and a negative pole piece; electrode leads and electric heating leads are arranged on the pole pieces. Before a battery comprising the battery pole pieces is charged in a low-temperature environment, the electrode leads and the electric heating leads can be communicated with an external power supply respectively, so that the pole pieces form a power-on circuit, the external power supply introduces high pulse current into the pole pieces, the pole pieces are preheated rapidly, the battery can be charged normally when the pole pieces are preheated to 15-35 DEG C, and accordingly, a rapid charging temperature environment is provided for the battery. Besides, the preheating mode can be also used in a battery discharging condition, the external power supply introduces high pulse current into the pole pieces, so that the battery is preheated to be higher than subzero 10 DEG C, and accordingly, the battery can be discharged in a normal temperature environment. The invention further relates to a lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a battery pole piece structure and a lithium ion battery containing the pole piece. Background technique [0002] Secondary batteries with commercialized lithium-ion batteries as the mainstream have fully entered the mobile life of the public. In products such as smartphones, tablet computers, and smart wearable devices, lithium-ion batteries are basically used as power sources. However, with the continuous increase in the functional integration of portable mobile devices such as smartphones, the development of the Moore speed of integrated circuits, and the development of miniaturization, lightness, and personalization of equipment, the power consumption of smart portable mobile devices continues to increase. The space is continuously shrinking. As a result, the pressure on the energy density of batteries for smart mobile devices is increasing. On the other hand,...

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Problems solved by technology

On the other hand, when a fully charged lithium-ion battery is discharged at -20 degrees Celsius, its energy output ratio usually does not exceed 50% compared with the power output at room temperature; therefore, outdoor activities in winter or high altitude areas are often due to Smartphones or electric devices using lithium-ion bat

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