Rapid charging and discharging graphene power lithium battery and preparation method thereof

Abstract

The invention discloses a rapid charging and discharging graphene power lithium battery and a preparation method thereof. The battery comprises a battery housing and a battery core accommodated in thebattery housing. The battery core comprises a positive pole piece, a negative pole piece and a diaphragm; the positive pole piece comprises a positive pole current collector and positive pole material coatings respectively coated on two side surfaces of the positive pole current collector; the negative pole piece comprises a negative pole current collector and negative pole material coatings respectively coated on two side surfaces of the negative pole current collector; a conductive coating and a ceramic membrane are coated between the positive pole current collector and the positive pole material coating, a conductive coating and a ceramic membrane are coated between the negative pole current collector and the negative pole material coating, and the conductive coating is a CNT/graphenecoating; a positive pole active substance in a positive pole conductive agent in the positive pole material coating and a negative pole active substance in a negative pole conductive agent in the negative pole material coating are respectively subjected to coating treatment by graphene suspension liquid; and the positive and negative pole current collectors comprise a plurality of through holes which are arranged in a matrix and penetrate through the upper and lower surfaces of the substrate.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a graphene-powered lithium-ion battery and a preparation method thereof. Background technique [0002] The depletion of traditional fossil energy and the environmental problems caused by the combustion of fossil fuels have gradually attracted people's attention. Therefore, people are more and more urgent to the demand of developing a kind of high-efficiency, clean, environment-friendly energy. In the traditional energy storage system, lithium-ion batteries are widely used in mobile phones, computers, electric vehicles, etc. It has been widely used in the field of small batteries. [0003] However, since the lithium-ion battery generates heat due to overcoming the internal resistance (internal resistance) when it is loaded externally, this phenomenon is particularly obvious during rapid charging and discharging. If the heat cannot be dissipated in a timely manner,...

AI Technical Summary

Problems solved by technology

However, the lithium-ion battery disclosed in this patent application welds the short tabs to the long tabs, and so on, and then welds them on the cover plate or the cover plate connecting piece. This method is difficult to realize when there are many tabs.

[0007] It can be seen that although the existing technology has improved the rapid charge and discharge performance of lithium-powered batteries to a certain extent, the production efficiency of the existing technology is relatively low, the product consistency is relatively poor, and automatic production is relatively difficult, and it has not fundamentally solved the problem of battery production. Thermal and Safety Concerns

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