High-rate, high-safety and long-service-life 21700 cylindrical capacitor battery capable of supporting ultra-low-temperature rapid charging and preparation method thereof

Abstract

The invention discloses a high-rate, high-safety and long-service-life 21700 cylindrical capacitor battery capable of supporting ultra-low-temperature rapid charging and a preparation method thereof. The high-rate, high-safety and long-service-life 21700 cylindrical capacitor battery capable of supporting ultra-low-temperature rapid charging comprises a positive plate, a negative plate, electrolyte, a diaphragm, a shell and a cap, wherein a first insulating spacer and a second insulating spacer are respectively mounted at the bottom and the top of the shell, a positive lug is arranged on the positive plate, a negative lug is arranged on the negative plate, the positive plate and the negative plate are arranged in the shell, the positive plate comprises positive slurry and a current collector, and the positive slurry is composed of positive electrode material powder and a dispersing agent. By adopting the step current vacuum formation and small current step formation method, the side reaction on the surface of the pole piece can be fully carried out, and an SEI film formed on the surface of the pole piece is more compact and stable, so that the specific energy of the capacitor battery is improved, and the service life of the capacitor battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium batteries and capacitors, in particular to a 21700 cylindrical capacitor battery supporting ultra-low temperature fast charging, high rate, high safety and long life and a preparation method thereof. Background technique [0002] With the continuous strengthening of environmental protection awareness, the new energy industry has attracted much attention. The application and popularization of smartphones, tablet computers, wearable smart devices, mobile power supplies, new energy vehicles, electric bicycles, electric tools and energy storage power stations will give lithium ion The battery industry has brought unprecedented development opportunities, but battery technology with wide operating temperature range, high specific energy, high safety, and long life needs to continue to break through. [0003] In the process of developing a wide operating temperature range, high specific energy, high safe...

AI Technical Summary

Problems solved by technology

But the issues that need to be considered include: How to evaluate the minimum power of silicon cells required for digital equipment? Will the harmonics generated during the charging process of silicon hair affect high-precision digital equipment, especially communication equipment? And so on, these series of problems are difficult to solve

At present, due to problems such as cost or actual demand, the energy storage batteries used by many troops are still lead-acid batteries. The chemical cost of lead-acid batteries has an impact on the local environment and ecology, and may also affect the physical and mental health of garrison officers and soldiers. cause some damages

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