Glass fiber baffle plate and lithium ion battery adopting glass fiber buffer plate

Abstract

The invention discloses a glass fiber buffer plate which comprises 80-97% of glass fiber by mass and 3-20% of adhesive glue by mass. The invention further discloses a production method of the glass fiber buffer plate and a lithium ion battery having the glass fiber buffer plate; compared with the general glass fiber buffer plate with the same specification, the strength of the glass fiber buffer plate disclosed by the invention is improved more than 500%; the toughness of the glass fiber buffer plate is reinforced; the glass fiber buffer plate is reduced to be as the thickness of a lithium ion buffer plate. The glass fiber porosity is generally above 80%, and is far higher than the porosity of a high-molecular polymer buffer plate; meanwhile, the high-temperature resistance of the glass fiber buffer plate is prominent, the high-temperature short circuit can be effectively prevented when the glass fiber buffer plate is used as the lithium ion battery buffer plate; the internal short-circuit resistant capacity is prominent; the heat diffusion in the internal short circuit can be effectively controlled; the overall battery safety performance is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a glass fiber separator, a preparation method thereof and a lithium ion battery using the glass fiber separator as a separator. Background technique [0002] At present, lithium-ion secondary batteries on the market have become mainstream products in the consumer electronics market, but their development in new product markets - light electric vehicles, low-speed vehicles and other markets is relatively slow. One of the important reasons is that existing The safety performance of lithium-ion secondary battery products needs to be improved. [0003] In markets requiring relatively high energy, such as light electric vehicles and low-speed vehicles, the energy density requirements of batteries are not high, but the requirements for safety performance and cycle life are relatively high. Product requirements are different. [0004] One of the main reasons for the poor...

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Problems solved by technology

[0006] At the same time, in the prior art, glass fiber separators have been used as separators in lead-acid batteries, but they cannot adapt to the working conditions of lithium-ion batteries.

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