Lithium ion battery with built-in protective plate

Abstract

The invention discloses a lithium ion battery with a built-in protective plate, and relates to the technical field of the lithium ion battery. The lithium ion battery comprises a protective plate, a positive electrode tab, a negative electrode tab, an inner membrane and an outer membrane, wherein the protective plate, the positive electrode tab and the negative electrode tab are packaged between the inner membrane and the outer membrane; the protective plate is welded above the positive electrode tab and the negative electrode tab; the inner membrane is packaged below the positive electrode tab and the negative electrode tab, and the outer membrane is packaged above the protective plate; the two sides of the inner membrane and the outer membrane are packaged into a whole body; the protective plate is used for protecting the lithium ion battery; and the inner membrane and the outer membrane are used for the protective plate, the positive electrode tab, the negative electrode tab and the lithium ion battery. By arranging the protective plate in the inner membrane and the outer membrane of the lithium ion battery, a packaging process is reduced, so that the cost is lowered, and a good waterproof function is realized; meanwhile, the service life of the protective plate is prolonged, and the service life and the safety in use of the lithium ion battery are prolonged and improved; in addition, the protective plate is not in contact with an external environment, so that gas explosion can be avoided; and therefore, the lithium ion battery has high weather fastness.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery with a built-in protection plate. Background technique [0002] Lithium-ion batteries have many advantages such as high voltage, high energy density, long cycle life, long storage time, environmental protection and light weight, and are not only widely used in portable electronic devices such as mobile phones, digital cameras and notebook computers, And it is also widely used in large and medium-sized electric equipment such as electric vehicles, electric bicycles, and electric tools. [0003] Because the design of the existing lithium-ion battery itself does not have a protective function, the existing lithium-ion battery adopts the protection circuit board and the lithium-ion battery together, but the protection circuit board is arranged in the lithium-ion battery package. However, because of the external protection circuit board, there will...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a lithium-ion battery with a built-in protection board, which solves the problems of increased cost, reduced service life of the circuit board, and the service life and time of use of the lithium-ion battery due to the external protection of the circuit board. The problem of reduced security

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