Metal shell button type lithium ion battery

A technology of lithium-ion batteries and metal shells, which is applied in the direction of batteries, cylindrical shell batteries/batteries, secondary batteries, etc., can solve the problem that the good sealing of the inner shell and the outer shell cannot be fully guaranteed, and the battery product cannot make full use of the diameter direction space, battery products can not make full use of the axial space and other issues, to achieve the effect of simple structure, improved energy density, and good sealing
CN111682129APending Publication Date: 2020-09-18CHONGQING VDL ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING VDL ELECTRONICS
Publication Date
2020-09-18

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Abstract

The invention relates to the field of lithium batteries, and discloses a metal shell button type lithium ion battery. The battery comprises a metal shell, a battery cell which is arranged in the metalshell, a terminal arranged on the outer side of the metal shell, and an insulating part arranged between the metal shell and the terminal and is insulated and sealed with the metal shell and the terminal respectively; at least one first tab which is electrically connected with the metal shell and has positive polarity or negative polarity is arranged on the battery cell; the battery cell is alsoprovided with at least one second tab which is electrically connected with the terminal and has negative polarity or positive polarity; the metal shell and the terminal are connected with the insulating part in a heat sealing or bonding manner; the metal shell serves as one pole, and the terminal serves as the other pole; the occupied space of the battery structure is small in the axial directionand the radial direction of the battery cell, the energy density of the battery is improved, and the lithium ion battery has the advantages of being simple in structure, high in sealing reliability and high in energy density and meets the efficient production requirement.
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Description

technical field

[0001] The invention relates to the field of lithium batteries, in particular to a metal shell button lithium ion battery. Background technique

[0002] At present, when most battery manufacturers make thin metal shell lithium secondary batteries, the outer shell of the battery cell adopts a circular metal shell, and its structure is divided into three layers: an inner shell, an outer shell, and a sealing ring. Therefore, in the prior art Lithium-ion batteries occupy a lot of space in the radial direction, resulting in that the battery product cannot make full use of the space in the radial direction, so there is a technical problem of low energy density of the battery. The seal between the inner shell and the outer shell adopts an R angle Sealing technology, which relies on compressed plastic sealing rings to achieve sealing. However, the existing technical means are not very accurate in measuring the R angle, so the good sealing between the inner shell and...

Claims

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