Circular high-power lithium ion battery structure and preparation method thereof

A lithium-ion battery, high-power technology, applied in the manufacture of electrolyte batteries, secondary batteries, structural parts, etc., can solve the problems of heating, short life, and insufficient cruising range of lithium-ion batteries, and achieve a reasonable overall structure of the battery. flow capacity, the effect of ensuring reliability

Inactive Publication Date: 2019-06-18
阮孟雪
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Problems solved by technology

[0005] In order to solve the above-mentioned problems of the above-mentioned prior art, the present invention provides an ultra-high-power cylindrical lithium-ion batter...

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  • Circular high-power lithium ion battery structure and preparation method thereof
  • Circular high-power lithium ion battery structure and preparation method thereof
  • Circular high-power lithium ion battery structure and preparation method thereof

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Embodiment Construction

[0053] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0054] see figure 1 - Fig. 6, a kind of lithium-ion battery of the present invention, mainly is the improvement to the positive and negative pole terminal (20,30) lead-out structure of high-power cylindrical lithium-ion battery, the structure of lithium-ion battery of the present invention mainly includes battery case 10. Positive terminal 20 , positive cap 21 , negative terminal 30 , battery cell 40 , and positive insulating sheet 22 .

[0055] Among them, such as figure 1 As shown, the shape of the battery case 10 in this specific embodiment is an integrally formed cylindrical steel case, the outer diameter of the battery case is 18-40mm, the inside of the battery case 10 is hollow, and the battery case 10 The top has an opening, and the bottom of the batte...

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Abstract

The invention relates to a circular high-power lithium ion battery structure and a preparation method thereof. The invention adopts an "all-ear structure" for both positive and negative terminals to store and release the internal energy of the cell, and adopts an "area laser welding" (non-traditional welding of an lithium-ion battery) between the positive and negative terminals and the casing, thus ensuring the effective current (current transfer) capability between the positive and negative terminals of the battery and the casing. In addition, one side of the negative terminal connected to the casing of the battery is provided with a "bump" to shield the slag, which can effectively prevent the slag generated during the laser welding from splashing onto the terminal plane to further protect the reliability of the external connection relationship of the battery. Compared with the conventional cylindrical lithium ion battery, the method provided by the invention does not need to increasethe number of accessories in the implementation, has a reasonable structure and a simple process, and is advantageous for large-scale popularization and application in commercial production.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a circular high-power lithium-ion battery structure and a preparation method thereof. Background technique [0002] As a key core component of the new energy industry, lithium-ion batteries have become a new generation of batteries with high technological content and wide application due to their advantages such as high energy density, no memory effect, long cycle life, and wide voltage range. It is called "the most promising energy storage device". In particular, its energy density can reach more than 300Wh / kg, which will greatly extend the "cruising range" of the energy storage system, further satisfy the balance effect between "cruising range" and "charging time", and improve "greening", The convenience of "smart" travel. At present, the development of lithium-ion batteries is mainly concentrated in China, Japan, and South Korea, especially China. With the stro...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M2/22H01M10/0525H01M10/058H01M50/528
CPCY02E60/10Y02P70/50
Inventor 阮孟雪
Owner 阮孟雪
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