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Positive pole piece of lithium-ion battery and lithium-ion battery

A technology of lithium ion battery and positive pole piece, applied in the direction of electrode carrier/current collector, non-aqueous electrolyte battery electrode, secondary battery, etc., can solve the problem of high risk of internal short circuit and achieve the effect of improving safety performance

Inactive Publication Date: 2016-11-16
SUNWODA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing high-power or high-energy lithium-ion batteries are still following the practice of sticking insulating tape on consumer small lithium-ion batteries or not sticking insulating tape at all, and the risk of internal short circuit is very high

Method used

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  • Positive pole piece of lithium-ion battery and lithium-ion battery
  • Positive pole piece of lithium-ion battery and lithium-ion battery
  • Positive pole piece of lithium-ion battery and lithium-ion battery

Examples

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Embodiment Construction

[0021] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] refer to figure 2 , a lithium-ion battery positive pole piece includes a current collector foil 311 , a diaphragm 312 , a tab 315 , an insulating protective layer 313 , and an insulating hot-melt adhesive film 314 . Wherein, the diaphragm 312 is coated on the current collector foil 311; the edge of the diaphragm 312 is pasted with an insulating hot-melt adhesive film 314; the tab 315 is connected to the current collector foil 311, and the current collector The foil 311 is formed by cutting; the cut edge formed by cutting the tab 315 on the current collector foil 311 is located in the covering area of ​​the insulating protection layer 313 . In this embodiment, the current collector foil of the positive pole piece of the lithium-ion battery is the commonly used aluminum foil.

[0023] In the prior art, if the ...

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PUM

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Abstract

The invention relates to the technical field of lithium-ion batteries, and particularly discloses a positive pole piece of the lithium-ion battery and the lithium-ion battery. The positive pole piece of the lithium-ion battery comprises a current collector foil, a membrane, tabs and an insulating protective layer, wherein the membrane coats the current collector foil; the insulating protective layer is pasted on the current collector foil and covers the edge of the membrane; the tabs are arranged on the current collector foil; and a cut edge formed by cutting the tabs on the current collector foil is located in a coverage area of the insulating protective layer. The lithium-ion battery comprises the positive pole piece of the lithium-ion battery disclosed by the invention. An inner short circuit formed by burrs generated when the pole piece is molded and a negative electrode since the burrs puncture an isolating membrane can be effectively prevented; and the safety performance of the lithium-ion battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery positive plate and a lithium ion battery. Background technique [0002] In modern industry and social life, the demand for energy is increasing. As an environmentally friendly energy storage device, lithium-ion batteries have been widely used in energy storage, vehicles, and portable devices due to their advantages such as light weight, large energy storage, high power, and wide temperature range. [0003] The demand for the use of lithium-ion batteries determines the structural design of the battery. High-power or high-energy lithium-ion batteries are often based on the need for series-parallel connection of battery cells, and a multi-core multi-pole design is often adopted in the battery cells. Intermittent Or continuous coating method to make pole piece, cut the pole piece longitudinally and form single or multiple pole lugs by die cutting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/64H01M10/0525
CPCH01M4/13H01M4/64H01M10/0525Y02E60/10
Inventor 王永亮张耀阳松柏
Owner SUNWODA ELECTRONICS
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