A lithium-ion battery with high-safety pole pieces and its manufacturing method

A lithium-ion battery, high-safety technology, applied in the manufacture of electrolyte batteries, secondary batteries, final product manufacturing, etc., can solve problems such as inability to perform insulation and limited width of the insulating layer, and reduce the risk of tab breakage , The method is simple and easy to implement, and it is convenient for mass production

Active Publication Date: 2021-12-10
余姚市海泰贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of severe shrinkage of the isolation film, due to the limited width of the insulating layer, it cannot play an insulating role.

Method used

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  • A lithium-ion battery with high-safety pole pieces and its manufacturing method
  • A lithium-ion battery with high-safety pole pieces and its manufacturing method
  • A lithium-ion battery with high-safety pole pieces and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A lithium-ion battery with high-safety pole pieces includes a casing 14 made of aluminum-plastic film. The casing 14 is provided with a bare cell, the bare cell includes a cathode pole piece and an anode pole piece, the cathode pole piece and the anode pole piece are stacked or wound in an alternate manner, and an isolation is provided between the anode pole piece and the cathode pole piece. Membrane 15, the two sides of one end of the anode pole piece or the cathode pole piece with tabs and the two sides of the end opposite to the tabs are provided with several adhesive strips 6, and the adhesive strips 6 are pasted and connected with the adjacent isolation film 15. The cathode pole piece includes a cathode current collector 2, and both sides of the cathode current collector 2 are provided with cathode active material coating strips 1, and the two cathode active material coating strips 1 overlap; the anode pole piece includes an anode current collector 8, and both sides...

Embodiment 2

[0086] The difference from Example 1 is that the length of the strip 6 is 4mm, the length direction of the strip 6 is the same as that of the cathode active material coating strip 1, and the distance between adjacent strips 6 is 2mm.

Embodiment 3

[0088] The difference from Example 1 is that the length of the rubber strips 6 is 6 mm, and the distance between adjacent rubber strips 6 is 3 mm.

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Abstract

The invention discloses a lithium-ion battery with high-safety pole pieces, which includes a shell, and a bare battery core is arranged in the shell, and the bare battery core includes a cathode pole piece and an anode pole piece, and the cathode pole piece The anode pole piece is stacked or wound interlacedly with the anode pole piece and the cathode pole piece is provided with a separator, and the anode pole piece or the cathode pole piece is provided with both sides of one end of the tab and with the tab The two sides of the opposite end are provided with several adhesive strips, and the adhesive strips are pasted and connected with adjacent isolation films. The adhesive strip can solidify quickly at room temperature, melt when the high-temperature fixture is formed, and bond with the isolation film under pressure. The bonding of the separator can prevent the shrinkage of the separator at high temperature and cause the short circuit of the anode and cathode contacts, thereby improving the safety performance of the battery cell. The invention is applied in the field of battery technology.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery with high-safety pole pieces and a manufacturing method thereof. Background technique [0002] With the continuous improvement of energy-saving and environmental protection requirements in various countries around the world, rechargeable lithium-ion batteries will replace traditional nickel-metal hydride batteries and lead-acid batteries, etc., and become the protagonist of chemical power sources, and are widely used in portable electronic products, electric vehicles, Energy storage power station and other fields. At present, the energy density of lithium-ion batteries is getting higher and higher. During use, the risk of thermal runaway caused by lithium-ion batteries being exposed to high temperatures, falling, etc., due to the collapse of the separator film and the short circuit of the anode and cathode contact will also be higher. When charging and di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M50/586H01M10/058H01M10/42H01M50/581
CPCH01M10/0525H01M10/058H01M10/4235H01M50/581Y02E60/10Y02P70/50
Inventor 林珍艳易四勇
Owner 余姚市海泰贸易有限公司
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