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Lithium-ion battery separator

A lithium-ion battery and separator technology, which is applied in battery pack parts, circuits, separators/films/diaphragms/spacers, etc., can solve problems such as complicated processes, and achieve excellent liquid absorption and efficiency. Effect

Active Publication Date: 2017-10-03
MITSUBISHI PAPER MILLS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the roughening of the surface of the separator is performed by rubbing, so there is a problem that the process becomes complicated.

Method used

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  • Lithium-ion battery separator
  • Lithium-ion battery separator

Examples

Experimental program
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Effect test

Embodiment 1

[0104] On one side of the non-woven fabric substrate A, the coating solution A was coated with a gravure coater (KRG) of the reverse contact (Kiss Reverse) method and dried so that the absolute dry coating amount became 16g / m 2 Thus, a separator with a thickness of 36 μm was produced. The angle 4 between the injection direction and the tank is +40°.

Embodiment 2

[0106] On one side of the non-woven fabric substrate A, the coating solution A was coated with a reverse contact gravure coater and dried so that the absolute dry coating amount became 16g / m 2 Thus, a separator with a thickness of 36 μm was produced. The angle 4 between the injection direction and the tank is +70°.

Embodiment 3

[0108] On one side of the non-woven fabric substrate A, the coating solution A was coated with a reverse contact gravure coater and dried so that the absolute dry coating amount became 16g / m 2 Thus, a separator with a thickness of 36 μm was produced. The angle 4 between the injection direction and the tank is +15°.

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Abstract

The present invention is a lithium-ion battery separator which includes a non-woven substrate and an inorganic pigment which is imparted to the non-woven substrate. The surface of the surface of the inorganic pigment is provided with a groove. The separator is preferably configured that the injection direction of an electrolyte is defined by the lithium-ion battery which contains the lithium-ion battery separator to intersect with the groove at a -70-+70 DEG. Therefore, the invention provides a separator which can be produced without using complex working steps, can better absorb the electrolyte and makes injection more efficient upon manufacturing batteries by using the separator.

Description

Technical field [0001] The invention relates to a lithium ion battery separator. Background technique [0002] In lithium ion batteries (hereinafter sometimes referred to as "batteries"), in order to prevent contact between the plates, lithium ion battery separators are used (hereinafter sometimes referred to as "separators"). [0003] The lithium ion battery is manufactured through the following process. First, an assembly such as a wound body obtained by overlapping the positive electrode, the negative electrode, and the separator, or a laminate obtained by stacking the positive electrode, the negative electrode, and the separator, is inserted into an outer package. Then, after closing the opening of the outer package, the electrolyte is filled from the liquid injection port. Finally, seal the injection port. [0004] For the injection of the electrolyte, the electrolyte must be permeated to the entire assembly composed of the positive electrode, the negative electrode, and the ...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M2/18
CPCH01M50/431H01M50/463Y02E60/10
Inventor 三枝秀彰增田敬生
Owner MITSUBISHI PAPER MILLS LTD
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