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Cylindrical solid battery

A solid-state battery, cylindrical technology, applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, electrolyte batteries, etc., can solve the problems of volume shrinkage, volume expansion, interface damage, etc., and achieve the effect of maintaining the same volume

Inactive Publication Date: 2019-02-26
TIANJIN LISHEN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It does not really solve the technical problem of "volume expansion of lithium batteries, especially for solid-state batteries, and volume shrinkage during discharge, resulting in interface damage caused by volume changes"

Method used

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  • Cylindrical solid battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A cylindrical solid-state battery (14500), including a cylindrical winding type solid-state lithium ion battery pole group and a cylindrical solid-state battery center pin. The center needle is a cylindrical elastic center needle, which can be used for cylindrical batteries. Its manufacturing material is a highly elastic foam material thermoplastic vulcanizate (TPV), in which the plastic part is nylon and the rubber part is ethylene propylene diene M rubber EPDM. The TPV / EPDM mass ratio is 6:4. The diameter of the cylindrical center pin is 1.5 mm, and the length of the center pin is 46 mm. The center pin of the solid-state lithium-ion battery has a wide range of compression and deformation, and its compression strength is less than the expansion stress inside the solid-state battery, and absorbs the inward volume of the battery cell Expansion is used to construct a breathing solid-state battery cell working mechanism to maintain the internal volume of the battery cell un...

Embodiment 2

[0024] A cylindrical solid-state battery (18650), including a cylindrical winding solid lithium-ion battery pole group and a cylindrical solid-state battery center pin. The cylindrical elastic center needle can be used for cylindrical batteries. Its manufacturing material is a highly elastic foam material thermoplastic vulcanizate (TPV), the plastic part is nylon, and the rubber part is ethylene propylene diene M rubber EPDM. The mass ratio of TPV / EPDM is 6.5:3.5. The cylindrical center needle has a diameter of 2 mm and a center needle length of 61 mm. The center needle of the solid-state lithium-ion battery has a wide range of compression deformation, and its compression strength is less than the expansion stress inside the solid battery, and absorbs the inward volume of the battery cell Expansion is used to build a breathing solid-state battery cell working mechanism to maintain the internal volume of the battery cell unchanged.

[0025] The center pin of a solid-state lithium...

Embodiment 3

[0029] A cylindrical solid-state battery (21700) includes a cylindrical winding solid-state lithium ion battery pole group and a cylindrical solid-state battery center pin. The cylindrical elastic center needle can be used for cylindrical batteries. Its manufacturing material is a highly elastic foamed thermoplastic vulcanized rubber (TPV), in which the plastic part is nylon, and the rubber part is ethylene propylene diene M rubber EPDM. The mass ratio of TPV / EPDM is 6.5:3.5. The cylindrical center pin has a diameter of 2 mm and a center pin length of 66 mm. The center pin of the solid-state lithium-ion battery has a wide range of compression deformation, and its compression strength is less than the expansion stress inside the solid battery, and absorbs the inward volume of the battery cell Expansion is used to construct a breathing solid-state battery cell working mechanism to maintain the internal volume of the battery cell unchanged. The center pin of a solid-state lithium...

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Abstract

The invention relates to a cylindrical solid battery comprising a cylindrical solid battery polar group body and a cylindrical elastic central pin of a core part of a battery core, wherein the cylindrical solid battery polar group body is composed of a positive electrode, a negative electrode and a solid electrolyte. The cylindrical solid battery is characterized in that the cylindrical battery isa cylindrical solid battery, and the cylindrical central pin is a cylindrical elastic center pin made of an elastic foam material, and the cylindrical elastic central pin and a battery polar group constitute a complementary breathing battery core working mode with volume expansion and contraction. The cylindrical solid battery has the beneficial effects that the cylindrical solid battery adopts the cylindrical central pin; the central pin has a wide compression deformation range, has the compression strength less than the expansion stress inside the solid battery, absorbs the inward volume expansion of the battery core, is used for constructing a breathing working mechanism of the battery core, maintains the internal volume of the battery core unchanged, and prevents the deterioration ofthe performance of the battery core caused by the volume change of the battery core.

Description

Technical field [0001] The invention belongs to the field of lithium batteries, and particularly relates to a cylindrical solid-state battery. Background technique [0002] Solid-state batteries, as batteries with intrinsic safety properties, use the chemical inertness and high-strength mechanical characteristics of solid-state electrolytes to inhibit side reactions within the battery, and at the same time, inhibit the formation of lithium dendrites, thereby optimizing and improving the safety of lithium batteries. It provides a solution for the application of lithium metal in lithium-ion batteries. However, solid-state lithium batteries will undergo large volume changes during operation. The rechargeable volume expands and the volume shrinks during discharge. The above-mentioned volume changes can cause interface damage, especially for fixed-type cylindrical solid-state batteries. The volume change caused by the severe deformation of the electrode, thereby degrading the perform...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/058H01M10/42
CPCH01M10/0525H01M10/058H01M10/42Y02E60/10Y02P70/50
Inventor 孟繁慧周江伍绍中
Owner TIANJIN LISHEN BATTERY
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