System for measuring shutdown temperature and meltdown temperature of separator

Patent metadata

Field	Value
Publication number	US-12535361-B2
Application number	US-202117919666-A
Country	US
Kind code	B2
Filing date	Jul 8, 2021
Priority date	Jul 8, 2020
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

The present disclosure relates to a system for determining the shut-down temperature and melt-down temperature of a separator. The system includes a jig having a through-hole, a heating unit, a temperature sensor, a controlling unit and an air permeability-determining unit. In this manner, it is possible to provide a novel system for determining the shut-down temperature and melt-down temperature of a separator by using the air permeability (Gurly value) of the separator.

First claim

What is claimed is:

1 . A system for determining shut-down temperature and melt-down temperature of a separator, comprising:
an air permeability-determining unit determining air permeability (Gurley value) of the separator; a first jig arranged on one side of the separator and having a first through-hole through which air discharged from the air permeability-determining unit is introduced; a second jig arranged on other side of the separator which is an opposite surface of the one side of the separator, and having a second through-hole through which air passing through the first through-hole and pores in the separator is introduced; a heating unit heating the first jig and the second jig; a temperature sensor measuring temperature of the first jig or the second jig; and a controlling unit controlling the heating unit and the temperature sensor, wherein the controlling unit calculates the shut-down temperature and the melt-down temperature of the separator by using the temperature measured by the temperature sensor as a function of time and the air permeability (Gurley value) of the separator determined by the air permeability-determining unit, the heating unit is included in the first jig and the second jig, the heating unit comprises a hot wire, and the hot wire is installed on the other surface where the first jig or the second jig is in contact with the separator.

2 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , wherein the air permeability-determining unit is linked to the first jig, and the controlling unit is linked to the first jig and the second jig.

3 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , wherein the heating unit and the temperature sensor are linked to at least one of the first jig or the second jig.

4 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , wherein the separator is interposed between the first jig and the second jig.

5 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , further comprising a display unit displaying the temperature in X axis as the function of time and the air permeability (Gurley value) of the separator in Y axis as the function of time.

6 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , wherein the shut-down temperature is a temperature corresponding to the air permeability (Gurley value) of 100,000 sec/100 cc, when the temperature is increased as the function of time.

7 . The system for determining the shut-down temperature and melt-down temperature of a separator according to claim 1 , wherein the melt-down temperature is a temperature at a point where the air permeability (Gurley value) of the separator starts to be decreased from 100,000 sec/100 cc after the shut-down temperature has been reached, and the temperature is still increasing.

8 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , wherein the first through-hole and the second through-hole have an average diameter of 2-15 mm.

9 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , further comprising a storage unit recording the shut-down temperature and the melt-down temperature of the separator calculated by the controlling unit.

10 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , further comprising a display unit displaying the shut-down temperature and the melt-down temperature of the separator calculated by the controlling unit.

11 . The system for determining shut-down temperature and melt-down temperature of a separator according to claim 1 , wherein the heating unit is electrically connected with the temperature sensor.

Assignees

• Lg Energy Solution Ltd

Inventors

• Bae Won-Sik
• Kwak Sang-Min
• Lee Joo-Sung
• Jeon Yong-Won
• Jeong Eun-Seon

Classifications

• G01N2015/086

  of films, membranes or pellicules · CPC title

• H01M50/491

  Porosity · CPC title

• G01N15/082

  Investigating permeability by forcing a fluid through a sample · CPC title

• G01K5/58 Primary

  the solid body being constrained at more than one point, e.g. rod, plate, diaphragm (G01K5/62 takes precedence) · CPC title

• G01K1/14 Primary

  Supports; Fastening devices; Arrangements for mounting thermometers in particular locations · CPC title