Title of Invention: Method and system for evaluating insulation and lithium ion conductivity characteristics of separators for electrochemical devices
technical field
[One]
The present invention relates to a method and system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device reflecting the actual operating state of the electrochemical device.
[2]
This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0126783 on October 14, 2019, and all contents disclosed in the literature of the Korean patent application are incorporated as a part of this specification.
background
[3]
As the price of energy sources increases due to the depletion of fossil fuels and interest in environmental pollution is increased, the demand for eco-friendly alternative energy sources is increasing. In particular, as technology development and demand for mobile devices increase, demand for secondary batteries as an energy source is rapidly increasing. Regarding the shape of the secondary battery, the demand for the pouch-type secondary battery is high in that it can be applied to mobile products such as mobile phones with a thin thickness.
[4]
This pouch-type secondary battery has a structure in which an electrode assembly is embedded in a pouch-type battery case formed of an aluminum laminate sheet. Specifically, in the pouch-type secondary battery, a stack-type or stack-folding-type electrode assembly in which a positive electrode, a separator, and a negative electrode are sequentially stacked is accommodated in the battery case. The positive electrode and the negative electrode are electrically connected to each other by electrode tabs, and the electrode tabs are connected to an electrode lead drawn out. After the electrode assembly to which the electrode tab and the electrode lead are connected is accommodated in a pouch-shaped battery case, electrolyte is injected, and the battery case is sealed with a part of the electrode lead exposed to the outside to assemble a secondary battery.
[5]
Conventionally, in order to evaluate the characteristics of such a separator, insulation and lithium ion conductivity characteristics of the separator itself were measured. Specifically, the dielectric breakdown voltage was measured as a voltage when a current greater than a reference value flows through the separator by sandwiching the separator between the upper jig and the lower jig, and applying a voltage between the two jigs.
[6]
However, with the above-described method, only the characteristics of the separator itself can be measured, and the insulation and lithium ion conductivity characteristics reflecting the charging and discharging characteristics of the electrode assembly in real time cannot be measured. In an electrochemical device including an electrode assembly, changes in volume and temperature are induced during charging and discharging. These volume and temperature changes act as variables affecting the insulation and lithium ion conductivity characteristics of the separator. Therefore, there is a need for a technology capable of confirming the insulation and lithium ion conductivity characteristics of a separator reflecting the actual use conditions of the electrochemical device.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[7]
The present invention was devised to solve the above problems, and an object of the present invention is to provide a method and system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device reflecting the actual operating state of the electrochemical device.
means of solving the problem
[8]
A method for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to the present invention comprises: a measurement target including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and repeatedly performing charging and discharging of the electrochemical device in a state where the electrochemical device positioned to face the measurement object is sandwiched between the upper jig and the lower jig, and the measurement object while charging and discharging the electrochemical device measuring the electrical resistance of
[9]
In one example, the measurement object may include: an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch-type battery case in which the electrode assembly is accommodated.
[10]
In another example, while the method for evaluating the insulation and lithium ion conductivity characteristics of the separator for an electrochemical device is performed, the electrochemical device is repeatedly charged and discharged, and the measurement object is not charged and discharged do it with
[11]
In a specific example, the measurement object and the electrochemical device have the same structure and composition as the positive electrode and the negative electrode.
[12]
For example, the separator of the electrochemical device has a structure including an inorganic layer formed on one side or both sides of a separation membrane distal specimen, and the separation membrane of the measurement target is formed of a separation membrane distal specimen, and a separate inorganic layer is formed on both sides of the specimen. It is an unformed structure.
[13]
In one example, the upper and lower jigs fix a state in which the measurement object and the electrochemical device face each other.
[14]
In another example, the upper and lower jigs press a state in which the measurement object and the electrochemical device face each other.
[15]
In another example, the upper and lower jigs heat at least one of the measurement object and the electrochemical device while the evaluation is in progress.
[16]
For example, the separator is a separator for a lithium secondary battery.
[17]
In addition, the present invention provides a system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device. In one example, a system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device includes a jig unit including a fixing or pressurizing object to be measured; an electrochemical device that repeatedly performs charging and discharging in a state located between the jig parts; a measurement object positioned between the jig parts to face the electrochemical device; and a measurement unit measuring the electrical resistance of the measurement object.
[18]
In a specific example, the measurement object may include an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch-type battery case in which the electrode assembly is accommodated.
[19]
In another example, at least one of the upper and lower jigs has a structure in which a heating member is mounted.
[20]
In a specific example, the system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device further includes a recording unit for recording an electrical resistance value through the measurement unit while the evaluation is in progress.
[21]
In another specific example, the jig unit further includes at least one of a temperature sensor for measuring the temperature of the measurement object and a pressure sensor for measuring the pressure of the measurement object.
[22]
For example, the jig unit further includes any one or more of a temperature sensor measuring the temperature of the measurement object and a pressure sensor measuring the pressure of the measurement object, and the recording unit, while the evaluation is in progress, electricity through the measurement unit resistance level; and a value measured by at least one of a temperature sensor and a pressure sensor measuring the pressure of the measurement object.
Effects of the Invention
[23]
The method and system for evaluating the insulation and lithium ion conductivity characteristics of the separator for an electrochemical device according to the present invention reflect the temperature and pressure changes according to the actual operating state of the electrochemical device to evaluate the insulation and lithium ion conductivity characteristics of the separator there is.
Brief description of the drawing
[24]
1 is a schematic diagram illustrating an evaluation target positioned between an upper and a lower jig before performing an evaluation according to a method for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to an embodiment of the present invention.
[25]
2 to 4 are schematic diagrams showing a method or system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to an embodiment of the present invention, respectively.
Modes for carrying out the invention
[26]
Hereinafter, the present invention will be described in detail. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. It should be interpreted as meaning and concept consistent with the technical idea of ​​the present invention based on the principle that it can be defined as
[27]
The present invention discloses a "method for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device" or "system", which means measuring the electrical resistance of a separator impregnated in an electrolyte. The charge mobility of the electrolyte is changed according to the permeability or tortuosity of the separator. Therefore, by measuring the electrical resistance of the separator impregnated in the electrolyte, a change in the shape or characteristics of the separator is checked.
[28]
In the present invention, the terms "upper jig" and "lower jig" are meant to encompass a case in which two arms are positioned to face each other, thereby fixing or pressing a measurement object or the like. In the present invention, it is described as "upper jig" and "lower jig" for convenience of description, and includes a case where the two arms are composed of a 'right jig' and a 'left jig' positioned in the direction opposite to each other in the left and right directions. . Therefore, it is possible to replace the "first jig" and the "second jig" according to the position or direction of the jig.
[29]
[30]
The present invention provides a method for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device. Specifically, the evaluation method may include: a measurement target including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and repeatedly performing charging and discharging of the electrochemical device in a state where the electrochemical device positioned to face the measurement object is sandwiched between the upper jig and the lower jig, and the measurement object while charging and discharging the electrochemical device measuring the electrical resistance of
[31]
In the method for evaluating the insulation and lithium ion conductivity properties of the separator for an electrochemical device according to the present invention, the electrical resistance of the separator is measured by reflecting the physical properties of the separator, such as permeability and tortuosity. When the electrochemical device is charged and discharged in a module or a jig, the pressure state according to swelling is changed. The pressure applied to the electrochemical device is transferred to the separator, and this pressure change affects the physical properties of the separator. In addition, the electrochemical device generates heat during charging and discharging, and this temperature rise also changes the electrical characteristics of the separator.
[32]
In the present invention, the insulation and lithium ion conductivity characteristics of the separator are evaluated in a state where the measurement object and the electrochemical device face each other in a jig. While the evaluation is in progress, the electrochemical device is repeatedly charged and discharged. In the process of charging and discharging the electrochemical device, volume expansion or temperature increase of the device is performed, and the effect is transmitted to the object to be measured. In addition, when the temperature of the battery rises during the charging and discharging process, heat is transferred to the object to be measured. Through this, the method for evaluating the insulation and lithium ion conductivity characteristics of the separator for an electrochemical device according to the present invention has an advantage in that the evaluation proceeds in a state in which an environment suitable for the actual use conditions of the electrochemical device is provided to the measurement target.
[33]
Measurement of insulation and lithium ion conductivity characteristics of a measurement object including a separator may be performed using, for example, electrochemical impedance spectroscopy (EIS) in a high frequency region.
[34]
The measurement object is prepared by laminating a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, and injecting an electrolyte solution while inserting it into a case. In one embodiment, the measurement object may include: an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch-type battery case in which the electrode assembly is accommodated. Furthermore, the measurement object includes a case in which the same structure and shape as the electrochemical device facing the measurement object is assembled. For example, the measurement object may include an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch-type battery case in which the electrode assembly is accommodated, wherein the electrolyte is injected into the battery case.
[35]
In another embodiment, while the method for evaluating the insulation and lithium ion conductivity properties of the separator for an electrochemical device is performed, the electrochemical device repeatedly performs charging and discharging, and the measurement object does not perform charging and discharging . That is, the electrochemical device is repeatedly charged and discharged to form actual use conditions for the electrochemical device, and the measurement target evaluates insulation and lithium ion conductivity characteristics of the separator. When charging/discharging is performed on the measurement object, an electrochemical shock may be applied to the measurement object during the charging/discharging process. Such an electrochemical shock acts as another variable in evaluating the insulation and lithium ion conductivity characteristics of the separator, and changes in the state of the electrode active material layer or electrolyte affect the evaluation result.
[36]
In one embodiment, the structure and composition of the positive electrode and the negative electrode of the measurement object and the electrochemical device are the same. That is, in a state where two identical electrochemical devices are prepared, one electrochemical device serves to realize actual use conditions, and the other electrochemical device is a measurement object that evaluates the insulation and lithium ion conductivity characteristics of the separator becomes
[37]
In another embodiment, the separator of the electrochemical device has a structure including an inorganic layer formed on one or both surfaces of the separator fabric specimen, and the separator of the object to be measured is formed of a separator fabric specimen, but on both sides of the specimen separately of the structure in which the inorganic layer is not formed. Depending on the type of separator, an inorganic layer may be formed on one or both surfaces of the original fabric of the separator in order to improve the physical properties of the separator. In this case, the inorganic layer formed on the surface of the separator may impart insulating properties to the separator, which may reflect the insulating properties of the inorganic layer, not the insulating properties of the original fabric itself, in the evaluation result. Therefore, when the separator to be evaluated includes an inorganic layer on one or both sides of the separator fabric specimen, it is better to remove the inorganic layer from the separator fabric specimen or to perform the evaluation using a separator fabric in which an inorganic layer is not formed. .
[38]
In the present invention, the evaluation is performed while the measurement object and the electrochemical device are placed between the upper and lower jigs. The role of the upper and lower jigs is to fix the positions of the measurement object and the electrochemical device, and support so that the pressure change according to the volume change generated when the electrochemical device is subjected to a volume change in the charging/discharging process is transmitted to the measurement object plays a role Accordingly, the upper and lower jigs serve to fix a state in which the measurement object and the electrochemical device face each other.
[39]
In another embodiment, the upper and lower jigs press the measurement object and the electrochemical device facing each other. Pressing the measurement object using the upper and lower jigs is to shorten the evaluation time by forming harsh conditions on the measurement object.
[40]
In another embodiment, the upper and lower jigs heat at least one of the measurement object and the electrochemical device while the evaluation is in progress. Heating the measurement object using the upper and lower jigs is to shorten the evaluation time by forming harsh conditions on the measurement object.
[41]
The method for evaluating insulation and lithium ion conductivity characteristics of a separator according to the present invention is applicable to various types of separators for electrochemical devices. For example, the separator is a separator for a lithium secondary battery.
[42]
[43]
In addition, the present invention provides a system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device. The evaluation system is for applying the method for evaluating the insulation and lithium ion conductivity characteristics of the separator for an electrochemical device described above, and overlapping descriptions will be omitted.
[44]
In one embodiment, the evaluation system includes a jig unit for fixing or pressing the measurement object; an electrochemical device that repeatedly performs charging and discharging in a state located between the jig parts; a measurement object positioned between the jig parts to face the electrochemical device; and a measurement unit measuring the electrical resistance of the measurement object.
[45]
The evaluation system for the insulation and lithium ion conductivity characteristics of the separator for an electrochemical device according to the present invention is evaluated in a state that an environment suitable for the actual use conditions of the electrochemical device is given to the measurement target, and, if necessary, measured through a jig part It is also possible to shorten the evaluation time by pressing the object.
[46]
In one embodiment, the measurement object of the evaluation system according to the present invention, an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch-type battery case in which the electrode assembly is accommodated.
[47]
In another embodiment, at least one of the upper and lower jigs has a structure in which a heating member is mounted. Through the heating member, it is possible to shorten the evaluation time of the evaluation system according to the present invention.
[48]
In another embodiment, the evaluation system according to the present invention further includes a recording unit for recording the electrical resistance value through the measuring unit while the evaluation is in progress.
[49]
In one embodiment, the jig unit further includes any one or more of a temperature sensor for measuring the temperature of the measurement object and a pressure sensor for measuring the pressure of the measurement object.
[50]
For example, the jig unit further includes any one or more of a temperature sensor measuring the temperature of the measurement object and a pressure sensor measuring the pressure of the measurement object, and the recording unit, while the evaluation is in progress, electricity through the measurement unit resistance level; and a value measured by at least one of a temperature sensor and a pressure sensor measuring the pressure of the measurement object.
[51]
[52]
The method and system for evaluating insulation and lithium ion conductivity properties of a separator according to the present invention according to the present invention can be applied to various types of separators for electrochemical devices. For example, the separator is a separator for a lithium secondary battery.
[53]
The lithium secondary battery may include, for example, an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; a non-aqueous electrolyte for impregnating the electrode assembly; and a battery case containing the electrode assembly and the non-aqueous electrolyte.
[54]
The positive electrode has a structure in which a positive electrode active material layer is laminated on one or both surfaces of a positive electrode current collector. The positive active material may be each independently a lithium-containing oxide, and may be the same or different. As the lithium-containing oxide, a lithium-containing transition metal oxide may be used. In one example, the positive active material layer includes a conductive material and a binder polymer in addition to the positive active material, and if necessary, may further include a positive electrode additive commonly used in the art.
[55]
The current collector used for the positive electrode is a metal with high conductivity, and any metal that can be easily adhered to the positive electrode active material slurry and has no reactivity in the voltage range of the electrochemical device may be used. Specifically, non-limiting examples of the current collector for the positive electrode include a foil made of aluminum, nickel, or a combination thereof.
[56]
The negative electrode may include a carbon material, lithium metal, silicon or tin as an anode active material. When a carbon material is used as the negative electrode active material, both low crystalline carbon and high crystalline carbon may be used. Soft carbon and hard carbon are representative of low crystalline carbon, and natural graphite, Kish graphite, pyrolytic carbon, and liquid crystal pitch-based carbon fiber are representative of high crystalline carbon. (mesophase pitch based carbon fiber), carbon microspheres (mesocarbon microbeads), liquid crystal pitches (Mesophase pitches), and high-temperature calcined carbon such as petroleum and coal-based cokes (petroleum orcoal tar pitch derived cokes) are representative.
[57]
Non-limiting examples of the current collector used for the negative electrode include a foil made of copper, gold, nickel, or a copper alloy, or a combination thereof. In addition, the current collector may be used by stacking substrates made of the above materials.
[58]
In addition, the negative electrode may include a conductive material and a binder commonly used in the art.
[59]
As the separator, any porous substrate used in lithium secondary batteries may be used, for example, a polyolefin-based porous membrane or a nonwoven fabric may be used, but is not particularly limited thereto.
[60]
Examples of the polyolefin-based porous membrane include polyethylene such as high-density polyethylene, linear low-density polyethylene, low-density polyethylene, and ultra-high molecular weight polyethylene, and polyolefin-based polymers such as polypropylene, polybutylene, and polypentene, respectively, individually or in a mixture thereof. One membrane is mentioned.
[61]
[62]
Hereinafter, the present invention will be described in more detail through examples and the like.
[63]
1 is a schematic diagram illustrating an evaluation target positioned between an upper and a lower jig before performing an evaluation according to a method for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to an embodiment of the present invention. Referring to FIG. 1 , the measurement object 100 and the electrochemical device 200 are positioned to face each other between the upper jig 310 and the lower jig 320 . The measurement object 100 has a form in which an electrode assembly having a structure in which a positive electrode 10 , a separator 20 , and a negative electrode 30 are sequentially stacked is accommodated in a battery case 40 . In addition, the positive electrode 10 and the negative electrode 30 of the measurement object 100 and the positive electrode tab 11 and the negative electrode tab 31 electrically connected to each other are exposed to the outside of the battery case (40).
[64]
[65]
2 to 4 are schematic diagrams showing a method or system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to an embodiment of the present invention, respectively. Hereinafter, each case will be described.
[66]
[67]
[First embodiment]
[68]
2 is a schematic diagram illustrating a method or system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to an embodiment of the present invention. Referring to FIG. 2 , the measurement object 110 and the electrochemical device 200 are positioned between the upper jig 310 and the lower jig 320 in a state where they face each other. The measurement object 110 has a structure in which an anode 10, a separator 20, and a cathode 30 are sequentially stacked. In addition, the positive electrode tab 11 and the negative electrode tab 31 electrically connected to the positive electrode 10 and the negative electrode 30 of the measurement object 100, respectively, protrude. The measuring device 400 measures insulation and lithium ion conductivity characteristics of the measurement object 110 in a state in which the positive electrode tab 11 and the negative electrode tab 31 are connected. The measuring device 400 uses an Electrochemical Impedance Spectroscopy (EIS) in a high frequency region.
[69]
In addition, the electrochemical device 200 is positioned under the measurement object 110 . The electrochemical device 200 repeats the charging/discharging process through the connected power source 500 . The volume and temperature changes induced while the electrochemical device 200 is charging and discharging are transmitted to the measuring object 110 facing it. The power source 500 performs charging of the electrochemical device 200 , but also induces discharging of the electrochemical device 200 by including a resistor as necessary.
[70]
[71]
[Second embodiment]
[72]
3 is a schematic diagram illustrating a method or system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to an embodiment of the present invention. Referring to FIG. 3 , the measurement object 120 and the electrochemical device 200 are positioned between the upper jig 310 and the lower jig 320 in a state where they face each other. The measurement object 120 and the electrochemical device 200 have a form in which an electrode assembly having a structure in which a positive electrode 10 , a separator 20 , and a negative electrode 30 are sequentially stacked is accommodated in a battery case 40 .
[73]
The measuring device 400 measures insulation and lithium ion conductivity characteristics of the measurement object 120 in a state in which it is connected to the positive electrode tab and the negative electrode tab of the measurement object 120 . The measuring device 400 uses an Electrochemical Impedance Spectroscopy (EIS) in a high frequency region. In addition, the electrochemical device 200 repeats the charging/discharging process through the connected power source 500 .
[74]
[75]
[Third embodiment]
[76]
4 is a schematic diagram illustrating a method or system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to an embodiment of the present invention. Referring to FIG. 4 , the measurement object 130 and the electrochemical device 200 are positioned between the upper jig 310 and the lower jig 320 in a state where they face each other. The measurement object 130 and the electrochemical device 200 have a form in which an electrode assembly having a structure in which a positive electrode 10 , a separator 20 , and a negative electrode 30 are sequentially stacked is accommodated in a battery case 40 .
[77]
The measurement object 130 and the electrochemical device 200 were positioned so that the positive electrode tab and the negative electrode tab protrude in different directions. Through this, a space was secured for the connection between the measurement object 13 and the measuring device 400 , and for the connection between the electrochemical device 200 and the power source 500 .
[78]
Specifically, the measuring device 400 measures insulation and lithium ion conductivity characteristics of the measurement object 130 in a state in which it is connected to the positive electrode tab and the negative electrode tab of the measurement object 120 . The measuring device 400 uses an Electrochemical Impedance Spectroscopy (EIS) in a high frequency region. In addition, the electrochemical device 200 repeats the charging/discharging process through the connected power source 500 .
[79]
Above, the present invention has been described in more detail with reference to the drawings and examples. However, the configurations described in the drawings and embodiments described in this specification are only one embodiment of the present invention and do not represent all of the technical spirit of the present invention, so at the time of the present application, various equivalents and It should be understood that there may be variations.
[80]

[81]
10: positive
[82]
11: positive tab
[83]
20: separator
[84]
30: cathode
[85]
31: negative electrode tab
[86]
40: battery case
[87]
100, 110, 120, 130: measurement object
[88]
200: electrochemical device
[89]
310: upper jig
[90]
320: lower jig
[91]
400: measuring instrument
[92]
500: power
Claims
[Claim 1]
a measurement object comprising a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and repeatedly performing charging and discharging of the electrochemical device in a state where the electrochemical device positioned to face the measurement object is sandwiched between the upper jig and the lower jig, and the measurement object while charging and discharging the electrochemical device A method for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device, comprising measuring the electrical resistance of
[Claim 2]
The method of claim 1, wherein the measurement object comprises: an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch-type battery case in which the electrode assembly is accommodated.
[Claim 3]
The method according to claim 1, wherein, while the method for evaluating the insulation and lithium ion conductivity characteristics of the separator for an electrochemical device is performed, the electrochemical device repeatedly performs charging and discharging, and the measurement object does not perform charging and discharging. A method for evaluating insulation and lithium ion conductivity characteristics of separators for electrochemical devices.
[Claim 4]
[2] The method of claim 1, wherein the measurement object and the electrochemical device have the same structure and composition as the positive electrode and the negative electrode.
[Claim 5]
According to claim 1, wherein the separation membrane of the electrochemical device has a structure including an inorganic layer formed on one or both surfaces of the separation membrane distal end specimen, and the separation membrane of the measurement target is formed of a separation membrane distal end specimen, and a separate inorganic layer is formed on both sides of the specimen. A method for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device, characterized in that it has a structure in which a layer is not formed.
[Claim 6]
The method of claim 1, wherein the upper and lower jigs fix the state in which the measurement object and the electrochemical device face each other.
[Claim 7]
The method according to claim 1, wherein the upper and lower jigs pressurize a state in which the measurement object and the electrochemical device face each other.
[Claim 8]
According to claim 1, wherein the upper and lower jig, while the evaluation is in progress, the insulation and lithium ion conductivity characteristics evaluation of the separator for an electrochemical device, characterized in that at least one of the measurement object and the electrochemical device is heated method.
[Claim 9]
The method according to claim 1, wherein the separator is a separator for a lithium secondary battery.
[Claim 10]
A jig unit including fixing or pressing the measurement object; an electrochemical device that repeatedly performs charging and discharging in a state located between the jig parts; a measurement object positioned between the jig parts to face the electrochemical device; And Insulation and lithium ion conductivity characteristic evaluation system of the separator for an electrochemical device comprising a measuring unit for measuring the electrical resistance of the measurement object.
[Claim 11]
11. The method of claim 10, wherein the measurement object comprises: an electrode assembly comprising a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch-type battery case in which the electrode assembly is accommodated.
[Claim 12]
11. The system of claim 10, wherein at least one of the upper and lower jigs has a structure in which a heating member is mounted.
[Claim 13]
The system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device according to claim 10, further comprising a recording unit for recording the electrical resistance value through the measuring unit while the evaluation is in progress.
[Claim 14]
The insulation and Lithium Ion Conductivity Characteristics Evaluation System.
[Claim 15]
The method of claim 13, wherein the jig unit further comprises any one or more of a temperature sensor for measuring the temperature of the measurement object and a pressure sensor for measuring the pressure of the measurement object, and the recording unit, while the evaluation is in progress, the measurement unit through electrical resistance; And Insulation and lithium ion conductivity characteristic evaluation system of the separator for an electrochemical device, characterized in that the temperature sensor and the pressure sensor for measuring the pressure of the measurement object to record the measured value through any one or more.