Lg Energy Solution, Ltd.

Soon Ju Choi

Eun Ju Lee

Seok Koo Kim

Ji Hoon Ryu

Ji Eun Lee

Dae Soo Kim

Young Deok Kim

Hyun Jun Choi

A secondary battery according to an embodiment of the present disclosure may include an electrode assembly and a pouch-type batter. The battery case may include a cup part to accommodate electrode assembly. A sealing part may extend outward from an edge of the cup part and may be sealed. A venting device may be inserted into the sealing part through which a gas inside the cup part may be discharged to the outside. The sealing part may include a vent sealing portion into which the venting device may be inserted, and a weak sealing portion which may be positioned between the vent sealing portion and the cup part and sealed more weakly than the periphery thereof.

Secondary battery and sealing block

The present invention relates to a battery cell including an electrolyte ion concentration measurement unit and a method for measuring an electrolyte concentration using same. The battery cell according to the present invention comprises a measurement unit in which a first electrode plate, an insulation film, and a second electrode plate are sequentially stacked on one another, wherein the measurement unit is inserted between a separator of the battery cell and an electrode thereof, and thus can directly measure an electrolyte concentration between the separator and the electrode. Therefore, the battery cell can be simply manufactured and has excellent stability. In addition, according to the present invention, the method for measuring an electrolyte concentration of a secondary battery using the battery cell enables measurement of electrolyte concentration in real time even during the use of the battery and can measure an electrolyte concentration of the separator more accurately and quickly than a conventional technology.

Battery cell including electrolyte ion concentration measurement unit and method for measuring electrolyte concentration using same

The present invention relates to a method and system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device, in which insulation and lithium ion conductivity characteristics are evaluated while a separator-containing measurement object to be tested and an electrochemical device are made to face each other, and thus, the insulation and lithium ion conductivity characteristics of the separator can be evaluated by reflecting temperature and pressure changes and the like according to the actual operation state of the electrochemical device.

Method and system for evaluating insulation and lithium ion conductivity characteristics of separator for electrochemical device

The present invention relates to a method for manufacturing a secondary battery and a secondary battery. The method for manufacturing the secondary battery comprises an accommodation step of accommodating an electrode assembly in an accommodation part of a battery case, a vent membrane mounting step of mounting a vent membrane on a discharge hole, which passes between the inside and outside of the battery case, in the battery case, and a case sealing step of sealing the battery case, wherein the vent membrane allows only a gas to pass through the discharge hole of the battery case, but blocks a liquid.

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Daejeon, South Korea

Soon Ju Choi