Lg Energy Solution, Ltd.

Lg Chem, Ltd

Sang Uck Kim

Hyoung Kwon Kim

Jae Woong Kim

Hae Jin Lim

Byung Hun Oh

Cheon Hee Bok

Myung An Lee

Geun Young Park

Yong Han Kim

Da Na Kim

Ik Su Kang

Sang Gu Ji

Min Jung Kim

Je Jun Lee

Sang Sok Jung

Jung Koo Kang

Ha Young Heo

Min Gi Jeong

Han Sol Park

Gil Young Lee

Hayoung Heo

Kyung Ho Nam

Ansoo Jeong

Ro Un Kim

The present invention relates to a secondary battery in which an electrode tab is improved in mechanical strength and a method for manufacturing the same. Also, the secondary battery according to the present invention includes: an electrode provided with a coating portion coated with an active material on an electrode collector and a non-coating portion on which the active material is not applied to the electrode collector, the non-coating portion being adjacent to the coating portion in a width direction perpendicular to a longitudinal direction of the electrode collector, the non-coating portion having a plurality of notching tabs formed therein such that each of the plurality of notching tabs extends away from the coating portion in a width direction. When the electrode assembly is in the wound state, the plurality of notching tabs are circumferentially distributed about a central axis of the electrode assembly.

Secondary battery and method for manufacturing the same

An electrode for a secondary battery may include an electrode collector, a coating portion having an active material coated on the electrode collector, a first non-coating portion on which the active material is not applied to the electrode collector, and a second non-coating portion on which the active material is not applied to the electrode collector. The first non-coating portion may be adjacent to the coating portion in a width direction perpendicular to a longitudinal direction of the electrode collector, the first non-coating portion having a longitudinal dimension extending along the longitudinal direction, the first non-coating portion configured to be bent and electrically coupled to a can member of the secondary battery. The second non-coating portion may be adjacent to the coating portion in the longitudinal direction. The electrode may be stacked into a stack with a separator and a second electrode of an opposite polarity than the electrode.

An electrode assembly including a positive electrode sheet having a positive electrode active material portion that is an area on which a positive electrode active material is stacked on a positive electrode collector and a positive electrode non-coating portion, a positive electrode tab disposed on the positive electrode non-coating portion, a negative electrode sheet having a negative electrode active material portion that is an area on which a negative electrode active material is stacked on a negative electrode collector and a negative electrode non-coating portion; a negative electrode tab disposed on the negative electrode non-coating portion, and a separator insulating the positive electrode sheet and the negative electrode sheet from each other is provided. The positive electrode non-coating portion includes a first positive electrode non-coating portion and a second positive electrode non-coating portion, which are provided on two portions spaced apart from each other on the positive electrode sheet.

Electrode assembly and secondary battery comprising the same

The present invention relates to a secondary battery in which an electrode tab is improved in mechanical strength and a method for manufacturing the same. Also, the secondary battery according to the present invention includes: an electrode provided with a coating portion coated with an active material on an electrode collector and a non-coating portion on which the active material is not applied to the electrode collector in a longitudinal direction of the electrode collector and a notching tab part extending from the coating portion in a width direction of the electrode collector without coating with the active material and overlapping each other to form two or more layers when the electrode is wound.

A battery connector including a conductive plate configured to contact a first battery and a second battery so as to electrically connect the first battery and the second battery to each other, an upper fixer configured to be coupled the first battery, and a lower fixer configured to be coupled to the second battery.

Battery connector for series connection of batteries and battery pack including the same

A cylindrical secondary battery includes a jelly-roll type electrode assembly, a cylindrical battery case for receiving the jelly-roll type electrode assembly, and a cap assembly mounted to the open upper end of the cylindrical battery case. The jelly-roll type electrode assembly includes a long sheet type positive electrode and a long sheet type negative electrode wound with a separator interposed between the positive electrode and the negative electrode. A welding pole is formed on the bottom surface of the cylindrical battery case so as to extend perpendicularly thereto.

Cylindrical secondary battery including welding pole

The present invention relates to an electrode assembly in which resistance is capable of being reduced. Also, an electrode assembly having a wound position and an unwound position includes an electrode having an electrode collector, the electrode collector having a coating portion coated with an active material and a non-coating portion on which the active material is not applied, when the electrode assembly is in the unwound position, the coating portion and the non-coating portion are adjacent to one another in a longitudinal direction of the electrode collector, one or more tab members extending from the non-coating portion, and one or more foil tabs extending from the coating portion in a width direction of the electrode collector perpendicular to the longitudinal direction, the active material not being applied to the foil tabs.

Electrode assembly

The present invention provides a secondary battery including: an electrode assembly ('jelly-roll') having a structure in which a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode are wound together; a can main body inside of which a hollow having an open side is formed and in which the electrode assembly is accommodated in a shape surrounding the hollow; and a top cover mounted on an open upper end portion of the can main body to seal the can main body, wherein one of a bottom portion of the can main body and the top cover may be formed with a through-hole communicating with the hollow of the can main body, and at least 50% of a total volume of the hollow is filled with a thermally conductive resin, and provides a secondary battery pack including the secondary battery.

Cylindrical secondary battery having hollow portion filled with thermal conductive resin

The present invention relates to a secondary battery provided with a multi-tab. The secondary battery includes a jelly-roll in which an electrode and a separator are stacked to cross each other and which is wound around a central core, a plurality of multi-tab parts extending from the electrode and formed on a predetermined area at an end of the jelly-roll, a can member accommodating the jelly-roll, and an insulation member disposed adjacent to the end to insulate the can member from the jelly-roll. The insulation member includes a central hole punched in a center of the insulation member so that the central core passes therethrough and a tab hole punched around the central hole to correspond to the plurality of multi-tab parts so that the plurality of multi-tab parts pass therethrough.

Secondary battery

Disclosed herein is a cap assembly disposed on an open upper end part of a cylindrical can of a battery, the battery being configured to have an electrode assembly mounted in the cylindrical can, the cap assembly including a safety vent configured to rupture in order to exhaust gas when the interior pressure of the battery reaches a predetermined pressure limit, an upwardly-protruding cap plate disposed on the upper part of the safety vent, the cap plate having a through-opening configured to receive the gas exhausted therethrough, a current interrupt member attached to the lower end of the safety vent, the current interrupt member configured to interrupt electric current when the interior pressure of the battery reaches the predetermined pressure limit, and a guide member attached to the inside of the cap plate, the guide member being configured to prevent escape of a ruptured portion of the safety vent.

Cap assembly comprising guide member for preventing escape of safety vent

A secondary battery is disclosed. According to the present invention, in a case in which the secondary battery is ignited, a gas and materials within the secondary battery may be smoothly discharged to improve safety when the secondary battery is ignited. In order to achieve the above-described object, according to an aspect of the present invention, a secondary battery includes: an electrode assembly; a battery can accommodating the electrode assembly; and a coating part applied to the battery can, wherein the battery can includes a slim part having a relatively thinner thickness than that of the other region of the battery can, and the coating part is applied to the slim part and made of a metal material having tensile strength less than that of the slim part.

Disclosed herein is a cylindrical battery cell configured such that an electrode assembly, having a structure in which a positive electrode and a negative electrode are wound in the state in which a separator is interposed between the positive electrode and the negative electrode, is mounted in a cylindrical can in the state of being impregnated with an electrolytic solution, wherein an inner layer and an outer layer, each of which is made of stainless steel, are formed in at least a portion of the cylindrical can, and wherein a reinforcement layer is interposed between the inner layer and the outer layer, the reinforcement layer being made of a different metal than the inner layer and the outer layer.

Cylindrical battery cell including can made of different kinds of metals

The present invention relates to a secondary battery including: a can having an opening in which an electrode assembly and an electrolyte are accommodated; a cap assembly mounted on the opening of the can; and a safety assembly disposed between the electrode assembly and the cap assembly and including a first fire extinguishing member that is configured to be scattered into the electrolyte when the electrode assembly experiences an increase in temperature to suppress the increase in temperature of the electrode assembly.

Growing community of inventors

Daejeon, South Korea

Sang Uck Kim