Abstract: A pouch type battery cell is provided. The battery cell includes a negative electrode and a positive electrode that overlap each other while spaced apart from each other. The negative electrode includes a pair of negative terminals that protrude from a first side of opposite ends of the negative electrode. Additionally, the positive electrode includes a pair of positive terminals that protrude from a second side of opposite ends of the positive electrode.

Abstract: A leadtab assembly may include an electrode non-coating portion having a plurality of stacked electrodes collected inside a battery cell, a leadtab for forming an electrical path to the outside of the battery cell, and a bonding portion for mutually bonding the electrode non-coating portion and the leadtab, wherein a cutting prevention portion is elastically deformed by the force applied to the electrode non-coating portion as the electrode is expanded at the bonding point located between the bonding portion and the leadtab.

Abstract: A pouch battery having improved overcharging safety includes a CID interrupting an electrical connection between an electrode assembly and a lead tab when the pouch is expanded. When the pouch is expanded, the CID discharges gas generated inside the pouch to the outside, and at the time of overcharging a secondary battery, the CID interrupts a flow of current introduced into the secondary battery and discharges the gas generated due to the overcharging to the outside of the pouch, thereby reducing an ignition risk and improving the overcharging safety.

Abstract: An overcharge safety device includes a switch electrically connecting a lead tap of a battery cell with a bus bar, and includes a guide member connected with the switch and movable as a pouch of the battery cell swells. As the pouch of the battery cell swells, the guide member moves toward the bus bar to disconnect the switch from the lead tap.

Abstract: A pouch type secondary battery may include an electrode assembly, electrode tabs connected to the electrode assembly, a pouch case to accommodate the electrode assembly and the electrode tabs in a sealed state, and lead tabs extending to the outside by passing through the pouch case in a state of being connected to the electrode tabs, wherein the lead tabs include a bending connection portion provided in the pouch case, and a breaking portion provided on a side of the bending connection portion to have a relatively small cross-sectional area and being broken when an overcurrent is applied or the pouch case expands.

Abstract: A swelling current interrupt device (CID) includes: a battery unit connection terminal configured to be fixed to a pouch; and a lead tab connection terminal configured to be fixed to the pouch and electrically connected to the battery unit connection terminal, wherein any one of the battery unit connection terminal and the lead tab connection terminal is broken by an expansion force of the pouch which is generated when the pouch expands to interrupt the electrical connection between the battery unit connection terminal and the lead tab connection terminal.

Abstract: The present disclosure relates to a battery cell. The battery cell includes: an electrode assembly; a pouch which wraps around the electrode assembly; an electrode tab extended from the electrode assembly; a lead tab attached to the electrode tab; and a current interrupt device which is configured to block reconnection of the lead tab and the electrode tab when the pouch is shrunk to return to an original position after being expanded, while blocking current flow by separating the lead tab and the electrode tab through the expansion of the pouch, when abnormal situation of battery cell occurs.

Abstract: A battery cell includes: an electrode assembly; a pouch case accommodating the electrode assembly therein; and an electrode lead including an outer lead protruding to an outside of the pouch case and an inner lead disposed between the outer lead and the electrode assembly, accommodated in the pouch case, bent plural times in a direction in which it connects the electrode assembly and the outer lead to each other, and cut by expansion force of the pouch case.

Abstract: A battery cell includes: an electrode assembly; a pouch case accommodating the electrode assembly therein; and an electrode lead including an outer lead protruding to an outside of the pouch case and an inner lead disposed between the outer lead and the electrode assembly, accommodated in the pouch case, and cut by expansion force of the pouch case.

Abstract: A system for controlling a battery to extend a driving mileage is provided. The system supplies a high voltage required to drive a motor by connecting a plurality of batteries in series by turning off a battery switching unit during engaged of an accelerator and balances voltage between the plurality of batteries. A voltage deviation is managed by connecting the plurality of batteries in parallel by turning on the battery switching unit when the accelerator is disengaged. The system includes a plurality of battery modules and a battery switching unit configured to connect the plurality of battery modules in parallel when an accelerator is disengaged and connect the plurality of battery modules in series when the accelerator is engaged. A motor driving unit is configured to receive an output by the battery switching unit when the accelerator is engaged.

Abstract: An overcharge safety device includes a switch electrically connecting a lead tap of a battery cell with a bus bar, and includes a guide member connected with the switch and movable as a pouch of the battery cell swells. As the pouch of the battery cell swells, the guide member moves toward the bus bar to disconnect the switch from the lead tap.

Abstract: The present disclosure relates to a battery cell. The battery cell includes: an electrode assembly; a pouch which wraps around the electrode assembly; an electrode tab extended from the electrode assembly; a lead tab attached to the electrode tab; and a current interrupt device which is configured to block reconnection of the lead tab and the electrode tab when the pouch is shrunk to return to an original position after being expanded, while blocking current flow by separating the lead tab and the electrode tab through the expansion of the pouch, when abnormal situation of battery cell occurs.

Abstract: A high voltage battery for vehicles includes an anode tab that is divided into a first part placed near a battery cell and a second part placed near a terminal. A first part extension extends from the first part and is fixed to a lower pouch. A second part extension extends from the second part, comes into contact with the first part extension, and is fixed at an upper end thereof to an upper pouch. An cathode extension extends from a cathode tab and is spaced apart from the upper end of the second part extension. A cushion is interposed between the second part extension and the cathode extension, with a reference level of pressure formed in the cushion.

Abstract: A battery system improving operation reliability of a swelling current interrupt device (CID) is provided. The battery system includes a cooling plate that forms an appearance of a battery in which the swelling CID interrupting a current flow is mounted and includes a swelling aperture formed therein. The swelling aperture induces an expansion of a pouch in which the swelling CID is embedded. Therefore, since the swelling aperture is formed in the cooling plate, improved operation reliability of the swelling CID than a battery system according to related art in which operation reliability was varied based on a thickness of a pouch cell is obtained.

Abstract: A battery cell includes: an electrode assembly; a pouch case accommodating the electrode assembly therein; and an electrode lead including an outer lead protruding to an outside of the pouch case and an inner lead disposed between the outer lead and the electrode assembly, accommodated in the pouch case, bent plural times in a direction in which it connects the electrode assembly and the outer lead to each other, and cut by expansion force of the pouch case.

Abstract: A battery cell is provided that includes an electrode assembly and a pouch case that accommodates the electrode assembly therein. Additionally, an electrode lead including an outer lead that protrudes outside the pouch case is provided and an inner lead is disposed between the outer lead and the electrode assembly, accommodated in the pouch case, and cut by tension applied when the pouch case expands.

Abstract: A battery cell includes: an electrode assembly; a pouch case accommodating the electrode assembly therein; and an electrode lead including an outer lead protruding to an outside of the pouch case and an inner lead disposed between the outer lead and the electrode assembly, accommodated in the pouch case, and cut by expansion force of the pouch case.

Abstract: A battery overcharge protection device includes a pouch having a battery cell packaged therein. An electrode tab extends from an end of the battery cell for allowing flow of electricity therethrough and is composed of first and second electrode tab parts. A breaker is provided in the pouch and connected to the first and second electrode tab parts to separate the first and second electrode tab parts from each other upon expansion of the battery cell.

Abstract: The present invention features a high-capacity anode material for rapidly chargeable and dischargeable lithium secondary batteries, which is composed of Li4Ti5O12 nanoparticles. The Li4Ti5O12 nanoparticles of the present invention exhibit excellent crystallinity and high rate capability compared to those synthesized using a conventional polyol process or solid reaction process by converting Li4Ti5O12, which is a zero-strain insert material spotlighted as an anode active material for lithium secondary batteries, into Li4Ti5O12, having a high crystalline nanostructure using a solvothermal synthesis process without performing additional heat treatment. The present invention also features methods of, and a method of preparing the high-capacity anode materials described herein.

Abstract: A high voltage battery for vehicles includes an electrode tab that is divided into a first part placed near a battery cell and a second part placed near a terminal. A pouch packages the battery cell therein. A housing is packaged in an interior of the pouch together with the battery cell and has an opening. A first part extension and a second part extension extend from the first part and the second part, respectively, that are inserted into the housing through the opening, and that come into contact with each other in the housing. A cushion is inserted in the housing and compresses the first part extension and the second part extension such that the first part extension and the second part extension come into close contact with each other.