Abstract: A motor torque control method for a motor-driven vehicle is carried out when a vehicle reduces its speed to a low speed or is in a stopped state, gear backlash and torsion of a drivetrain are minimized, and thus impact on the drivetrain which may occur during starting or restarting of a vehicle is minimized. The motor control method includes determining whether vehicle speed is in a speed reducing state less than a set vehicle speed or in a stopped state; determining a required torque command, an anti-jerk torque, and an additional drivetrain arrangement torque for removing drivetrain backlash based on vehicle operation state information when the speed reducing state or the stopped state is determined; and determining a motor torque command by using the required torque command, the anti-jerk torque, and the drivetrain arrangement torque.

Abstract: A motor torque control method for a motor-driven vehicle is carried out when a vehicle reduces its speed to a low speed or is in a stopped state, gear backlash and torsion of a drivetrain are minimized, and thus impact on the drivetrain which may occur during starting or restarting of a vehicle is minimized. The motor control method includes determining whether vehicle speed is in a speed reducing state less than a set vehicle speed or in a stopped state; determining a required torque command, an anti-jerk torque, and an additional drivetrain arrangement torque for removing drivetrain backlash based on vehicle operation state information when the speed reducing state or the stopped state is determined; and determining a motor torque command by using the required torque command, the anti-jerk torque, and the drivetrain arrangement torque.

Abstract: A system and method for calculating available energy of a battery is provided and the system includes a controller configured to receive State-Of-Charge (SOC) of the battery as an input and output an Open-Circuit Voltage (OCV) of the battery. In addition, a value of available energy is stored in a memory and the controller obtains a value of charged and discharged energy and a value of heat loss energy from an OCV of the battery, an output voltage of a battery system, and an output current of the battery system. The value of the obtained charged and discharged energy are added to the value of the available energy which has been previously stored and the value of the heat loss energy is subtracted to calculate a value of new available energy.

Abstract: Disclosed is a system and method for computing distance to empty (DTE) based on available energy computed using a battery SOC vs open circuit voltage (OCV) table, battery temperature vs energy efficiency, an energy efficiency vs energy table, etc., to enable a more accurate calculation of the DTE in consideration of the temperature of the battery, which is one of disturbance elements.

Abstract: A secondary battery includes a case having positive and negative electrodes, a safety device attached to a surface of the case and having a resistance value which changes during swelling of the case, and a protective circuit module attached to a side of the case while being electrically connected to the safety device. The resistance value of the safety device changes as the case swells, and the protective circuit module reduces or interrupts charging/discharging currents in response thereto. The safety device can be used for all secondary batteries regardless of capacity, can quickly react against abruptly rising internal temperature and rapid swelling, and can stably prevent swelling which occurs above an allowable temperature.

Abstract: Disclosed is a system and method for computing distance to empty (DTE) based on available energy computed using a battery SOC vs open circuit voltage (OCV) table, battery temperature vs energy efficiency, an energy efficiency vs energy table, etc., to enable a more accurate calculation of the DTE in consideration of the temperature of the battery, which is one of disturbance elements.

Abstract: A secondary battery having a simplified structure by which a lead of a safety device can be adhered to the battery includes an electrode unit having a positive electrode plate, a negative electrode plate and a separator disposed therebetween, a can having a bottom portion and made of aluminum or an aluminum alloy, the can in which the electrode unit and an electrolytic solution are accommodated and sealed, and a surface coating provided on at least an outer surface of the bottom portion of the can to which the lead is attached.

Abstract: A lithium ion secondary battery has a shape memory safety vent adapted to discharge internal compressed gas by temporarily being opened when the temperature reaches a predetermined level to avoid a swelling phenomenon of the battery and improve safety. The lithium ion secondary battery includes an electrode assembly having first and second electrode plates wound a number of times with a separator interposed between them; a can having an opening formed on a side thereof to contain the electrode assembly; and a cap plate adapted to cover the can and provided with a vent hole on a side thereof, to which a safety vent adapted to deform at a predetermined temperature and discharge gas from inside the can to the exterior is coupled.

Abstract: An electrode assembly is adapted to prevent the separator from contracting due to heat that is generated near the electrode tab during overcharging, over-discharging, or in the case of an internal short circuit. The electrode assembly also prevents an additional short circuit between the electrode plates. A rechargeable battery that comprises the electrode assembly is also provided. The present invention prevents the electrode tab from being short-circuited due to increased heat generation during overcharging or in the case of a short circuit, thus improving the safety of the rechargeable battery.

Abstract: A lithium secondary battery includes an electrode assembly having first and second electrodes wound together with a separator interposed between them and an insulation case positioned on the electrode assembly. The insulation case is made of a resin or resin composite material having a tensile strength of at least 500 kg/cm2.

Abstract: A rechargeable battery including a bare cell with an electrode assembly having two electrodes and a separator, a case for storing the electrode assembly, a cap plate for covering an opening of the case, and a protection circuit module coupled with the cap assembly. A portion of the lower surface of the protection circuit module is formed of a synthetic resin, and contacts a region of the cap plate also formed of a synthetic resin. The protection circuit module and the cap plate an be coupled together by adhesion, welding or melting.

Abstract: A cylindrical lithium ion battery and a method of manufacturing the same. A center pin is easily inserted into a space within an electrode assembly to retain and support it on the interior of a cylindrical can. The cylindrical lithium ion battery includes an electrode assembly wound in a cylindrical shape with the space defined at the center thereof, a cylindrical can containing the electrode assembly and having an open top, a center pin located within the space of the electrode assembly and having a diameter which is small upon insertion and becomes larger after insertion to fill in the space, a cap assembly attached to the top of the cylindrical can to prevent the electrode assembly and the center pin from escaping the can.

Abstract: A secondary battery includes a case having positive and negative electrodes, a safety device attached to a surface of the case and having a resistance value which changes during swelling of the case, and a protective circuit module attached to a side of the case while being electrically connected to the safety device. The resistance value of the safety device changes as the case swells, and the protective circuit module reduces or interrupts charging/discharging currents in response thereto. The safety device can be used for all secondary batteries regardless of capacity, can quickly react against abruptly rising internal temperature and rapid swelling, and can stably prevent swelling which occurs above an allowable temperature.

Abstract: A secondary battery having a simplified structure by which a lead of a safety device can be adhered to the battery includes an electrode unit having a positive electrode plate, a negative electrode plate and a separator disposed therebetween, a can having a bottom portion and made of aluminum or an aluminum alloy, the can in which the electrode unit and an electrolytic solution are accommodated and sealed, and a surface coating provided on at least an outer surface of the bottom portion of the can to which the lead is attached.

Abstract: The present invention provides a lithium secondary battery comprising a cathode electrode containing a lithium complex oxide; an anode electrode containing metal lithium or its alloy, or carbon material; and a nonaqueous organic electrolyte containing a nonaqueous organic solvent, a lithium salt and an aromatic ether that can react to form dimers or polymers above a certain temperature and voltage and that can be expressed by Formula 1 below: wherein, R1 is independently a single bond or an alkylene group with less than or equal to 2 carbons and R2 is hydrogen or an alkyl group with less than or equal to 2 carbons. The lithium secondary battery has the advantage that its characteristics are maintained, even if it is left in its fully charged state at a high temperature for a long time and, at the same time, its reliability and stability have been improved.

Abstract: The present invention provides a lithium secondary battery comprising a cathode electrode containing a lithium complex oxide; an anode electrode containing metal lithium or its alloy, or carbon material; and a nonaquaeous organic electrolyte containing a nonaquaeous organic solvent, a lithium salt and an aromatic ether that can react to form dimers or polymers above a certain temperature and voltage and that can be expressed by Formula 1 below.

Abstract: A cap assembly of a battery, comprising: a cap plate for covering the upper portion of a battery case; a positive terminal installed on the cap plate, insulated from the cap plate; a rivet member having a rivet protrusion, through which a vent hole is formed, inserted through holes formed in the cap plate and the positive terminal for riveting them together, the rivet member electrically connected to the positive terminal; a safety member installed at the lower end of rivet member, blocking the vent hole; and a positive tap fixing member attached to the lower end of the safety member and joined to a positive tap of an electrode assembly in the battery case, wherein the safety member is ruptured and separated from the positive tap fixing member by an internal pressure increase of the battery case.

Abstract: Disclosed is a system and method for computing distance to empty (DTE) based on available energy computed using a battery SOC vs open circuit voltage (OCV) table, battery temperature vs energy efficiency, an energy efficiency vs energy table, etc., to enable a more accurate calculation of the DTE in consideration of the temperature of the battery, which is one of disturbance elements.