Abstract: A battery management system and a driving method thereof are provided for detecting a short battery cell. The battery management system includes a main control unit (MCU) and a cell balancing unit. The MCU transmits a battery cell control signal for controlling charge and discharge of the battery cells. The cell balancing unit balances the battery cells according to the battery cell control signal. The MCU includes a cell balancing discharge amount measurement unit and a controller. The cell balancing discharge amount measurement unit measures a cell balancing discharge amount of each of the battery cells. The controller compares a difference value between a maximum value among the cell balancing discharge amounts of the battery cells and each of the cell balancing discharge amounts to determine a short battery cell.

Abstract: A rechargeable battery according to an exemplary embodiment of the present invention includes an electrode assembly, a case containing the electrode assembly, and a cap assembly. The electrode assembly includes a first electrode, a second electrode, and a separator between the first and second electrodes. The cap assembly is coupled to the case. The cap assembly includes a tab that is electrically connected to the first electrode and a deformable plate that is electrically connected to the second electrode. The deformable plate also includes a notch that is opened due to an increase of pressure. The deformable plate deforms as a result of increased pressure and electrically contacts the first tab, short circuiting the rechargeable battery.

Abstract: A rechargeable battery, which can improve safety, control operating level of a short-circuiting member, prevent external moisture from being induced to a short-circuiting member to cause a short-circuit, and can efficiently utilize an internal space. In an embodiment, the rechargeable battery includes an electrode assembly, a collector plate electrically connected to the electrode assembly, a case housing the electrode assembly and the collector plate, a cap plate sealing the case and having a short-circuiting groove formed at a lower portion thereof, and a short-circuiting member formed between the cap plate and the collector plate, wherein the short-circuiting member is coupled to the short-circuiting groove of the cap plate.

Abstract: A rechargeable battery 100 includes a plurality of electrode assemblies 10; a case 34 housing the electrode assemblies 10; at least one electrode terminal 21, 22, electrically connected to the electrode assemblies 10 by a lead tab 40, 50, the lead tab 50 including a terminal junction part 51; and a prong portion extending from the terminal junction plate, the prong portion comprising a plurality of prongs 53, 54, each of the prongs having a main body 53a electrically connected to one of the electrode assemblies 10 and an angled body 53b bent at one angle from the main body 53a.

Abstract: A battery pack includes a housing having at least one coupling recess, a peripheral portion around the at least one coupling recess, and a plurality of cooling passages extending in at least one direction of the at least one coupling recess and within the peripheral portion, and a battery cell housed in the at least one coupling recess.

Abstract: An electrode terminal and a secondary battery including the same, the electrode terminal including a screw member, the screw member including a flange on a lower outer peripheral surface thereof; and a coupling member including an upper portion bent so as to surround at least a part of the flange, and a lower portion bent so as to contact an internal surface of a cap assembly and coupled to the cap assembly.

Abstract: A battery management system capable of safely disconnecting a charge/discharge current line from a battery pack in an over-charge condition is provided. The battery management system includes a charge/discharge relay including a relay switch coupled to a charge/discharge current path of a battery pack and a driving coil for driving the relay switch, a relay driving unit for controlling the driving coil, a motor control unit (MCU) for controlling the relay driving unit, the MCU being coupled to the relay driving unit, a switching device being coupled between the driving coil and the relay driving unit, and a switching control unit for controlling on/off operations of the switching device to control a current of the relay driving unit.

Abstract: A rechargeable battery according to embodiments of the present invention has improved safety against puncture and collapse. The secondary battery includes an electrode assembly, a case, a first electrode terminal and a second electrode terminal, a cap plate, and a short circuit member. The electrode assembly includes a first electrode, a separator, and a second electrode. The case contains the electrode assembly. The first electrode terminal and a second electrode terminal are electrically connected to the first electrode and the second electrode of the electrode assembly, respectively. The short circuit member extends from the end of one of the first electrode and the second electrode and is wound around the outermost periphery of the electrode assembly to short circuit the electrode assembly when the secondary battery is punctured or collapsed.

Abstract: A battery module includes a plurality of unit batteries each having a terminal electrically connected to a terminal base. The battery module further includes at least one connector including at least one protrusion on a side facing the terminal base of the terminal to electrically couple the terminal of one of the plurality of unit batteries with the terminal of a neighboring one of the plurality of unit batteries. The at least one protrusion may include at least one first protrusion and at least one second protrusion. The at least one first protrusion contacts the terminal base of the one of the plurality of unit batteries and the at least one second protrusion contacts the terminal base of the neighboring one of the plurality of unit batteries.