A pouch-type battery cell includes a battery case including a metal layer and polymer resin layer, and an electrode assembly disposed within the battery case, the battery case further including an electrode assembly receiving part formed in at least one of an upper case and a lower case of the battery case, and a venting member disposed on an outer surface of the electrode assembly receiving part at a location adjacent to a sealing part of the battery case, wherein the venting member is made of a shape memory alloy that is deformed to penetrate the battery case when a temperature of the venting member increases to a value above a transition temperature of the shape memory alloy. A battery module including the pouch-type battery cell, and a battery pack are also provided

An apparatus and method for measuring temperature of a battery, which may effectively measure a temperature of a secondary battery. The apparatus measures a temperature of a secondary battery at an integrated circuit board configured to contact an electrode lead of the secondary battery, and includes a lead connector mounted on the integrated circuit board and configured such that the electrode lead is connected thereto, a temperature sensor mounted on the integrated circuit board and configured to receive an operation power from the secondary battery as a first terminal provided at one end thereof among a plurality of terminals included therein is in direct contact with the lead connector, and a calculating unit electrically connected to the temperature sensor and configured to measure the temperature of the secondary battery based on an electric signal measured by the temperature sensor.

A safety detection method for a battery module is provided in this application, which includes: obtaining a plurality of battery temperatures detected by the plurality of temperature sensors at a first moment; determining a standard battery temperature based on the plurality of battery temperatures; obtaining a second battery temperature of a first battery set at a second moment; determining a temperature change rate of first battery set based on a first battery temperature, a second battery temperature, the first moment, and the second moment; and determining that a battery in the first battery set has a liquid leakage risk when a third difference between the first battery temperature detected by the first temperature sensor at the first moment and the standard battery temperature is greater than a first temperature threshold, and the temperature change rate is greater than a temperature change rate threshold.

Embodiments described herein relate to current interrupt devices (CIDs) for electrochemical cells that use a thermal trigger (e.g., shape memory and/or bi-metallic materials) to open an electrical circuit just prior to a thermal runaway or during short-circuit event to prevent catastrophic failure of the electrochemical cell. Embodiments include CIDs comprising a housing, a bus bar coupled to the housing, and a thermal trigger operably coupled to the bus bar. In some embodiments, the bus bar can include an engineered fracture site. In some embodiments, the thermal trigger is dimensioned and configured to deform at a predetermined temperature to break the bus bar at the engineered fracture site. In some embodiments, a portion of the bus bar travels about a hinge, opening the electrical circuit and preventing overcharging, thermal runaway, and/or other catastrophic failure events.

A battery pack includes: a plurality of unit cells arranged side by side in a first direction and each comprising a first terminal and a second terminal to improve the durability and safety of the battery pack; a protection circuit module disposed on the plurality of unit cells; and a temperature element unit disposed on the plurality of unit cells in the first direction and comprising a first temperature element, a second temperature element, a first plate connecting the first temperature element and the second temperature element, and a second plate having an end electrically connected to the protection circuit module and another end electrically connected to the first plate disposed between the first temperature element and the second temperature element.

Provided is a power supply device which includes a plurality of battery modules and in which the battery modules are connected in series with one another in accordance with a gate driving signal from a controller. The power supply device includes a disconnecting part configured to forcibly isolate the battery module from a series connection regardless of the gate driving signal, and limits, in accordance with a target output voltage value, a number of the battery modules to be forcibly isolated by the disconnecting part.

A laminated busbar assembly includes one or more busbars that are configured to be electrically coupled to a plurality of battery cells, one or more insulative layers arranged adjacent to the one or more busbars, and a steel layer arranged between the one or more busbars and the plurality of battery cells. The steel layer is configured to shield the one or more busbars from a thermal event associated with one or more battery cells of the plurality of battery cells. The thermal event may include a debris, hot gas, sparks, embers, or other emanations. Each of the battery cells each include a respective venting end, where electrical terminals are located, that face the steel layer. The laminated busbar is a stack of layers that can include two busbars that form a DC bus, with insulation arranged between the busbars and between the steel layer and the proximal busbar.

The present invention relates to an electrode lead made of dissimilar metals and a method of manufacturing the same, and more particularly to an electrode lead including a first metal plate and a second metal plate, wherein a first metal constituting the first metal plate and second metals having a lower melting temperature than the first metal are mixed in the second metal plate in the state in which the second metals are dispersed, and a method of manufacturing the same.

This invention provides a thermal runaway suppression element for lithium batteries and the related applications. The thermal runaway suppression element includes a composite salt layer provided by a eutectic mixture containing at least two single inorganic salts. The composite salt layer has a melting point between 90 to 150° C. At least one of the single inorganic salts comprises a cation, which is an amphoteric metal ion or an alkali metal ion. The thermal runaway suppression element is disposed inside or outside the lithium battery. When the temperature of the lithium battery reaches to 90 to 150° C., the composite slat layer will be molten and reacts with the electrochemical reaction system to passivate the active materials and decrease ionic and electronic conductivity. Therefore, the thermal runaway event and its derived problem are efficiently solved.

A battery module includes a plurality of battery cells; a module housing configured to accommodate a cell stack including the plurality of battery cells; a sprinkler provided through the module housing at one side of the cell stack in a stacking direction; and a thermally expanding block disposed in an empty space inside the module housing and configured to be thermally expanded according to a temperature rise inside the module housing.