A wiring module includes a flexible substrate, a sensor component (temperature sensor), a connecting member (bus bar), and a holding part-equipped relay member, wherein the holding part-equipped relay member includes: a relay member main body including a base part (first main plate) that is to be fixed to the flexible substrate and the bus bar, and a holding part (first holding piece) that is continuous with the first main plate; a pedestal part (housing) that is to be held by the first holding piece so as to be displaceable in a direction toward or away from the first main plate, and that is to be fixed to a position of the flexible substrate where the temperature sensor is mounted; and a biasing member that has elastic force, that has one end held by the first main plate, and that biases the housing in the direction away from the first main plate.

A battery pack including a first battery cell and a second battery cell. The first battery cell is received at least partially within a primary cell casing and extends along a first axis. The second battery cell is received at least partially within an auxiliary cell casing extending along a second axis, the second battery cell being movable relative to the first battery cell.

The battery module includes: a battery cell stack in which a plurality of battery cells including electrode leads are stacked; a plurality of bus bars including a first bus bar and a second bus bar that are respectively connected to at least one of the electrode leads; and a safety member that comes into contact with each of the first bus bar and the second bus bar, wherein the safety member includes a first insulating layer located on the first bus bar, a second insulating layer located on the second bus bar, and a conductive layer located on the first insulating layer and the second insulating layer, and wherein the first insulating layer and the second insulating layer include a material that is electrically insulating and is removed in accordance with the rise of temperature.

An HV busbar configured to connect a plurality of battery modules to each other, has a conductor including a first metal plate and a second metal plate and an insulative resin coating layer on the outer circumferential surface of the conductor, 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.

Systems and methods are described for thermal management, detection of abnormal cell heating, prevention of thermal runaway in the failing battery as well as the prevention of thermal runaway propagation and fire spread in battery systems. Battery systems and modules under the present disclosure can comprise deformation elements that deform when heated by a battery experiencing some type of failure. The deformation can be used to puncture a coolant tube, activate a nozzle, or otherwise release coolant onto the failing battery. The direct contact heat transfer, such as under boiling conditions, can quickly dissipate the heat using less coolant than prior art systems. Electrical circuits can automatically detect the deformation and disconnect the failing module or battery from a larger system.

A system for mitigating fire within a battery storage container enclosing an energy storage system includes a sensor configured to detect a precursor condition indicative of a potential fire or explosion, a controller, and a set of extendable battery trays, each including a tray ejector and containing a set of battery cells. The controller detects a precursor condition in a battery tray via the sensor and ejects the battery tray to increase the distance between the battery tray and adjacent battery trays. The system can include a cooling channel in the battery tray configured to cool the set of battery cells, and/or a nozzle configured to direct fluid into the battery tray to suppress the precursor condition. In one variation, the system includes a door of the container configured to open, venting the interior of the container in response to detection of a precursor condition indicating a potential explosion.

The present disclosure provides a battery module, including a first battery cell arrangement structure, a second battery cell arrangement structure and a bus bar array. With battery cells stacked in a horizontal direction, a first battery cell arrangement structure and a second battery cell arrangement structure are stacked in a vertical direction, and a first bus bar of a bus bar array is used to sequentially connect the battery cells of the first battery cell arrangement structure and the second battery cell arrangement structure. As a result, a total positive electrode and a total negative electrode of a battery module are located at two ends of the battery module, which greatly reduces the possibility of a short circuit of the battery module and improves the safety of the battery module.

An electric battery (20) comprises a multiplicity of individual cells (21). The battery (20) has at least one temperature measurement device (10). The temperature measurement device (10) comprises a multilayer circuit board (1) as carrier element, having an upper conductive layer (1a) and a lower conductive layer (1b), a multiplicity of temperature sensors (2) that are each configured to generate a temperature-dependent measured signal, and a multipole terminal (11) for reading the measured signals. Each of the multiplicity of temperature sensors (2) is in each case arranged on a first insulated region (5a) of the upper conductive layer (1a). The lower conductive layer (1b) has, for each temperature sensor (2), a second insulated region (5b) as thermal contact surface. Each first insulated region (5a) is thermally conductively connected to a corresponding second insulated region (5b), in each case via at least one through-connection (4). The second insulated regions (5b) are each in thermally conductive contact with at least one cell connector (22) of the battery (20).

A battery pack includes at least one cell assembly including a plurality of secondary batteries stacked in a direction, a module housing having an internal space in which the at least one cell assembly is received, and a spacer member interposed between the plurality of secondary batteries, and configured to press the plurality of secondary batteries in two directions to space the plurality of secondary batteries apart when a temperature of at least one of the plurality of secondary batteries is equal to or higher than a predetermined temperature.

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.