The present disclosure relates to a battery module including: a battery cell stack in which a plurality of battery cells are stacked; and a pressure drop sheet on one side of the battery cell stack, in which the pressure drop sheet includes: a ventilation layer including ceramic fiber; and a sacrificial layer on at least one face of the ventilation layer, the sacrificial layer is disposed in a direction facing the battery cell stack, and the pressure drop sheet exhibits gas permeability at a critical temperature.

The present invention relates to a battery comprising: -i) at least two electrochemical elements (d) connected to one another by a connection part (c), each electrochemical element comprising a container, -ii) a material arranged between said at least two electrochemical elements, and -iii) at least one disconnection device, said device comprising: a heat-activatable element (a) able to deform when its temperature reaches a threshold value, the heat-activatable element being arranged such that, when its temperature QI reaches said threshold value, it disconnects the connection part (c) from at least one electrochemical element (d) through its deformation, said heat-activatable element not contributing to the conduction of electric current when an electric current flows through said electro-chemical elements, said heat-activatable element being placed in contact with the connection part (c) and with a current output terminal.

A separator, a lithium-ion cell including the separator, and an electric apparatus including the lithium-ion cell. The separator includes a separator substrate and a coating layer disposed on the separator substrate, and the separator is adhered to an adjacent first electrode plate or second electrode plate through the coating layer. The coating layer is configured to decrease a peel force between the separator and an external component when a temperature is higher than a preset threshold or to be capable of chemically reacting with an acidic substance. When the temperature is higher than a threshold, the peel force between the separator and an adjacent electrode plate is decreased. To be specific, such lithium-ion cell can improve a current situation that the peel force between the separator and the electrode plate remains relatively great when the temperature of the cell is higher than a threshold.

Systems and methods for operating a lithium-ion battery high-voltage distribution system architecture are disclosed. A battery pack includes: a plurality of lithium-ion battery cells; a disconnect mechanism operable in an operational position between a battery bus and the plurality of lithium-ion battery cells and a bypass position between the battery bus and a bus-power pass through; and a battery management system. The battery management system is eon figured to monitor battery pack performance, and responsive to detecting a triggering event in the battery pack performance, cause the disconnect mechanism to be in the bypass position.

A temperature control device for temperature control of a battery system has at least one battery subsystem. The temperature control device has a temperature control line for conducting a temperature control fluid and a pump device for generating a flow of the temperature control fluid in the temperature control line at least in a first flow direction. The temperature control line has at least one temperature control section which can be thermally conductively connected to the at least one battery subsystem for supplying and/or discharging thermal energy to or from the battery subsystem.

A method performed by a control unit for controlling flooding of at least part of an energy storage space. The energy storage space comprises at least one Energy Storage System, ESS. The control unit detects that a critical condition associated with the at least one ESS is present. When the critical condition has been detected, the control unit initiates flooding of at least part of the energy storage space with a fluid from a reservoir. The control unit controls the flooding of the energy storage space such that the at least one ESS is submersed to a submersion level where the critical condition is no longer present.

A unit cell including a thermochromic polymer and a defect detection method using the same are disclosed. Preferably, the unit cell includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, wherein the separator includes a thermochromic polymer configured such that the color of the thermochromic polymer changes depending on temperature, whereby the unit cell is easily checked to indicate a short circuit, as well as damage to or defects of the separator.

The description relates to battery safety and more specifically to containing battery fires. One example can include displacement sub-systems configured to physically separate an affected battery pack from other battery packs. Another example can include a 3D deployable fire curtain configured to automatically deploy around a battery pack to limit the spread of fire between battery packs. A further example can include a media reservoir positioned over a battery pack that is configured to hold non-combustible smothering media. A media retainer can be interposed between the battery pack and the media reservoir and configured to automatically release the non-combustible smothering media into the battery pack support structure when the battery pack experiences a fire.

A battery pack includes: a plurality of battery cells arranged into rows adjacent to each other, adjacent rows of battery cells being alternately shifted to front positions or rear positions in a row direction; busbars arranged to form a parallel group of battery cells by connecting a group of battery cells to each other in parallel, and connecting adjacent parallel groups to each other in series, the busbars including a body portion extending in a zigzag shape in a column direction and a first and second branch portion extending in the row direction from the body portion toward different parallel groups; and expansion pieces protruding from the body portion of the busbar to external positions outside the plurality of battery cells in the row direction or the column direction.

A battery pack includes at least one battery cell; a protection circuit module electrically connected to the at least one battery cell; and a thermocompression bonding layer, the thermocompression bonding layer providing a disconnectable electrical connection between an electrode tab of the at least one battery cell and a connection tab of the protection circuit module, wherein the thermocompression bonding layer includes conductive particles and an insulating composite resin layer, the insulating composite resin layer surrounds the conductive particles, and the insulating composite resin layer includes at least one first resin layer and at least one second resin layer, the at least one first resin layer being different from the at least one second resin layer.