The present invention relates to a pressure relief element (11) to be used as an overpressure safety means in devices where a gaseous medium must be rapidly released in case of overpressure, wherein the pressure relief element (11) has at least one notch (9) which is designed as a predetermined breaking point where the pressure relief element (11) breaks at a certain level of overpressure, thereby irreversibly opening an exhaust path for the gaseous medium. The present invention also relates to a pressure relief device of an electrochemical battery, comprising such a pressure relief element and a battery comprising such a pressure relief device.

A battery module includes a battery assembly including a plurality of sub-packing units, the plurality of sub-packing units respectively including a cell housing, at least one battery cell accommodated in an internal space of the cell housing, and at least one vent hole disposed in the cell housing and connecting the internal space to an outside of the cell housing, and a flame blocking structure coupled to the battery assembly, and including an inlet hole connected to the vent hole, an inner chamber communicating with the inlet hole, an outlet hole communicating with the inner chamber and the outside, and at least one partition wall protruding into the inner chamber.

A battery module includes a lower housing and a plurality of battery cells. The plurality of battery cells are electrically coupled together to produce a voltage. The module also includes an assembly disposed over the battery cells and coupled to the lower housing. The assembly may include a lid and a plurality of bus bar interconnects mounted on the lid. The module also includes a printed circuit board (PCB) assembly disposed on and coupled to the assembly. The PCB assembly may include a PCB. The module also includes a cover disposed over and coupled to the lower housing to hermetically seal the battery module. Also disclosed is a method of manufacturing the battery module.

A battery module includes a lower housing and a plurality of battery cells. The plurality of battery cells are electrically coupled together to produce a voltage. The module also includes an assembly disposed over the battery cells and coupled to the lower housing. The assembly may include a lid and a plurality of bus bar interconnects mounted on the lid. The module also includes a printed circuit board (PCB) assembly disposed on and coupled to the assembly. The PCB assembly may include a PCB. The module also includes a cover disposed over and coupled to the lower housing to hermetically seal the battery module. Also disclosed is a method of manufacturing the battery module.

A marine battery system configured to provide energy to a marine vessel load is provided. The marine battery system includes a main enclosure body and an auxiliary enclosure body that is detachably coupled to the main enclosure body to define a sealed battery volume. The auxiliary enclosure body is configured to perform a pressure accommodation action responsive to an increase in a temperature within the sealed battery volume. The marine battery system further includes a battery disposed within the sealed battery volume.

A battery vent assembly that includes an expanded metal filter collar which acts as a heat sink to cool and overheating battery. Further the vent assembly acts as a particulate filter and flame arrestor which prevents and/or reduces flames and particulate slag projectiles from being expelled outside an individual cell or bank of cells in a battery. The Directional Flow Expanded Metal (DFEM) and Variable Expanded Metal (VEM) utilizes directional fins and associated plethora of openings offset in overlapping layers to create a centrifuge or cyclone effect for gases or particles passing through the filter. The fins and holes are offset from layer to layer within the wrap of the collar filter and are designed to immediately change the direction of the flames and burning particles relative to the input flame flow direction.

A vent plug (18) includes a head portion (35), a cylindrical portion (36), and a filter (34). The cylindrical portion (36) includes a cylinder portion (40), a screw thread portion (42), a slit (45), and a through hole (43). The filter (34) is disposed at a position where the through hole (43) is provided in a central axis (L) direction. The screw thread portion (42) intersects the slit (45) only at a first-peripheral screw thread portion.

A vent plug (18) includes a head portion (35), a cylindrical portion (36), and a filter (34). The cylindrical portion (36) includes a cylinder portion (40), a screw thread portion (42), a slit (45), and a through hole (43). The filter (34) is disposed at a position where the through hole (43) is provided in a central axis (L) direction. The screw thread portion (42) intersects the slit (45) only at a first-peripheral screw thread portion.

A vent assembly for a battery or a electrochemical cell may include a vent body configured to connect to a battery casing or a electrochemical cell body, a flame arrester and/or a pressure valve disposed in the vent body, a membrane disposed in the vent body between a vent opening of the battery or the electrochemical cell and the flame arrester and/or the pressure valve, and that is configured to shield the flame arrester and/or the pressure valve from electrolyte solution of the battery or the electrochemical cell, and a seal disposed between the vent body and the membrane. Also, a battery including a vent assembly.

The present invention discloses a degassing device for battery cell to remove gas generated inside the battery cell, the degassing device comprises: a frame body including a driving shaft moving straight, and fixed shafts fixed on the driving shaft; a module fixed member including a module actuator body combined with the driving shaft and a module fixed body fixed to the fixed shafts to guide the driving shaft to move straight; a first actuator module mounted on the module actuator body, and a second actuator module mounted on the module fixed body to face the first actuator module, wherein the first and second actuator module are a pair facing each other and enables the battery cell to discharge gas and the perforated portion to be sealed, wherein and a plurality of the pairs are installed on the driving shaft and the fixed shafts.