Systems and methods for controlling the emission of gases and/or flames emitted from one or more electrochemical cells are disclosed. In one exemplary embodiment, gas emitted from an electrochemical cell located within an interior of an enclosure may be flowed through a flow restriction to reduce a pressure and/or temperature of the gas and/or the gas may be flowed through a catalyst prior to exiting through an outlet of the enclosure.

A lead-acid battery (100) is provided with a lid (14). An external flow passage (530) communicating with a communication chamber (520) through a vent hole (321) and communicating with a discharge port (405) of a lid (14) is formed inside the lid (14). A compartment fence (452, 454) continuously extending over the entire width of the external flow passage (530) is formed in the external flow passage (530). A residual volume is larger than the volume of the communication chamber (520), the residual volume being obtained by subtracting, from the total volume of a plurality of external spaces (460, 462, 464) divided by the compartment fence (452, 454), the volume of the discharge-side external space (464) closest to the discharge port among the plurality of external spaces.

A lead-acid battery (100) is provided with a lid (14). A communication chamber (520) is formed inside the lid (14). The communication chamber (520) is provided with an internal flow passage forming part (432, 522) forming an internal flow passage (Q) which communicates with a vent hole (321) and is located on the other side in a first direction than the vent hole (321). At least a part of the surface of the internal flow passage forming part (432, 522) has an uneven part (T).

Systems and methods for controlling the emission of gases and/or flames emitted from one or more electrochemical cells are disclosed. In one exemplary embodiment, gas emitted from an electrochemical cell located within an interior of an enclosure may be flowed through a flow restriction to reduce a pressure and/or temperature of the gas and/or the gas may be flowed through a catalyst prior to exiting through an outlet of the enclosure.

A battery pack is provided which includes an enclosure. The enclosure includes a battery cell compartment and a vent. The battery cell compartment is a sealed compartment, except for the vent, and the vent facilitates pressure-induced venting of gas from the battery cell compartment. One or more battery cells are disposed within the battery cell compartment, and the battery pack also includes a filter system associated with the enclosure. The filter system filters the pressure-induced venting of gas from the battery cell compartment resulting from a thermal runaway event at a battery cell of the one or more battery cells within the battery cell compartment of the enclosure.

A thermal propagation prevention device and method for a battery pack including a plurality of battery cells. The device includes a liquid loaded material, such as a hydrogel or liquid loaded superabsorbent polymer, contained in a propagation arrestor configured to cover at Least one of the plurality of battery cells. The liquid loaded material is configured to phase change under heat from a rupture of the at least one of the plurality of battery cells and release a quenching vapor. The vapor further dilutes the electrolyte released from the at least one of the plurality of battery cells.

The present disclosure relates to the technical field of battery system, and discloses a battery, a battery enclosure and a vehicle, wherein the battery comprises a battery enclosure (7) defining a receiving space; a thermal isolation panel (4) disposed in the receiving space and dividing the receiving space into a plurality of subspaces; and a plurality of cells (5) respectively arranged in the subspaces and divided into a plurality of groups by the thermal isolation panel (4); wherein a weakened zone (6) for guiding energy release when thermal runaway occurs in the cells (5) is formed on an enclosure wall of the battery enclosure (7) adjacent to the cell (5). The cells of the batter are separated by the thermal isolation panel so as to prevent the thermal runaway events from rapid spreading in the battery. At the same time, by providing a weakened zone on the battery enclosure wall adjoining the cell, an optimal venting direction can be provided for the cell in case of a thermal runaway, thus the battery has high safety.

A rechargeable battery is introduced, and an exemplary embodiment of the present invention provides a rechargeable battery including: an electrode assembly configured to charge and discharge a current; a case accommodating the electrode assembly therein; a cap plate configured to seal an opening of the case; an electrode terminal electrically connected to the electrode assembly and externally drawn out through the cap plate; a first valve assembly installed in an electrolyte injection opening of the cap plate to open and close the electrolyte injection opening; a gas removal opening formed in the cap plate to remove a gas; and a second valve assembly installed in the gas removal opening to open and close the gas removal opening.

A battery pack is provided which includes an enclosure. The enclosure includes a battery cell compartment and a vent. The battery cell compartment is a sealed compartment, except for the vent, and the vent facilitates pressure-induced venting of gas from the battery cell compartment. One or more battery cells are disposed within the battery cell compartment, and the battery pack also includes a filter system associated with the enclosure. The filter system filters the pressure-induced venting of gas from the battery cell compartment resulting from a thermal runaway event at a battery cell of the one or more battery cells within the battery cell compartment of the enclosure.

Lithium ion batteries are provided that include materials that provide advantageous endothermic functionalities contributing to the safety and stability of the batteries. The endothermic materials may include a ceramic matrix incorporating an inorganic gas-generating endothermic material. If the temperature of the lithium ion battery rises above a predetermined level, the endothermic materials serve to provide one or more functions to prevent and/or minimize the potential for thermal runaway, e.g., thermal insulation (particularly at high temperatures); (ii) energy absorption; (iii) venting of gases produced, in whole or in part, from endothermic reaction(s) associated with the endothermic materials, (iv) raising total pressure within the battery structure; (v) removal of absorbed heat from the battery system via venting of gases produced during the endothermic reaction(s) associated with the endothermic materials, and/or (vi) dilution of toxic gases (if present) and their safe expulsion from the battery system.