A battery pack includes: a plurality of battery modules; a venting inducing frame disposed along an edge of the battery modules and forming a venting passage; a venting gate for connecting an inside of the battery modules and the venting inducing frame; a rupture portion formed on an outside of the venting inducing frame; and a unidirectional valve formed on a passage of the venting inducing frame, wherein the unidirectional valve intercepts a passage in a direction connected to a venting gate connected to a second battery module from the venting gate connected to one battery module from among the battery modules, and opens a passage in a direction connected to the rupture portion from the venting gate connected to one battery module from among the battery modules.

A battery module with enhanced stability against fire and explosion. The battery module includes a cell assembly having a plurality of secondary batteries, a lower case having an open top and having an accommodation space, an upper case coupled to the lower case to cover the open top of the lower case and having a connection hole perforated to communicate with the accommodation space; an upper cover coupled to the upper case to cover an upper portion of the upper case and configured to form a buffer space spaced apart from the upper case, the upper cover having a discharge hole perforated so that the buffer space communicates with the outside; and at least one partition member extending in a horizontal direction inside the buffer space to form a moving passage extending from the connection hole to the discharge hole and configured to have an adjustable extension length.

A battery pack includes battery cells; a battery cell holder in which the battery cells are accommodated; and an exhaust pipe, wherein the battery cell holder includes a first cell holder to which upper end portions of the battery cells are assembled, a second cell holder to which lower end portions of the battery cells are assembled, and a first separation member on the first cell holder, the exhaust pipe extends from an outer sider surface of the battery cell holder, and the exhaust pipe is in fluid communication with an exhaust path between the first separation member and an outer side surface of the first cell holder.

A battery pack includes battery cells; a battery cell holder in which the battery cells are accommodated; and an exhaust pipe, wherein the battery cell holder includes a first cell holder to which upper end portions of the battery cells are assembled, a second cell holder to which lower end portions of the battery cells are assembled, and a first separation member on the first cell holder, the exhaust pipe extends from an outer sider surface of the battery cell holder, and the exhaust pipe is in fluid communication with an exhaust path between the first separation member and an outer side surface of the first cell holder.

The present invention pertains to a supporting structure for receiving battery cells in a battery system of a hybrid or electrical vehicle, the supporting structure comprising a bottom plate and two side plates arranged on the bottom plate, wherein the inner sides of the two side plates and the bottom plate define an internal volume for receiving the battery cells and wherein each side plate comprises a flange at its outer side and wherein each flange comprises fixation means for fastening the supporting structure to an adjacent supporting structure.

The present invention pertains to a supporting structure for receiving battery cells in a battery system of a hybrid or electrical vehicle, the supporting structure comprising a bottom plate and two side plates arranged on the bottom plate, wherein the inner sides of the two side plates and the bottom plate define an internal volume for receiving the battery cells and wherein each side plate comprises a flange at its outer side and wherein each flange comprises fixation means for fastening the supporting structure to an adjacent supporting structure.

The present invention pertains to a battery housing for receiving battery cells, preferably for use in an electric or hybrid vehicle, the battery housing comprising a bottom plate forming a base of the housing, wherein the bottom plate is connectable to another bottom plate of the same kind by means of a connection system to form a modular bottom of the housing.

The present application provides a battery cell, including a cover plate, a housing, and a gas-permeable film. The housing has an opening, and the cover plate covers the opening of the housing. The cover plate and/or housing have/has at least one through hole, and the inside and the outside of the battery cell are in communication with each other via the through hole; and the gas-permeable film is connected to the inside of the cover plate and/or housing and covers the at least one through hole. According to the battery cell of the present application, gas inside a battery can be discharged to prevent the gas from accumulating inside the housing, thereby improving performance of an electrode assembly, prolonging service life of a secondary battery, and ensuring safety performance of the battery cell.

A fluid drainage arrangement for a battery arrangement, the fluid drainage arrangement having a fluid inlet, a collecting chamber, a membrane, a labyrinth chamber and a fluid outlet. The membrane is provided between the collecting chamber and the labyrinth chamber and has a closed state (Z1) and an open state (Z2). The membrane is designed, in the closed state (Z1), to collect a coolant, which passes into the collecting chamber via the fluid inlet, in the collecting chamber until the membrane, at a predetermined first differential pressure between a side of the membrane that is assigned to the collecting chamber and a side of the membrane that is assigned to the labyrinth chamber, transitions from the closed state (Z1) into the open state (Z2) and allows drainage of the coolant via the labyrinth chamber to the fluid outlet.

A battery pack includes a first battery case accommodating a plurality of cells, and a second battery case laminated above the first battery case and accommodating a plurality of cells. The first battery case has a first through-hole on an upper surface. The second battery case has a second through-hole on a bottom surface which communicates with the first through-hole. The battery pack includes a communication port composed of the first through-hole and the second through-hole, a gas discharge valve which is provided only in either the first battery case or the second battery case and opens when internal pressure of the battery pack is higher than a predetermined value, and a temperature sensor provided on a gas flow path connected to the gas discharge valve.