A battery pack and an electric vehicle are provided. The battery pack includes a battery sequence. The battery sequence includes multiple cells. A thickness of each cell extends along a first direction. The multiple cells are arranged in sequence along the first direction to form the battery sequence. At least one of the cells includes a metal shell and an electrode core packaged in the metal shell. An air pressure inside the metal shell is lower than an air pressure outside the metal shell. A gap is provided between at least two adjacent cells. A ratio of the gap to the thickness of the cell ranges from 0.001 to 0.15.

A cell (100) is provided, which includes a metal housing (11) and multiple electrode core strings encapsulated in the metal housing (11). The multiple electrode core strings are arranged in a second direction and sequentially connected in series. Each of the electrode core strings includes an encapsulation film (13) and multiple electrode core assemblies (12) arranged in a first direction and sequentially connected in series. The electrode core assemblies (12) are encapsulated in the encapsulation film (13). An air pressure between the metal housing (11) and the encapsulation film (13) is lower than an air pressure outside the metal housing (11).

A cell (100) is provided, which includes a metal housing (11) and multiple electrode core strings encapsulated in the metal housing (11). The multiple electrode core strings are arranged in a second direction and sequentially connected in series. Each of the electrode core strings includes an encapsulation film (13) and multiple electrode core assemblies (12) arranged in a first direction and sequentially connected in series. The electrode core assemblies (12) are encapsulated in the encapsulation film (13). An air pressure between the metal housing (11) and the encapsulation film (13) is lower than an air pressure outside the metal housing (11).

The present disclosure provides a battery pack housing, a battery pack, and an electric vehicle. The battery pack housing includes a housing body and at least one structural beam disposed in the housing body. The at least one structural beam divides the internal space of the housing body into a number of accommodation cavities. The housing body includes a top plate and a bottom plate arranged opposite to each other in a first direction, the first direction is a height direction of the battery pack housing, and the structural beam is located between and attached to the top plate and the bottom plate. The battery pack housing comprises a mounting part for connecting mounting portion for a fixed connection with an external load. The battery pack housing disclosed in the present disclosure has relatively high strength and stiffness as well as high space utilization.

A heating sheet and a battery module are provided. The battery module includes multiple battery cells and a heating sheet. The heating sheet includes multiple heating units and multiple connection units, and two adjacent heating units are coupled with each other through a connection unit. One heating unit may be attached to a side wall of one battery cell, and the connection unit corresponds to the gap region.

A battery rack effectively prevents the spread of a fire or heat to adjacent battery packs when the fire or thermal runaway occurs in any of a plurality of battery packs. To achieve the above-described object, the battery rack includes a plurality of battery packs; and a rack case having a receiving space with an open structure in which the plurality of battery packs is vertically mounted at intervals and placed in vertical communication with one another, wherein a stopper is provided in the receiving space and disposed between the plurality of battery packs, spaced apart from the plurality of battery packs, and is configured to suppress volume expansion of the battery pack when the volume of the battery pack expands.

A battery rack effectively prevents the spread of a fire or heat to adjacent battery packs when the fire or thermal runaway occurs in any of a plurality of battery packs. To achieve the above-described object, the battery rack includes a plurality of battery packs; and a rack case having a receiving space with an open structure in which the plurality of battery packs is vertically mounted at intervals and placed in vertical communication with one another, wherein a stopper is provided in the receiving space and disposed between the plurality of battery packs, spaced apart from the plurality of battery packs, and is configured to suppress volume expansion of the battery pack when the volume of the battery pack expands.

The battery rack includes a plurality of battery packs vertically arranged, each battery pack including a plurality of secondary batteries stacked in a direction, and a pack housing having an internal space to receive the plurality of secondary batteries and configured to be supplied with a fire extinguishing liquid when an internal temperature equals or rises above a predetermined temperature, and a rack case having a receiving space to receive the plurality of battery packs, and including a plurality of rack plates, each having a mounting surface on which the battery pack is mounted, the mounting surface sloping at a predetermined angle with declining height as it goes in any one direction, and an extension portion having an end of any one direction extending further outward than the lower battery pack.

An energy storage apparatus includes an energy storage device, a spacer disposed in a predetermined direction of the energy storage device, and an adhesive layer which is disposed between the energy storage device and the spacer and bonds the energy storage device and the spacer to each other. The spacer includes a first protruding portion which is disposed at a position adjacent to the adhesive layer in an intersecting direction which intersects the predetermined direction and projects toward the energy storage device and a second protruding portion which is disposed at a position different from the first protruding portion and projects toward the energy storage device and has a protrusion height lower than that of the first protruding portion.

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.