A device for depassivation of an energy storage device having an anode, a cathode and a core with an electrolyte, the device including: a first switch configured to provide a positive input voltage to the anode; a second switch configured to provide a negative input voltage to the anode; and a controller configured to: detect that a first predetermined event related to a buildup of passivation has occurred with regard to the energy storage device; switch between a positive input voltage and a negative input voltage provided to the anode at a frequency sufficient to depassivate the anode; discontinue the switching when a second predetermined event related to passivation has occurred.

The present disclosure provides a heat-diffusible separator including a separator, and a porous heat transfer film formed on at least one surface of the separator.

An electrode assembly and a secondary battery including the same are provided. The electrode assembly includes an electrode stack, in which electrodes and a separator are alternately stacked to be wound, and a temperature difference compensating member disposed at a winding center of the electrode stack such that a temperature difference between a winding outer shell and a winding center of the electrode stack is reduced. The temperature difference compensating member includes a phase change material.

An electrode assembly and a secondary battery including the same are provided. The electrode assembly includes an electrode stack, in which electrodes and a separator are alternately stacked to be wound, and a temperature difference compensating member disposed at a winding center of the electrode stack such that a temperature difference between a winding outer shell and a winding center of the electrode stack is reduced. The temperature difference compensating member includes a phase change material.

A sulfide all-solid-state battery which is capable of absorbing heat by a heat absorbing layer at abnormal heat generation and maintaining capacity of a battery at a high level for a long time use is provided. The sulfide all-solid-state battery contains at least one unit cell, at least one heat absorbing layer, a battery case which accommodates the unit cell and the heat absorbing layer, the unit cell contains sulfide solid electrolyte, the heat absorbing layer contains at least one organic heat absorbing material selected from the group consisting of sugar alcohols and hydrocarbons, and the heat absorbing layer does not contain an inorganic hydrate.

A sulfide all-solid-state battery which is capable of absorbing heat by a heat absorbing layer at abnormal heat generation and maintaining capacity of a battery at a high level for a long time use is provided. The sulfide all-solid-state battery contains at least one unit cell, at least one heat absorbing layer, a battery case which accommodates the unit cell and the heat absorbing layer, the unit cell contains sulfide solid electrolyte, the heat absorbing layer contains at least one organic heat absorbing material selected from the group consisting of sugar alcohols and hydrocarbons, and the heat absorbing layer does not contain an inorganic hydrate.

Certain embodiments of the invention relate to the design of three-dimensional battery cells and their incorporation into battery modules and battery packs. The present invention may be particularly advantageous when incorporated into large battery packs, for example, those used in electric vehicles. The unique architecture of the battery cells of certain embodiments of the invention provides improved thermal performance with significant impact on cycle and calendar life when incorporated into a battery pack. Substantially higher pack energy density for a given cell energy density is provided when compared to a conventional cell. Battery cells can be strung together to form modules and packs with whatever series/parallel arrangement required for a particular application. Cooling, if needed, can be incorporated at the module level rather than the individual die level, as is the case with conventional architectures, dramatically reducing the cost of the system.

Lithium electrochemical accumulator including at least one first package housing at least one electrochemical cell, said first package including at least: one internal thermally insulating layer suitable for confining, to the interior of a first package, the heat given off even in case of abnormal operation of a cell C and for protecting the cell(s) from heat generated outside the first package; one external layer superposed on the internal layer, the external layer being mechanically strong and fire resistant; and one cooling device including at least one heat pipe the enclosure of which passes through the first package(s) in a seal-tight manner and such that the heated zone of the heat pipe(s) is located inside the first package(s) and that the cooled zone of the heat pipe(s) is located outside the first package(s).

Lithium electrochemical accumulator including at least one first package housing at least one electrochemical cell, said first package including at least: one internal thermally insulating layer suitable for confining, to the interior of a first package, the heat given off even in case of abnormal operation of a cell C and for protecting the cell(s) from heat generated outside the first package; one external layer superposed on the internal layer, the external layer being mechanically strong and fire resistant; and one cooling device including at least one heat pipe the enclosure of which passes through the first package(s) in a seal-tight manner and such that the heated zone of the heat pipe(s) is located inside the first package(s) and that the cooled zone of the heat pipe(s) is located outside the first package(s).

A battery module includes a cell stack including a plurality of a battery cell, a module case at least partially accommodating the cell stack, and a cooling unit disposed at one side of the cell stack. The battery cell includes a cell case, an electrode assembly and an electrolyte accommodated in the cell case, and an electrolyte storage unit inserted into the cell case to supply a supplementary electrolyte. The electrolyte storage unit is disposed between the electrode assembly and the cooling unit in a cross-sectional view.