| CPC H01M 10/658 (2015.04) [A62C 3/16 (2013.01); H01M 10/613 (2015.04); H01M 10/647 (2015.04); H01M 10/655 (2015.04); H01M 10/6555 (2015.04); H01M 10/659 (2015.04); H01M 50/211 (2021.01); H01M 50/231 (2021.01); H01M 50/24 (2021.01); H01M 50/244 (2021.01); H01M 50/247 (2021.01); H01M 50/249 (2021.01); H01M 50/258 (2021.01); H01M 50/383 (2021.01); H01M 2200/10 (2013.01); Y02E 60/10 (2013.01)] | 19 Claims |
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1. A battery module including a plurality of secondary battery cells accommodated in a housing member,
wherein a secondary battery cell among the plurality of battery cells includes an electrode assembly and a pouch case encasing the electrode assembly,
wherein a multilayered firewall is interposed between the plurality of secondary battery cells, and the multilayered firewall includes a heat absorption layer and fireproof layers stacked on opposing surfaces of the heat absorption layer,
wherein a thickness of a central portion of the heat absorption layer is greater than a thickness of a central portion of the fireproof layers, wherein the central portion of the fireproof layers is a region in thermal contact with a region in which a composite layer of the secondary battery is formed, and
wherein a thickness of the outer portion of the heat absorption layer is equal to or less than a thickness of an outer portion of the fireproof layers and is less than the thickness of the central portion of the heat absorption layer, wherein the outer portion of the fireproof layers is a region in thermal contact with a peripheral of the plurality secondary battery cells.
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