| CPC H01M 10/6568 (2015.04) [H01M 10/613 (2015.04); H01M 10/6556 (2015.04); H01M 50/30 (2021.01)] | 14 Claims |
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1. A battery rack comprising:
a housing;
a module unit provided in the housing, including a plurality of battery cells, and having at least one vent hole; and
a cooling unit provided to face the vent hole in the housing, and including a cooling line in which a coolant is provided,
wherein the cooling unit further includes a fixing line accommodating the cooling line therein, and formed of a material having a different phase change temperature from a material of the outer periphery of the cooling line, and the fixing line includes an open portion and a hollow portion, and the open portion is formed by spacing ends of the fixing line apart from each other in a cross section of the fixing line in a thickness direction,
wherein the cooling line is accommodated in the fixing line to directly face the vent hole in the open portion, while being present in the open portion and the hollow portion,
wherein the cooling line includes a first material having a first phase change temperature on the outer periphery thereof, the fixing line includes a second material having a second phase change temperature on the outer periphery thereof, and the first phase change temperature is lower than the second phase change temperature, and
wherein the cooling line is provided so that at least a portion of an outer periphery thereof is melted by heat generated from the module unit to supply the coolant toward the vent hole.
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