BATTERY PACK PROVIDING IMPROVED DISTRIBUTION UNIFORMITY OF COOLANT

摘要

PURPOSE: A battery pack is provided to minimize pressure difference, to restrain the performance degradation of unit cell, to effectively remove heat generated from a unit cell by uniform coolant supply, thereby improving cooling efficiency. CONSTITUTION: A battery pack(203) comprises a plurality of battery cells or unit cells(101) which are electrically connected, and composes one battery module layers(100A,100B) by erect-arranged along transversal direction of a battery pack. Two or more battery module layers are mounted in a pack case to laminated structure arranged longitudinal direction of a battery pack, and comprise coolant inflow part coolant is flowed into two or more battery module layers at the same time in order to cool unit cells in two or more battery module at the same time, and a coolant outflow part exhausting coolant passed through the unit cells.