Patent ID: 9224997
Filing Date: 2015-12-29
Classification: H01M,Y02E

Abstract:
1. A battery pack, comprising: at least one battery cell; and a double-walled housing including at least one inner casing and at least one outer casing that define the walls of the housing, wherein the inner casing defines an internal volume configured to accommodate the at least one battery cell, wherein the inner casing and the outer casing define an intermediate volume continuously and entirely surrounding the inner casing, the intermediate volume enclosed entirely between the inner casing and the outer casing and configured to receive a pressure wave from the internal volume, wherein the outer casing is a continuous outer casing configured to separate the intermediate volume from the atmosphere, and wherein the inner casing includes a pressure relief valve configured to open in the direction of the intermediate volume when an overpressure occurs in the internal volume, the continuous outer casing configured to remain intact when the intermediate volume receives the pressure wave during the overpressure and to contain the pressure wave entirely within the intermediate volume.