Battery exhaust gas filter system and method of filtering exhaust gas from battery cell

The invention relates to a battery exhaust gas filter system and a method of filtering exhaust gas from a battery cell. A battery exhaust filter system is provided. The system includes a battery cell, an outer housing encapsulating the battery cell and including a housing vent, and an exhaust filter disposed on the housing vent and including a filter element, the filter element includes a first filter element portion operable to contain particulate matter of a first size and a second filter element portion operable to contain particulate matter of a second size that is relatively smaller than the particulate matter of the first size. 本发明涉及电池排气过滤器系统和过滤来自电池电芯的排气的方法。提供了电池排气过滤器系统。该系统包括电池电芯、封装电池电芯并且包括壳体通气口的外部壳体和设置在壳体通气口上并且包括过滤器元件的排气过滤器，过滤器元件包括可操作以包含第一尺寸的颗粒物的第一过滤器元件部分和可操作以包含比第一尺寸的颗粒物相对更小的第二尺寸的颗粒物的第二过滤器元件部分。