A system for preventing battery failure, comprising: a plurality of lithium ion electrochemical cells (105, 225), wherein each of the plurality of the lithium ion electrochemical cells (105, 225) is configured to generate electrical energy from chemical reactions, each of the plurality of the lithium ion electrochemical cells (105, 225) comprising a respective first end and a respective second end, wherein each respective first end comprises a respective vent, wherein each of said plurality of lithium ion electrochemical cells (105, 225) is aligned along parallel axes with each other of said plurality of lithium ion electrochemical cells (105, 225) with each said respective first end in a first direction, and each said respective second end in a second direction; a first bus electrically coupled to respective first electrodes of each of said plurality of lithium ion electrochemical cells (105, 225) at said respective first end; a second bus electrically coupled to respective second electrodes of each of said plurality of lithium ion electrochemical cells (105, 225) at said respective second end; and a diffuser plate (210, 305, 405) juxtaposed with said first bus at said respective first end, wherein the diffuser plate (210, 305, 405) is aligned with a plane normal to the parallel axes, the diffuser plate (210, 305, 405) comprising a first side facing the respective first ends and a second side facing away from the respective first ends, the diffuser plate (210, 305, 405) comprising channels for venting gases on said first side; characterized in that the diffuser plate (210, 305, 405) comprises multiple diverters (310, 410), each diverter (310, 410) located directly above a lithium ion electrochemical cell (105, 225), when the diffuser plate (210, 305, 405) is oriented above said plurality of lithium ion electrochemical cells (105, 225), each diverter (310, 410) comprising one or more arcs (315, 415) protruding from said first side and separated by one or more gaps (320, 420), the one or more gaps (320, 420) forming the channels for venting gases and arranged to divert vented gases in a direction that does not directly face any other neighboring lithium ion electrochemical cell (105, 225). a plurality of lithium ion electrochemical cells (105, 225), wherein each of the plurality of the lithium ion electrochemical cells (105, 225) is configured to generate electrical energy from chemical reactions, each of the plurality of the lithium ion electrochemical cells (105, 225) comprising a respective first end and a respective second end, wherein each respective first end comprises a respective vent, wherein each of said plurality of lithium ion electrochemical cells (105, 225) is aligned along parallel axes with each other of said plurality of lithium ion electrochemical cells (105, 225) with each said respective first end in a first direction, and each said respective second end in a second direction; a first bus electrically coupled to respective first electrodes of each of said plurality of lithium ion electrochemical cells (105, 225) at said respective first end; a second bus electrically coupled to respective second electrodes of each of said plurality of lithium ion electrochemical cells (105, 225) at said respective second end; and a diffuser plate (210, 305, 405) juxtaposed with said first bus at said respective first end, wherein the diffuser plate (210, 305, 405) is aligned with a plane normal to the parallel axes, the diffuser plate (210, 305, 405) comprising a first side facing the respective first ends and a second side facing away from the respective first ends, the diffuser plate (210, 305, 405) comprising channels for venting gases on said first side; characterized in that the diffuser plate (210, 305, 405) comprises multiple diverters (310, 410), each diverter (310, 410) located directly above a lithium ion electrochemical cell (105, 225), when the diffuser plate (210, 305, 405) is oriented above said plurality of lithium ion electrochemical cells (105, 225), each diverter (310, 410) comprising one or more arcs (315, 415) protruding from said first side and separated by one or more gaps (320, 420), the one or more gaps (320, 420) forming the channels for venting gases and arranged to divert vented gases in a direction that does not directly face any other neighboring lithium ion electrochemical cell (105, 225).