The invention relates to the field of
energy storage device, in particular to a
power battery module. The
power battery module comprises a module housing, a cooling
system, a plurality of cells and
thermal runaway preventing structures, wherein the plurality of cells are regularly arranged in the module housing in parallel; the cooling
system is arranged on the module housing; one
thermal runaway preventing structure is arranged between two adjacent cells; each
thermal runaway preventing structure comprises two heat-conducting
layers and a thermal insulating layer; every heat-conducting
layers are stacked at two sides of each thermal insulating layer respectively, and are connected with the cooling
system; and the heat-conducting
layers can transmit the heat on the side surface of the adjacent
cell to the cooling system. According to the
power battery module provided by the invention, one thermal runaway preventing structure is arranged between two adjacent cells; the heat between the two adjacent cells can be insulated; meanwhile, the heat on the side surfaces of the cells is timely transferred to the cooling system; and heat accumulation on the side surfaces of the cells is prevented, so that the
potential risk of thermal runaway between the cells is lowered.