Electric vehicle battery heat management device integrating air cooling and liquid cooling

The embodiment of the invention discloses an electric vehicle battery heat management device integrating air cooling and liquid cooling. The electric vehicle battery heat management device comprises abox body and a plurality of rows of battery packs arranged in the box body, each row of battery pack consists of a plurality of single batteries; each single battery is embedded into a composite phase change material body; and the top and the bottom of the composite phase change material body are attached to a liquid cooling plate. The liquid cooling plate is connected with a water pump; the water pump is connected with a water tank; a heat dissipation plate is arranged between every two adjacent rows of battery packs; one end of the heat dissipation plate is embedded into the composite phasechange material body, and the other end of the heat dissipation plate is exposed in air in the box body; and the box body is provided with a heat dissipation fan used for carrying out heat exchange on the heat dissipation pla