The utility model relates to the technical field of
battery thermal management, and discloses a
battery thermal management device and a
battery pack, and the
battery thermal management device comprises a plurality of heat pipes, a
battery cell and a cooling piece. According to the battery
heat management device with the structure, in a cooling mode, a liquid working medium in the
evaporation section at the bottom of the
heat pipe is heated and evaporated into a gaseous working medium, the gaseous working medium rises to the condensation section at the top of the
heat pipe, the gaseous working medium is in contact with a low-temperature wall surface of the condensation section to be condensed into the liquid working medium, and the liquid working medium flows back to the condensation section at the bottom of the
heat pipe by gravity; and heat exchange circulation is achieved. The transition section, the condensation section and the
evaporation section of the heat
pipe are all in contact with the
battery cell, so that the heat exchange area is greatly increased, the heat exchange amount is increased, and the
cooling effect of the
battery cell can be remarkably improved. The
arrangement number of the cooling plates can be reduced, so that the arrangement of the cooling pipelines can be simplified, the occupied space of the cooling plates and the cooling pipelines can be reduced, and the volume
utilization rate and the
mass energy density of the battery thermal management device and the
battery pack can be improved.