The invention discloses a heat dissipation device of a
new energy automobile battery and a heat dissipation method thereof. The heat dissipation device comprises a bottom plate, wherein a fixing mechanism is arranged on the upper surface of the bottom plate, a shell mechanism is arranged at the top end of a fixing frame,
water cooling mechanisms are arranged on one side and an inner cavity of the shell mechanism, protection mechanisms are arranged on the two sides of a
battery cell body, a positioning mechanism is arranged at the bottom part of the
battery cell body, a plurality of
air cooling mechanisms are arranged in an inner cavity of the fixing frame, fixing plates are arranged on the two sides of each
air cooling mechanism, and three fixing bolts are arranged on the two sides of the upper surface of the bottom plate. According to the invention, the arrangement mode that the
water cooling mechanism and the
air cooling mechanism are matched with each other is utilized, so that cold water in the
cooling pipe flows downwards and circulates among the
battery cell bodies to facilitate heat dissipation of the automobile battery, and air is blown upwards to the battery
cell bodies through fan blades to enable hot air to be dissipated upwards from a heat dissipation net; and the
water cooling mechanism and the air cooling mechanism can be conveniently matched for heat dissipation in
severe weather, so that the heat dissipation efficiency of the battery is higher.