Heating tray for vacuum hopper precharger

A heating tray for a vacuum hopper precharger for discharging an electrolyte of a secondary battery mounted on the heating tray and gas contained in the electrolyte to the outside, and supplying the electrolyte to the inside of the secondary battery, the heating tray comprising:

• a base frame;
• an upper plate which is coupled to an upper portion of the base frame;
• at least one heating part which is coupled to an upper portion of the upper plate;
• and
• a mounting part which is located on the upper portion of the at least one heating part and has a plurality of mounting grooves arranged in a plurality of columns or rows, each mounting groove of the plurality of mounting grooves being configured to accommodate the secondary battery,
• wherein the base frame has formed therein a cable duct in which a cable connected to the at least one heating part is located,
• wherein a plurality of plates are arranged in an inner space of the base frame,
• wherein the plates are spaced apart from each other to form a space, and
• wherein the space defines the cable duct and the cable of the cable duct is arranged in the space.