Movable heating furnace for testing sodium-nickel battery string

A movable heating furnace for testing a sodium-nickel battery string comprises a lower furnace body assembly and a furnace cover assembly covering the lower furnace body assembly, a fireproof fiber bag is installed between the lower furnace body assembly and the furnace cover assembly, the lower furnace body assembly comprises a lower furnace body outer box, an inner cavity for containing the battery string is installed in the lower furnace body outer box, and the lower furnace body outer box is provided with an inner cavity for containing the battery string. The two sides of the inner cavity are provided with heating modules used for heating. Each single cell of the cell string is electrically connected with a signal acquisition module used for voltage and current acquisition when the single cell is tested. An external power supply interface module electrically connected with an external furnace temperature control cabinet is further mounted on the lower furnace body outer box; the external power supply inte