Battery, electric device, manufacturing method and manufacturing system for battery

A battery, comprising:

• a battery module comprising an explosion-proof assembly;
• a casing, which is configured to accommodate the battery module, the casing comprising a gas discharge passage, and the gas discharge passage comprising a gas inlet and a gas outlet;
• a flow guide member, which is disposed inside the casing and shields the explosion-proof assembly to form a gas guide passage, the gas guide passage being in communication with the gas inlet, for guiding gas generated by the battery module to an exterior of the casing through the gas outlet after the explosion-proof assembly is destroyed, wherein:
• the casing comprises a cover and a housing for accommodating the battery module, the housing comprises two side plates to which the cover is connected;
• an accommodating portion is formed at a connection position between the cover and one of the two side plates, the gas discharge passage is disposed in the one of the two side plates, and the gas inlet of the gas discharge passage is in communication with the accommodating portion;
• and
• the one of the two side plates comprises an upper portion, a first side portion, and a second side portion, the first side portion and the second side portion are each connected to the upper portion and are spaced apart from each other in a thickness direction of the one of the two side plates, the second side portion is disposed away from the battery module relative to the first side portion, the gas inlet of the gas discharge passage is disposed to penetrate the upper portion, and the gas outlet of the gas discharge passage is disposed to penetrate the second side portion;
• and
• the accommodating portion is formed above the gas inlet of the gas discharge passage and communicates the gas guide passage with the gas inlet of the gas discharge passage such that a gas exchange between the gas guide passage and the gas inlet of the gas discharge passage occurs at the accommodating portion.