METHOD FOR PROCESSING FAILED BATTERY UNIT, BATTERY MODULE, BATTERY PACK, AND DEVICE

A failed battery cell (11) handling method, a battery module (M2), a battery pack (M), and a device (D), which relates to the technical field of energy devices. The handling method includes: injecting a conductive material into a failed battery cell (11), where the conductive material is in a molten state when being injected, and is in a solid state after cooling, and the conductive material is configured to electrically connect a positive terminal and a negative terminal of the failed battery cell. In the failed battery cell (11) handling method according to this application, the conductive material that is configured to electrically connect the positive terminal (113) and the negative terminal (114) is injected into the failed battery cell (11). The conductive material is in the molten state when being injected and is in the solid state after cooling, so that the failed battery cell (11) is short-circuited. This simplifies a maintenance process of the battery module (M2), reduces maintenance cost, and improves working efficiency of the battery module (M2).