Battery module, battery pack, and battery-powered apparatus

A battery module, characterized by comprising:

• a plurality of battery units arranged in a horizontal direction, wherein each battery unit comprises a plurality of batteries stacked in a vertical direction, the plurality of batteries comprise a first battery and a second battery stacked in a vertical direction, the first battery and the second battery each comprise a first electrode terminal, a second electrode terminal, and an explosion-proof piece located between the first electrode terminal and the second electrode terminal;
• and
• a busbar assembly, configured to electrically connect the plurality of battery units, wherein the busbar assembly comprises a first busbar connected to the first electrode terminal of the first battery and the second electrode terminal of the second battery, wherein
• in a first direction perpendicular to the vertical direction and the horizontal direction, the first busbar comprises a first weak zone that at least partially overlaps with the explosion-proof piece of the first battery, wherein the first weak zone is configured to fracture when the explosion-proof piece of the first battery is burst, to cause an open circuit between the first battery and the second battery.