A quick-swap support frame assembly, the quick-swap support frame assembly comprises a quick-swap support frame and a locking mechanism, the locking mechanism is fixed on the quick-swap support frame; the locking mechanism is used for a battery pack, the locking mechanism comprises: a lock base, the lock base is provided with an opening and a cavity extending from the opening, the opening is used for allowing a lock shaft mounted on the battery pack to enter the cavity; a lock tongue, the lock tongue is rotatable relative to the lock base so as to shift between an unlocked state and a locked state, the lock tongue comprises a lock tongue body and a lock tongue extension part that are fixedly connected, the lock tongue extension part is located outside the lock base, when the lock tongue is in the locked state, the lock tongue body is able to stop the lock shaft from leaving the cavity via the opening; and a resetting part, the resetting part is provided on the lock base and acts on the lock tongue, the resetting part is capable of producing a flexible distension and used to cause the lock tongue to rotate in a locking direction so as to reset from the unlocked state to the locked state; characterized in that, the quick-swap support frame assembly further comprises a primary locking mechanism, the primary locking mechanism comprises a lock connecting rod, at least one primary lock tongues, and at least one primary lock bases, the primary lock base is fixed on the quick-swap support frame, the primary lock base is provided with a primary opening and a primary cavity extending from the primary opening, the primary opening is used for a primary lock shaft mounted on the battery pack to enter the primary cavity, the lock connecting rod is rotatably connected with at least one of the primary lock tongues, and is used to drive the primary lock tongue to rotate under the action of external force, so that the primary lock tongue is able to rotate relative to the primary lock base to change between a primary unlocked state and a primary locked state, when the primary lock tongue is in the primary locking state, the primary lock tongue is able to stop the primary lock shaft from leaving the primary cavity via the primary opening. the locking mechanism is used for a battery pack, the locking mechanism comprises: a lock base, the lock base is provided with an opening and a cavity extending from the opening, the opening is used for allowing a lock shaft mounted on the battery pack to enter the cavity; a lock tongue, the lock tongue is rotatable relative to the lock base so as to shift between an unlocked state and a locked state, the lock tongue comprises a lock tongue body and a lock tongue extension part that are fixedly connected, a lock base, the lock base is provided with an opening and a cavity extending from the opening, the opening is used for allowing a lock shaft mounted on the battery pack to enter the cavity; a lock tongue, the lock tongue is rotatable relative to the lock base so as to shift between an unlocked state and a locked state, the lock tongue comprises a lock tongue body and a lock tongue extension part that are fixedly connected, the lock tongue extension part is located outside the lock base, when the lock tongue is in the locked state, the lock tongue body is able to stop the lock shaft from leaving the cavity via the opening; and a resetting part, the resetting part is provided on the lock base and acts on the lock tongue, the resetting part is capable of producing a flexible distension and used to cause the lock tongue to rotate in a locking direction so as to reset from the unlocked state to the locked state; characterized in that, the quick-swap support frame assembly further comprises a primary locking mechanism, the primary locking mechanism comprises a lock connecting rod, at least one primary lock tongues, and at least one primary lock bases, the primary lock base is fixed on the quick-swap support frame, the primary lock base is provided with a primary opening and a primary cavity extending from the primary opening, the primary opening is used for a primary lock shaft mounted on the battery pack to enter the primary cavity, the lock connecting rod is rotatably connected with at least one of the primary lock tongues, and is used to drive the primary lock tongue to rotate under the action of external force, so that the primary lock tongue is able to rotate relative to the primary lock base to change between a primary unlocked state and a primary locked state, when the primary lock tongue is in the primary locking state, the primary lock tongue is able to stop the primary lock shaft from leaving the primary cavity via the primary opening.