Abstract: Provided are a spacer for a battery cell, a battery cell, a battery pack, and a vehicle. The spacer includes a spacer body having an accommodation groove. The accommodation groove has a gap formed at a bottom wall of the accommodation groove. The gap is in communication with the accommodation groove. The gap is adapted for a tab of the battery cell to pass through the gap to enable the tab to be partially accommodated in the accommodation groove. The spacer body has a width D, and the gap has a width d, where 3*d?2*D.

Abstract: Provided are a top cover for a battery, and a battery. The top cover for a battery includes a body; and a pole riveting block and a plurality of pole bodies, where the plurality of poles bodies are arranged on the body, and the plurality of poles bodies are connected to the pole riveting block.

Abstract: The present application relates to the technical field of lithium battery structures, in particular to a polished aluminum sheet for a lithium battery, a top cover, and a lithium battery. The polished aluminum sheet for a lithium battery comprises: a polished aluminum sheet body provided with an explosion-proof hole suitable for mounting an explosion-proof valve therein; a first reinforcing portion protruding or recessed from one surface of the polished aluminum sheet body and continuously or discontinuously surrounding the explosion-proof hole, the first reinforcing portion being spaced apart from the explosion-proof hole; and a second reinforcing portion protruding or recessed from the other surface of the polished aluminum sheet body and continuously or discontinuously surrounding the explosion-proof hole, the second reinforcing portion being spaced apart from the explosion-proof hole.

Abstract: The present application relates to the technical field of batteries, and provides a lithium battery and a method for preparing a lithium battery.

Abstract: The present application relates to the technical field of lithium battery assembling, and discloses a battery and an assembling method thereof. The battery includes: a cell assembly, two ends of the cell assembly being provided with a positive electrode and a negative electrode respectively; a casing, two ends of the casing being formed as an open end and a rolled edge stop end respectively, the cell assembly extending into the casing from the open end, and the end of the cell assembly with the positive electrode being constrained and stopped at the rolled edge stop end; and a negative electrode connection piece, covering the open end, the negative electrode connection piece being a conductive piece electrically connected to the negative electrode and a casing part of the open end respectively by means of laser welding spots.