Abstract: A battery pack includes an upper shell, a lower shell, a battery cell assembly, a circuit board and a first component. The lower shell is provided with a battery cavity, the battery cell assembly is disposed in the battery cavity, the circuit board is connected to the battery cell assembly, the circuit board is located between the upper shell and the lower shell, the first component is provided with a first through hole running through the first component, the first through hole is located between the circuit board and the battery cell assembly, and the first through hole communicates with external air.

Abstract: A method for manufacturing a battery module, including: disposing an adapting plate on a battery cell assembly, and connecting the adapting plate to tabs of the battery cell assembly; providing a fastening frame, where the fastening frame is provided with an accommodating cavity, and the accommodating cavity accommodates the adapting plate and at least part of the battery cell assembly; and providing a filler in a gap between the inner side of the accommodating cavity and the battery cell assembly and a gap between the inner side of the accommodating cavity and the adapting plate.

Abstract: A battery pack includes: a housing, in which an accommodation space is made available; a cell module, accommodated in the accommodation space, and including a plurality of stacked cells, each cell comprises a cell housing, a first tab and a second tab, and the tabs extend out of the accommodation space; an adapter board, disposed on the cell module, where the first tab and the second tab are welded onto the adapter board; a circuit board, where the circuit board is arranged adjacent to the adapter board; a first connecting strip, one end is connected to the first tab, another end is connected to a positive input end of the circuit board; and a second connecting strip, one end is connected to the second tab, another end of is connected to a negative input end of the circuit board.

Abstract: An electrochemical apparatus includes a housing, a circuit board, and a battery module, where the housing includes a cover and a bottom shell, and the cover and the bottom shell form an accommodating cavity; the circuit board is provided in the accommodating cavity, and the circuit board includes a first electrical connection portion; the battery module is accommodated in the accommodating cavity, and the battery module includes a second electrical connection portion; and a first fastening member is provided on an inner side of the bottom shell, and fastens the first electrical connection portion and the second electrical connection portion. With the electrochemical apparatus, short circuits caused by vibrations, extrusions, and frictions of internal structures of the unmanned aerial vehicle using such electrochemical apparatus can be reduced.