The invention discloses a lithium supplement agent, a preparation method thereof, an electrochemical device, and an electronic device. The lithium supplement includes a component A and a component B; a general chemical formula of the component A is: Li6-xM...

Disclosed are a battery module and an electrical device including the battery module. The battery module includes: a battery cell array (100), a side plate (200) and an insulation barrier (201). The side plate (200) is arranged corresponding to at least on...