Abstract: A device for assembly and disassembly is provided. The device includes a support assembly, a bearing assembly, and a latching assembly. The support assembly includes a first support member and a locking assembly, the locking assembly includes a locking driver and a locking connection structure, and the locking connection structure is configured to support a negative pressure assembly. The latching assembly includes a first connection structure, a second connection structure, and a movable connection structure, wherein the first connection structure is latched with the second connection structure through the movable connection structure. The locking connection structure is separated from the negative pressure assembly while the movable connection structure is latched with the second connection structure, or the locking connection structure is connected to the negative pressure assembly while the movable connection structure is unlatched from the second connection structure.

Abstract: A series formation system includes a power module and at least two formation modules electrically connected to the power module in series. The at least two formation modules are connected in series. The power module is configured to supply power to the formation modules. Each of the formation modules includes a battery cell and a formation control circuit connected between the power module and the battery cell. The formation control circuit is configured to control the each of the formation modules to work in one of: a constant current charging mode in which a current flowing through the battery cell is substantially constant, and a constant voltage charging mode in which a voltage across the battery cell is substantially constant.

Abstract: A series formation system is provided. The series formation system includes at least two formation modules and a power module. The power module is connected in series with the at least two formation modules. The at least two formation modules are connected in series. The power module is configured to supply power to the at least two formation modules. Each of the formation modules includes a battery cell and a formation control circuit. The formation control circuit is electrically connected to the battery cell. The formation control circuit is configured to control a voltage or a current provided by the power module to the battery cell, so that the battery cell is switched between a constant current charging mode and a constant voltage charging mode.

Abstract: A series formation system is provided. The series formation system includes at least two formation modules and a power module. The power module is connected in series with the at least two formation modules. The at least two formation modules are connected in series. The power module is configured to supply power to the at least two formation modules. Each of the formation modules includes a battery cell and a formation control circuit. The formation control circuit is electrically connected to the battery cell. The formation control circuit is configured to control a voltage or a current provided by the power module to the battery cell, so that the battery cell is switched between a constant current charging mode and a constant voltage charging mode.