A series formation system configured for battery formation, the series formation system comprises: a power module and at least two formation modules, wherein the power module is connected to the at least two formation modules in series, the at least two formation modules are connected to each other in series, and the power module is configured to supply power to the at least two formation modules; wherein each of the formation modules comprises: a formation control circuit and a battery cell, a power input end, and a power output end; wherein the formation control circuit comprises: a switch module; characterized in that the formation control circuit further comprises: a first filter module, a current limiting module, and a second filter module; wherein one end of the first filter module is electrically connected to the power input end, and another end of the first filter module is electrically connected to the power output end; wherein one end of the current limiting module is electrically connected to the power input end, and another end of the current limiting module is electrically connected to the switch module; wherein one end of the second filter module is electrically connected to the switch module, and another end of the second filter module is electrically connected to the power output end; wherein one end of the battery cell is electrically connected to the switch module, and another end of the battery cell is electrically connected to the power output end; wherein the switch module is electrically connected to the power output end; wherein the formation control circuit is configured to control a voltage applied by the power module to the battery cell or to control a current provided by the power module to flow through the battery cell, so that the battery cell is switched between a constant current charging mode and a constant voltage charging mode; wherein during a formation process, the battery cell in the at least two formation modules with a voltage value lower than a preset voltage value is in the constant current charging mode, and the battery cell with a voltage value higher than or equal to the preset voltage value is in the constant voltage charging mode; and wherein the switch module comprises at least a first state and a second state, wherein in the first state, a current is configured to flow from the power input end through the current limiting module, the switch module, and the power output end in turn, and wherein in the second state, a current is configured to flow from the power input end through the current limiting module, the switch module, the battery cell, and the power output end in turn. wherein the power module is connected to the at least two formation modules in series, the at least two formation modules are connected to each other in series, and the power module is configured to supply power to the at least two formation modules; wherein each of the formation modules comprises: a formation control circuit and a battery cell, a power input end, and a power output end; wherein the formation control circuit comprises: a switch module; characterized in that the formation control circuit further comprises: a first filter module, a current limiting module, and a second filter module; characterized in that the formation control circuit further comprises: a first filter module, a current limiting module, and a second filter module; wherein one end of the first filter module is electrically connected to the power input end, and another end of the first filter module is electrically connected to the power output end; wherein one end of the current limiting module is electrically connected to the power input end, and another end of the current limiting module is electrically connected to the switch module; wherein one end of the second filter module is electrically connected to the switch module, and another end of the second filter module is electrically connected to the power output end; wherein one end of the battery cell is electrically connected to the switch module, and another end of the battery cell is electrically connected to the power output end; wherein the switch module is electrically connected to the power output end; wherein the formation control circuit is configured to control a voltage applied by the power module to the battery cell or to control a current provided by the power module to flow through the battery cell, so that the battery cell is switched between a constant current charging mode and a constant voltage charging mode; wherein during a formation process, the battery cell in the at least two formation modules with a voltage value lower than a preset voltage value is in the constant current charging mode, and the battery cell with a voltage value higher than or equal to the preset voltage value is in the constant voltage charging mode; and wherein the switch module comprises at least a first state and a second state, wherein in the first state, a current is configured to flow from the power input end through the current limiting module, the switch module, and the power output end in turn, and wherein in the second state, a current is configured to flow from the power input end through the current limiting module, the switch module, the battery cell, and the power output end in turn.