A charging device (200; 300) comprising: an input unit configured to receive a control signal indicating that a power applied to the charging device (200; 300) is a process power, the process power being used to supply a test signal for inspecting characteristics of each component of a terminal set (220; 320); and a switch (201; 301); wherein the charging device is configured to connect to a battery (210; 310) and determine whether the power applied to the terminal set (220; 320) is the process power or a charging power according to whether the control signal is received; and wherein the switch is configured to: if the control signal is received, determine that the power applied to the charging device (200; 300) is the process power; and cut off a path between the terminal set (220; 320) and the battery (210; 310); if the control signal is not received, and during initialization of the charging device (100; 200; 300), determine that the power applied to the charging device (200; 300) is the charging power and temporarily cut off the path between the terminal set (220; 320) and the battery (210; 310), and temporarily supply the charging power to the terminal set (220; 320), if the control signal is not received and the initialization of the charging device (100; 200; 300) is completed, determine that the power applied to the charging device (200; 300) is the charging power and connect the path between the terminal set (220; 320) and the battery (210; 310) to supply the charging power to the battery (210; 310), wherein the switch (201; 301) is an internal switch of the charging device (200; 300), wherein the process power is directly applied to the terminal set (220; 320), and wherein one side of the switch (201; 301) is configured to be connected to the battery (210; 310) and another side of the switch (201; 301) is configured to be connected to the terminal set (220; 320). an input unit configured to receive a control signal indicating that a power applied to the charging device (200; 300) is a process power, the process power being used to supply a test signal for inspecting characteristics of each component of a terminal set (220; 320); and a switch (201; 301); wherein the charging device is configured to connect to a battery (210; 310) and determine whether the power applied to the terminal set (220; 320) is the process power or a charging power according to whether the control signal is received; and wherein the switch is configured to: if the control signal is received, determine that the power applied to the charging device (200; 300) is the process power; and cut off a path between the terminal set (220; 320) and the battery (210; 310); if the control signal is not received, and during initialization of the charging device (100; 200; 300), determine that the power applied to the charging device (200; 300) is the charging power and temporarily cut off the path between the terminal set (220; 320) and the battery (210; 310), and temporarily supply the charging power to the terminal set (220; 320), if the control signal is not received and the initialization of the charging device (100; 200; 300) is completed, determine that the power applied to the charging device (200; 300) is the charging power and connect the path between the terminal set (220; 320) and the battery (210; 310) to supply the charging power to the battery (210; 310), wherein the switch (201; 301) is an internal switch of the charging device (200; 300), wherein the process power is directly applied to the terminal set (220; 320), and wherein one side of the switch (201; 301) is configured to be connected to the battery (210; 310) and another side of the switch (201; 301) is configured to be connected to the terminal set (220; 320). if the control signal is received, determine that the power applied to the charging device (200; 300) is the process power; and cut off a path between the terminal set (220; 320) and the battery (210; 310); if the control signal is not received, and during initialization of the charging device (100; 200; 300), determine that the power applied to the charging device (200; 300) is the charging power and temporarily cut off the path between the terminal set (220; 320) and the battery (210; 310), and temporarily supply the charging power to the terminal set (220; 320), if the control signal is not received and the initialization of the charging device (100; 200; 300) is completed, determine that the power applied to the charging device (200; 300) is the charging power and connect the path between the terminal set (220; 320) and the battery (210; 310) to supply the charging power to the battery (210; 310), wherein the switch (201; 301) is an internal switch of the charging device (200; 300), wherein the process power is directly applied to the terminal set (220; 320), and wherein one side of the switch (201; 301) is configured to be connected to the battery (210; 310) and another side of the switch (201; 301) is configured to be connected to the terminal set (220; 320).