A power charging device with charge saturation disconnector through electromagnetic force release, comprising: a magnetic circuit comprising a magnetic actuator conductive device; the magnetic actuator conductive device comprising an electromagnetic actuator within a space for installing a rechargeable discharge device; the electromagnetic actuator comprising power excitation windings, a magnetic circuit comprising an iron-core, a magnetic driving structure, a conductive device and a prestressing spring; wherein when the power excitation windings are powered by means of an electrical current passing through the power excitation windings, they cause the conductive device to clamp with and charge a rechargeable discharge device installed within said space, and wherein the power charging device is arranged to detect charging saturation, and upon detection of charging saturation the current passing through the power excitation windings decreases or terminates, the magnetic driving structure returns to its original position through the prestressing of the prestressing spring causing the conductive device to release the clamped rechargeable discharge device, disconnecting the conductive device and stopping charging; wherein the charge current decreases or terminates when charge saturation occurs; wherein when a rechargeable discharge device is installed in said space, the conductive device causes electical current to pass through the power excitation windings, the electromagnetic actuator is attracted by excitation to drive the magnetic driving structure of the magnetic actuator conductive device and the conductive device integrated with the magnetic driving structure to produce the clamping force and charging current; and wherein when an installed rechargeable discharge device is charged, the voltage thereof gradually rises and the charge current decreases, further causing the electrical current passing through the power excitation windings to decrease, or when the current passing through the power excitation windings is terminated through the control of the charging control device, the excitation of the electromagnetic actuator is terminated, and by means of the prestressing provided by the prestressing spring, the magnetic driving structure and the conductive device integrated with the magnetic driving structure release the installed rechargeable discharge device. a magnetic circuit comprising a magnetic actuator conductive device; the magnetic actuator conductive device comprising an electromagnetic actuator within a space for installing a rechargeable discharge device; the electromagnetic actuator comprising power excitation windings, a magnetic circuit comprising an iron-core, a magnetic driving structure, a conductive device and a prestressing spring; wherein when the power excitation windings are powered by means of an electrical current passing through the power excitation windings, they cause the conductive device to clamp with and charge a rechargeable discharge device installed within said space, and wherein the power charging device is arranged to detect charging saturation, and upon detection of charging saturation the current passing through the power excitation windings decreases or terminates, the magnetic driving structure returns to its original position through the prestressing of the prestressing spring causing the conductive device to release the clamped rechargeable discharge device, disconnecting the conductive device and stopping charging; wherein the charge current decreases or terminates when charge saturation occurs; wherein when a rechargeable discharge device is installed in said space, the conductive device causes electical current to pass through the power excitation windings, the electromagnetic actuator is attracted by excitation to drive the magnetic driving structure of the magnetic actuator conductive device and the conductive device integrated with the magnetic driving structure to produce the clamping force and charging current; and wherein when an installed rechargeable discharge device is charged, the voltage thereof gradually rises and the charge current decreases, further causing the electrical current passing through the power excitation windings to decrease, or when the current passing through the power excitation windings is terminated through the control of the charging control device, the excitation of the electromagnetic actuator is terminated, and by means of the prestressing provided by the prestressing spring, the magnetic driving structure and the conductive device integrated with the magnetic driving structure release the installed rechargeable discharge device.