Abstract: A compulsory charging and protective circuit for secondary battery after being over discharged is disclosed. The circuit includes a circuit conducting switch, a releasing unit, a triggering unit and a comparing unit. When the secondary battery is over discharged, a temporary electrical connection is provided by the present invention. The loop of the secondary battery and a charger keeps. When the secondary battery recovers from abnormal status, the temporary electrical connection is called off so that the secondary battery can keep normal operation. Thus, when the secondary battery is under over-discharge, it doesn't have to be unloaded for repair to settle the issue. Maintenance costs can be saved.

Abstract: A compulsory charging and protective circuit for secondary battery after being over discharged is disclosed. The circuit includes a circuit conducting switch, a releasing unit, a triggering unit and a comparing unit. When the secondary battery is over discharged, a temporary electrical connection is provided by the present invention. The loop of the secondary battery and a charger keeps. When the secondary battery recovers from abnormal status, the temporary electrical connection is called off so that the secondary battery can keep normal operation. Thus, when the secondary battery is under over-discharge, it doesn't have to be unloaded for repair to settle the issue. Maintenance costs can be saved.

Abstract: A charger and charging method for rechargeable batteries are disclosed. The charging method includes steps of: setting an exceeding amount regarding a battery information; continuously receiving the battery information from a battery management system in each rechargeable battery; continuously sorting values of the battery information from every battery management units; charging the rechargeable battery having the minimal value of the battery information; stopping charging the rechargeable battery when the latest value of the battery information of the rechargeable battery under charge becomes maximum and exceeds the value of the battery information of the rechargeable battery ranked second up to the exceeding amount; and charging the rechargeable battery having the minimal value of the battery information in the latest sorting.

Abstract: A multi-functioned smart switching charger with time stage control is disclosed. The switching charger includes: a charging device, several output units, a switch control unit and a charging control unit. The charging device outputs direct current only to one output unit per charging until the rechargeable battery under charging is fully charged. The present invention provides a switching charger which utilizes only a charging device to charge connected rechargeable batteries sequentially. It saves material cost and space used. Meanwhile, charging time can be set up to off-peak hours. Power cost for charging can be saved.

Abstract: A charging device with a battery management system which remains a rechargeable battery in full capacity during standby after being fully charged is disclosed. The charging device includes a charging module, electrically connected to a power source, for charging the rechargeable battery; a voltage detecting module, for detecting a voltage of the rechargeable battery; and a determination module, for instructing the charging module to charge the rechargeable battery with a supplementary current, when the voltage of the rechargeable battery detected by the voltage detecting module reduces to a first predetermined voltage, until the voltage of the rechargeable battery reaches a second predetermined voltage. A reduction of the voltage of the rechargeable battery is due to self-discharge of the rechargeable battery during standby after being fully charged.

Abstract: A charging system for an electric vehicle is disclosed in the present invention. It includes a rechargeable battery module, a motor driver, a power switch, and a control circuit. The motor driver stops outputting electric power from the rechargeable battery when the control signal from the control circuit is received and keeps outputting electric power from the rechargeable battery when the control signal doesn't exit. The design of the present invention is in a series connection. It can not only be charged simultaneously, but also control the drive motor to stop running. Danger of hard acceleration of the motor due to charge can be avoided.

Abstract: A charging system for an electric vehicle is disclosed in the present invention. It includes a rechargeable battery module, a motor driver, a power switch, and a control circuit. The motor driver stops outputting electric power from the rechargeable battery when the control signal from the control circuit is received and keeps outputting electric power from the rechargeable battery when the control signal doesn't exit. The design of the present invention is in a series connection. It can not only be charged simultaneously, but also control the drive motor to stop running. Danger of hard acceleration of the motor due to charge can be avoided.

Abstract: A charging device with battery management system which remains a rechargeable battery in full capacity during standby after being fully charged is disclosed. The charging device includes a charging module, electrically connected to a power source, for charging the rechargeable battery; a voltage detecting module, for detecting a voltage of the rechargeable battery; and a determination module, for instructing the charging module to charge the rechargeable battery with a supplementary current when the voltage of the rechargeable battery detected by the voltage detecting module reduces to a first predetermined voltage until the voltage of the rechargeable battery reaches a second predetermined voltage. Reduce of the voltage of the rechargeable battery is due to self-discharge of the rechargeable battery during standby after being fully charged.