초록 ▼

A battery management system for management and control of a plurality of rechargeable batteries connected in series. A programmed central processing unit communicates with a plurality of battery modules and a bulk charger. Each of the battery modules includes a rechargeable battery, a sensor node in

A battery management system for management and control of a plurality of rechargeable batteries connected in series. A programmed central processing unit communicates with a plurality of battery modules and a bulk charger. Each of the battery modules includes a rechargeable battery, a sensor node including a plurality of battery sensors and a microcontroller that processes signals generated by the battery sensors, and a direct current charger. During a charging cycle the bulk charger provides a variable bulk charging current to the rechargeable batteries connected in series and each of the rechargeable batteries receive a charging current from individual direct current chargers positioned at each rechargeable battery. During the charging cycle, the voltage and temperature of the rechargeable batteries are monitored by the programmed central processing unit by means of the sensor nodes and the bulk charging current reduced by one half when any battery voltage reaches a predetermined clamping voltage. Once the bulk charging current is reduced to approximately 1 to 2 percent of the 3-hour discharge capacity for the rechargeable batteries, the bulk charger is turned off and the direct current chargers finish each battery charge independently.

대표청구항 ▼

A method for monitoring a rechargeable battery comprising: monitoring a temperature of said rechargeable battery; monitoring a voltage of said rechargeable battery; incrementing a high temperature second counter when said monitored temperature exceeds a predetermined maximum temperature for a predet

A method for monitoring a rechargeable battery comprising: monitoring a temperature of said rechargeable battery; monitoring a voltage of said rechargeable battery; incrementing a high temperature second counter when said monitored temperature exceeds a predetermined maximum temperature for a predetermined time interval; incrementing a low temperature second counter when said monitored temperature is less than a predetermined minimum temperature for a predetermined time interval; incrementing a high voltage second counter when said monitored voltage exceeds a predetermined clamping voltage for a predetermined time interval; incrementing a low voltage second counter when said monitored voltage is less than a predetermined minimum voltage for a predetermined time interval; and storing said high temperature second counter, said low temperature second counter, said high voltage second counter, and said low voltage second counter in a memory.