Industrial Technology Research Institute

Chun-Hung Chou

Chein-Chung Sun

Chi-Hua Chen

Deng-Tswen Shieh

Che-Wei Chu

A battery system, a control method of a cell balance procedure and a calculation method of a balance charge capacity are provided. The battery system includes a plurality of battery units, a communication bus and a host control unit. Each battery unit includes a plurality of cells, an isolated charger, a switch array circuit, a balance slave switch and a balance slave controller. The host control unit includes a balance host controller, a balance host switch and a system current measurement unit. When the error between a balance detection voltage calculated by each balance slave controller and the balance detection voltage calculated by the balance host controller is less than a predetermined value, the balance host switch and the corresponding balance slave switches are in conduction and the specified plurality cells of battery system are charged for keeping cell balance purpose.

Battery system, control method of cell balance procedure, and calculation method of balance charge capacity

A battery safety identifying method is provided. The method includes the following steps. A voltage drop and a voltage drop rate are detected when a battery is abnormal. A duration time of the voltage drop and a voltage recovery ratio are detected when the battery is abnormal. A surface temperature or a temperature rise rate is detected when the battery is abnormal. A plurality of hazard levels of battery abnormality and at least one protection mechanism are set according to the voltage drop, the voltage drop rate, the voltage recovery ratio and the surface temperature or the temperature rise rate.

Battery safety identifying method and method for setting hazard levels of battery internal short circuit and warning system using the same

A battery system includes a unit battery module, a current and coulomb measurement circuit and a master control circuit. The unit battery module stores electricity and calculates battery information of the battery set according to a system current value, a system coulomb value, a cell voltage and a cell temperature of the battery set. The current and coulomb measurement circuit is coupled to the unit battery module, generates the system current value according to the current flowing though the battery set, generates the system coulomb value by integrating the system current value, and provides the system current value and the system coulomb value to the unit battery module. The master control circuit is coupled to the unit battery module, receives the battery information from the unit battery module, generates a system battery information according to the battery information and provides the system battery information to an external device.

Battery management system and battery system using the same

A battery management system is provided, which may include a power supply module, a measurement module, a switch module and a processing module. The power supply module may be electrically coupled to a load or a charging power source via the switch module. The measurement module may measure a plurality of operation signals from the power supply module. The processing module may determine the operation status of the power supply module by cross comparison between the operation signals, and activate a safety protection item according to the operations signals and the operation status; the processing module may determine to activate a global protection process to turn off the switch module or activate a local protection process to turn off the switch module after a buffer time according to the danger level of the safety protection item.

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Tainan, Taiwan

Chun-Hung Chou