초록 ▼

A battery cell bypass module comprises a sensor for detecting an operating condition of a battery cell such as voltage or temperature and a controller connected across the battery cell of a lithium ion battery, for example, and having a conductive mode and a normally non conductive mode. The control

A battery cell bypass module comprises a sensor for detecting an operating condition of a battery cell such as voltage or temperature and a controller connected across the battery cell of a lithium ion battery, for example, and having a conductive mode and a normally non conductive mode. The controller is operable to change to the conductive mode when an operating condition of the battery cell exceeds a predetermined value to thereby shunt current around the battery cell. The sensor may be a temperature transducer such as a thermistor for measuring battery cell temperature and a cell temperature comparator such as an operational amplifier is operable to generate a temperature excessive signal when the signal from the temperature transducer exceeds a predetermined value, the controller then being operable to change to the conductive mode and thereby shunt current around the battery cell. The sensor may also be a voltage comparator, also an operational amplifier, for measuring voltage across the cell, the controller being operable in response to a voltage excessive signal to change the controller to the conductive mode and thereby shunt current around the battery cell. The controller includes a voltage limiting operational amplifier operable for transmitting a voltage excessive output signal when the input thereto exceeds a predetermined value and a transistor having a predetermined gate voltage allowing bypass current flow, the transistor being responsive to the voltage excessive output signal from the voltage limiting operational amplifier to shunt current around the battery cell.

대표청구항 ▼

[ What is claimed is:] [15.] A battery cell bypass module comprising:sensing means for detecting an operating condition of a battery cell;controller means connected across the battery cell and having a conductive mode and a normally non conductive mode, said controller means being operable in respon

[ What is claimed is:] [15.] A battery cell bypass module comprising:sensing means for detecting an operating condition of a battery cell;controller means connected across the battery cell and having a conductive mode and a normally non conductive mode, said controller means being operable in response to an operating condition of the battery cell in excess of a predetermined magnitude to change to the conductive mode and thereby shunt current around the battery cell; anddiode means connected across the battery cell responsive to failure of the cell for shunting current flow around the cell.