| 摘要 |
A circuit for monitoring a rechargeable battery to provide an early warning of the failure of a cell of the battery includes a plurality of stacks (10, 12: 10', 12': 10'', 12'') connected in parallel. Each of the plurality of parallel connected stacks have first and second ends and include either plural cells (14a-d, 16a-d) connected in series or one cell. The circuit is characterized by means (40: 40': 40'') for sensing a difference in an electrical condition between two of the pluralities of parallel connected stacks in the battery to be monitored, and means for providing a fault signal when the difference in the electrical condition deviates from a predetermined standard by more than a preselected threshold. The circuit is either characterized in that the means (40: 40': 40'') for sensing a difference in an electrical condition includes voltage difference means (172, 174) for detecting a difference in voltage between a first point (20: 20') intermediate the ends of one stack (10: 10') in the battery to be monitored and a second point (26: 26') intermediate the ends of another stack (12: 12') in the battery to be monitored. In another embodiment, the circuit is characterized in that the means (40'') for sensing a difference in an electrical condition includes current difference means (40'') for detecting a difference in current between one stack (10'') in the battery to be monitored and another stack (12'') in the battery to be monitored. |
