| 摘要 |
A multi-cell protection circuit and method. The multi-cell protection circuit comprises one or more multi-cell protection chips, a charge control switch (M2) and a discharge control switch (M1). Each multi-cell protection chip comprises a multi-cell protection integrated circuit module and an expansion connection module. The input terminals (VC1, VC2, VC3, GND1, VC4, VC5, VC6, VC7, GND) of the multi-cell protection integrated circuit module are connected to the positive and negative poles of corresponding cells. The output terminals (co, do) of the multi-cell protection integrated circuit module are connected to the interior signal input terminals (Dco, Ddo) of the expansion connection module. The expansion signal input terminals (exterior.co, exterior.do) of the expansion connection module are connected to expansion signal output terminals (Co′, Do′) of an expansion connection module in a multi-cell protection chip adjacent to this multi-cell protection chip. The output terminals (Co′, Do′) of the expansion connection module in the last multi-cell protection chip among the multi-cell protection chips connected in the multi-cell protection circuit are connected to the charge control switch and the discharge control switch, respectively.
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