Battery monitor apparatus
AssigneeFujitsu Limited
InventorKazunobu Koga
Life of this patent
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Abstract
A battery monitor apparatus for monitoring the voltage of each cell of a battery pack including a plurality of cells is disclosed, in which each cell of the battery pack having the plurality of cells is connected to a capacitor by a switch, so that the cell voltage is retrieved and measured, and the current is detected, thereby making it possible to control the charge/discharge of each cell. This apparatus includes a capacitor, a switch group for connecting the ends of an arbitrary one of the cells constituting the battery pack or the ends of an arbitrary plurality of the cells to the capacitor thereby to retrieve the voltage of one cell or a plurality of the cells, and a detector for detecting the voltage of the capacitor.
Claims19
A battery monitor apparatus for monitoring at least the voltage of each cell of a battery pack including a plurality of cells, comprising:
- a capacitor;
- a group of switches for connecting the ends of one arbitrary cell or the ends of a plural cells fewer in number than all the cells constituting said battery pack to said capacitor and retrieving the voltage of said one cell or said plural cells;
- and
- a detector for detecting the voltage of said capacitor.
A battery monitor apparatus for monitoring at least the voltage of each cell of a battery pack including a plurality of cells, comprising:
- a capacitor;
- a group of switches for connecting the ends of an arbitrary single cell or the ends of a plural cells fewer in number than all the cells constituting said battery pack to said capacitor and retrieving the voltage of said single cell or said plural cells;
- a comparator circuit for comparing the voltage of said capacitor with a predetermined reference voltage and detecting the normal state, the over-charge state or the over-discharge state;
- and
- a circuit for storing said normal state, said over-charge state or said over-discharge state.
Dependencies are inferred from the claim text.