VOLTAGE MONITORING CIRCUIT, AND VEHICLE EQUIPPED WITH SAME
First Claim
1. A voltage monitoring circuit for monitoring voltages across N chargeable and dischargeable series-connected cells of a battery module with a load being connected between a maximum potential and a minimum potential of the battery modules, and a current blocking switch being connected between at least a pair of adjacent ones of the cells, wherein N+1 wires are connected from positive terminals and negative terminals of the cells to the voltage monitoring circuit, the voltage monitoring circuit comprising:
- switching elements connected in series to respective ones of the N+1 wires apart from a wire carrying the maximum potential or the minimum potential, the switching elements being openable and closable by control signals from control lines branched from adjacent ones of the respective wires;
resistive elements connected in series respectively to the control lines between control input terminals of the switching elements and the adjacent ones of the respective wires; and
anti-fuse elements connected respectively between the control input terminals and the respective wires, the wires being disconnected and connected when the switching elements are opened and closed.
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Accused Products
Abstract
During charging of a cell module in which a plurality of cells are connected in series, a voltage is applied in forward polarity to a switch element even when a current interrupting switch provided to the cell module is open, thereby shorting an anti-fuse element, and the switch element is thereby opened. A voltage monitoring circuit and a vehicle equipped with the voltage monitoring circuit are thereby provided in which a high voltage is not applied even when the cell module is charging when the current interrupting switch is open
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Citations
6 Claims
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1. A voltage monitoring circuit for monitoring voltages across N chargeable and dischargeable series-connected cells of a battery module with a load being connected between a maximum potential and a minimum potential of the battery modules, and a current blocking switch being connected between at least a pair of adjacent ones of the cells, wherein N+1 wires are connected from positive terminals and negative terminals of the cells to the voltage monitoring circuit, the voltage monitoring circuit comprising:
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switching elements connected in series to respective ones of the N+1 wires apart from a wire carrying the maximum potential or the minimum potential, the switching elements being openable and closable by control signals from control lines branched from adjacent ones of the respective wires; resistive elements connected in series respectively to the control lines between control input terminals of the switching elements and the adjacent ones of the respective wires; and anti-fuse elements connected respectively between the control input terminals and the respective wires, the wires being disconnected and connected when the switching elements are opened and closed. - View Dependent Claims (2, 3, 4, 5)
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6. A vehicle incorporating:
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a voltage monitoring circuit for monitoring voltages across N chargeable and dischargeable series-connected cells of a battery module with a load being connected between a maximum potential and a minimum potential of the battery module, and a current blocking switch being connected between at least a pair of adjacent ones of the cells, wherein N+1 wires are connected from positive terminals and negative terminals of the cells to the voltage monitoring circuit; and a charging unit for charging the battery module and which is connected between the maximum potential and the minimum potential of the battery module, wherein the voltage monitoring circuit comprising; switching elements connected in series to respective ones of the N+1 wires apart from a wire carrying the maximum potential or the minimum potential, the switching elements being openable and closable by control signals from control lines branched from adjacent ones of the respective wires; resistive elements connected in series respectively to the control lines between control input terminals of the switching elements and the adjacent ones of the respective wires; and anti-fuse elements connected respectively between the control input terminals and the respective wires, the wires being disconnected and connected when the switching elements are opened and closed.
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Specification