VOLTAGE MONITORING DEVICE
First Claim
1. A voltage monitoring device for monitoring voltage of each of battery cells connected in series to one another to configure an assembled battery, comprising:
- a capacitor circuit that includes a plurality of capacitors connected in series to one another;
a filter circuit that includes a plurality of resistors connected to an electrode terminal of each of the battery cells;
an input side connection switching unit that connects the electrode terminal of each of the battery cells to an independent terminal of the plurality of capacitors and a connection terminal between adjacent capacitors among the plurality of capacitors via the filter circuit to apply voltage of each of the battery cells to the capacitors;
a potential difference detection unit that includes a plurality of input terminals and detects a potential difference between the plurality of input terminals;
an output side connection switching unit that connects the independent end of the plurality of capacitors and the connection end between the adjacent capacitors to the plurality of input terminals to apply charged voltage of at least one capacitor among the plurality of input terminals to the plurality of input terminals of the potential difference detection unit,wherein;
the plurality of resistors is divided into a first resistor group and a second resistor group;
the first resistor group is connected to the connection end between the adjacent capacitors;
the second resistor group is connected to the independent end of the plurality of capacitors; and
a resistance value of the first resistor group is smaller than a resistance value of the second resistor group.
1 Assignment
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Accused Products
Abstract
A voltage monitoring device monitors voltage of each of battery cells connected in series to one another to configure an assembled battery. The device includes a capacitor circuit, a filter circuit, an input side connection switching unit, a potential difference detection unit, and an output side connection switching unit. The capacitor circuit includes a plurality of capacitors connected in series to one another. The filter circuit includes a plurality of resistors connected to an electrode terminal of each of the battery cells. The plurality of resistors are divided into a first resistor group and a second resistor group. The first resistor group is connected to a connection end between adjacent capacitors of the plurality of capacitors. The second resistor group is connected to an independent end of the plurality of capacitors. A resistance value of the first resistor group is smaller than a resistance value of the second resistor group.
36 Citations
10 Claims
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1. A voltage monitoring device for monitoring voltage of each of battery cells connected in series to one another to configure an assembled battery, comprising:
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a capacitor circuit that includes a plurality of capacitors connected in series to one another; a filter circuit that includes a plurality of resistors connected to an electrode terminal of each of the battery cells; an input side connection switching unit that connects the electrode terminal of each of the battery cells to an independent terminal of the plurality of capacitors and a connection terminal between adjacent capacitors among the plurality of capacitors via the filter circuit to apply voltage of each of the battery cells to the capacitors; a potential difference detection unit that includes a plurality of input terminals and detects a potential difference between the plurality of input terminals; an output side connection switching unit that connects the independent end of the plurality of capacitors and the connection end between the adjacent capacitors to the plurality of input terminals to apply charged voltage of at least one capacitor among the plurality of input terminals to the plurality of input terminals of the potential difference detection unit, wherein; the plurality of resistors is divided into a first resistor group and a second resistor group; the first resistor group is connected to the connection end between the adjacent capacitors; the second resistor group is connected to the independent end of the plurality of capacitors; and a resistance value of the first resistor group is smaller than a resistance value of the second resistor group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A battery voltage monitoring system comprising:
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an assembled battery that is configured by a plurality of battery cells connected in series to one another; and a voltage monitoring device that monitors voltage of each of the battery cells, wherein the voltage monitoring device including; a capacitor circuit that includes a plurality of capacitors connected in series to one another; a filter circuit that includes a plurality of resistors connected to an electrode terminal of each of the battery cells; an input side connection switching unit that connects the electrode terminal of each of the battery cells to an independent terminal of the plurality of capacitors and a connection terminal between adjacent capacitors among the plurality of capacitors via the filter circuit to apply voltage of each of the battery cells to the capacitors; a potential difference detection unit that includes a plurality of input terminals and detects a potential difference between the plurality of input terminals; an output side connection switching unit that connects the independent end of the plurality of capacitors and the connection end between the adjacent capacitors to the plurality of input terminals to apply charged voltage of at least one capacitor among the plurality of input terminals to the plurality of input terminals of the potential difference detection unit, wherein; the plurality of resistors is divided into a first resistor group and a second resistor group; the first resistor group is connected to the connection end between the adjacent capacitors; the second resistor group is connected to the independent end of the plurality of capacitors; and a resistance value of the first resistor group is smaller than a resistance value of the second resistor group.
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Specification