Battery system for vehicle, on-vehicle battery module, and cell controller
First Claim
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1. A battery system, comprising:
- a battery unit that is constituted with a plurality of cell groups, which are electrically connected in series, each include a plurality of battery cells, which are electrically connected in series;
integrated circuits that are each provided in correspondence to one of the cell groups of the battery unit and each input terminal voltages at the battery cells in a corresponding cell group to measure each of the terminal voltages at the battery cells, whereinthe integrated circuits each comprise;
a selection circuit that selects a terminal voltage of a battery cell that is a measurement target from among the terminal voltages at the battery cells in the corresponding cell group;
an AD converter that converts the terminal voltage, which is outputted from the selection circuit, from an analog value to a digital value;
a power source circuit that generates a power source voltage supplied to circuits in an integrated circuit; and
a voltage generation circuit that generates a known value voltage, whereinin case that a voltage is measured for diagnosing the voltage generation circuit, the selection circuit selects the known value voltage and the AD converter converts the known value voltage, which is outputted from the selection circuit, from an analog value to a digital value.
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Abstract
A battery system for vehicle comprises a battery unit that is constituted with a plurality of serially connected cell groups each include a plurality of serially connected battery cells, integrated circuits that are each disposed in correspondence to one of the cell groups of the battery unit and each measure terminal voltages at the battery cells in the corresponding cell group, and a signal transmission path through which one of the integrated circuits is connected to another one of the integrated circuits or to a circuit other than that of the integrated circuits.
27 Citations
30 Claims
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1. A battery system, comprising:
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a battery unit that is constituted with a plurality of cell groups, which are electrically connected in series, each include a plurality of battery cells, which are electrically connected in series; integrated circuits that are each provided in correspondence to one of the cell groups of the battery unit and each input terminal voltages at the battery cells in a corresponding cell group to measure each of the terminal voltages at the battery cells, wherein the integrated circuits each comprise; a selection circuit that selects a terminal voltage of a battery cell that is a measurement target from among the terminal voltages at the battery cells in the corresponding cell group; an AD converter that converts the terminal voltage, which is outputted from the selection circuit, from an analog value to a digital value; a power source circuit that generates a power source voltage supplied to circuits in an integrated circuit; and a voltage generation circuit that generates a known value voltage, wherein in case that a voltage is measured for diagnosing the voltage generation circuit, the selection circuit selects the known value voltage and the AD converter converts the known value voltage, which is outputted from the selection circuit, from an analog value to a digital value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A battery system, comprising:
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a plurality of battery cells that are electrically connected in series; a voltage measurement circuit that inputs each of terminal voltages of the plurality of battery cells, and measures each of the terminal voltages of the plurality of battery cells; a power source circuit that generates a power source voltage; a voltage generation circuit that generates a known value voltage, wherein; the voltage measurement circuit includes a selection circuit that inputs the terminal voltages of the plurality of battery cells and selects a terminal voltage of a battery cell that is a measurement target from among the input terminal voltages, and an AD converter that converts the terminal voltage which is outputted from the selection circuit, from an analog value to a digital value; the selection circuit selects the known value voltage of the voltage generation circuit in case that a voltage is measured for diagnosing the voltage generation circuit; and the AD converter converts the known value voltage which is outputted from the selection circuit, from an analog value to a digital value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An integrated circuit that is provided in correspondence to a cell group including a plurality of battery cells which are electrically connected in series, and inputs terminal voltages at the plurality of battery cells in the cell group to measure each of the terminal voltages at the plurality of battery cells, comprising:
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a selection circuit that selects a terminal voltage of a battery cell that is a measurement target from among the terminal voltages at the individual battery cells in a corresponding cell group; an AD converter that converts the terminal voltage, which is outputted from the selection circuit, from an analog value to a digital value; a power source circuit that generates a power source voltage supplied to circuits in the integrated circuit; a voltage generation circuit that generates a known value voltage, wherein; in case that a voltage is measured for diagnosing the voltage generation circuit, the selection circuit selects the known value voltage and the AD converter converts the known value voltage, which is outputted from the selection circuit, from an analog value to a digital value. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification