Car power source apparatus
First Claim
1. A car power source apparatus comprising:
- a battery having a plurality of battery modules connected in series on positive and negative sides of a midpoint reference node;
a voltage detection circuit that detects the voltage of one or a plurality of battery modules with respect to the midpoint reference node of the battery, the voltage detection circuit being connected on positive and negative sides of the midpoint reference node, the battery midpoint reference node being connected to the voltage detection circuit via a plurality of reference connection lines; and
at least one conduction detection circuit for detecting abnormal conduction including a contact failure and an open circuit in each of the reference connection lines, supplying voltage from the battery modules to each of the reference connection lines to forcibly pass a current, and detecting current in each of the reference connection lines, the conduction detection circuit being connected to the reference connection lines separately with respect to the voltage detection circuit,wherein the connection status of each of the reference connection lines to the midpoint reference node can be detected via the conduction detection circuit.
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Accused Products
Abstract
A car power source apparatus is provided with a battery having a plurality of battery modules connected in series on positive and negative sides of a midpoint reference node, and a voltage detection circuit that detects the voltage of one or a plurality of battery modules with respect to the midpoint reference node of the battery. The battery midpoint reference node of the power source apparatus is connected to the voltage detection circuit via a plurality of reference connection lines. Further, one or a plurality of conduction detection circuits connect to the reference connection lines, supply a voltage to each reference connection line, and detect current. The connection status of each reference connection line to the midpoint reference node is determined by this conduction detection circuit.
15 Citations
11 Claims
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1. A car power source apparatus comprising:
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a battery having a plurality of battery modules connected in series on positive and negative sides of a midpoint reference node; a voltage detection circuit that detects the voltage of one or a plurality of battery modules with respect to the midpoint reference node of the battery, the voltage detection circuit being connected on positive and negative sides of the midpoint reference node, the battery midpoint reference node being connected to the voltage detection circuit via a plurality of reference connection lines; and at least one conduction detection circuit for detecting abnormal conduction including a contact failure and an open circuit in each of the reference connection lines, supplying voltage from the battery modules to each of the reference connection lines to forcibly pass a current, and detecting current in each of the reference connection lines, the conduction detection circuit being connected to the reference connection lines separately with respect to the voltage detection circuit, wherein the connection status of each of the reference connection lines to the midpoint reference node can be detected via the conduction detection circuit. - View Dependent Claims (2, 4, 10, 11)
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3. A car power source apparatus comprising:
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a battery having a plurality of battery modules connected in series on positive and negative sides of a midpoint reference node; and a voltage detection circuit for detecting the voltage of one or a plurality of battery modules with respect to the midpoint reference node of the battery, the voltage detection circuit being connected on positive and negative sides of the midpoint reference node, the battery midpoint reference node being connected to the voltage detection circuit via a plurality of reference connection lines, at least one conduction detection circuit for detecting abnormal conduction including a contact failure and an open circuit in each of the reference connection lines, supplying voltage from the battery modules to each of the reference connection lines to forcibly pass a current, and detecting current in each of the reference connection lines; the conduction detection circuit being connected to the reference connection lines separately with respect to the voltage detection circuit, and the conduction detection circuit being operable to detect the connection status of each of the reference connection lines to the midpoint reference node, wherein the conduction detection circuit is provided with a plurality of voltage supply switches for applying voltage from the battery modules to the reference connection lines via a current limiting resistor, one current detection device connected in series with the voltage supply switch for determining if conduction occurs or not, and a plurality of conduction switches for connecting the current detection device with each of the reference connection lines; and wherein the series circuit comprising the current detection device, the current limiting resistor, and the voltage supply switch is connected to one of the reference connection lines selected by the associated conduction switch;
voltage supplied from the battery modules via the voltage supply switch is applied to the selected reference connection line; and
conduction or no conduction is detected by the current detection device to detect conduction of the selected reference connection line, andwherein the current limiting resistor is connected to the battery modules via a plurality of voltage supply switches. - View Dependent Claims (5, 6)
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7. A car power source apparatus comprising:
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a battery having a plurality of battery modules connected in series on positive and negative sides of a midpoint reference node; a voltage detection circuit that detects the voltage of one or a plurality of battery modules with respect to the midpoint reference node of the battery, the voltage detection circuit being connected on positive and negative sides of the midpoint reference node, the battery midpoint reference node being connected to the voltage detection circuit via a plurality of reference connection lines; and at least one conduction detection circuit for detecting abnormal conduction including a contact failure and an open circuit in each of the reference connection lines, the conduction detection circuit being connected to the reference connection lines separately with respect to the voltage detection circuit for supplying voltage from the battery modules to each of the reference connection lines to forcibly pass a current, and detecting current in each of the reference connection lines, wherein the connection status of each of the reference connection lines to the midpoint reference node can be detected via this conduction detection circuit, wherein the conduction detection circuit is provided with at least one voltage supply switch for applying voltage from the battery modules to the reference connection lines via a current limiting resistor, one current detection device connected in series with the voltage supply switch for determining if conduction occurs or not, and a plurality of conduction switches for connecting the current detection device with each of the reference connection lines, wherein the series circuit comprising the current detection device, the current limiting resistor, and the voltage supply switch is connected to one of the reference connection lines selected by the associated conduction switch so that voltage supplied from the battery modules via the voltage supply switch is applied to the selected reference connection line; and
conduction or no conduction is detected by the current detection device to detect conduction of the selected reference connection line, andwherein the conduction detection circuit further comprises a control circuit for controlling the voltage supply switch and the conduction switches on and off, judging whether the current detection device is on or off, and determining if the status of the reference connection lines is normal or not, and wherein the current limiting resistor is connected to the battery modules via a plurality of voltage supply switches. - View Dependent Claims (8, 9)
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Specification