SEMICONDUCTOR DEVICE, BATTERY STATE MONITORING MODULE, AND VEHICLE SYSTEM
First Claim
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1. A semiconductor device, comprising:
- a first and a second external terminals coupled to power supply wiring that couples one end of a current detecting resistance and a power supply terminal of a battery;
a third external terminal coupled to an other end of the current detecting resistance;
a measurement part for measuring a voltage difference between the first external terminal and the second external terminal;
a first current source for outputting a first measurement current to the second external terminal;
a second current source for outputting a second measurement current to the third external terminal; and
a control circuit for controlling an output of the second measurement current destined to the third external terminal.
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Abstract
A semiconductor device has a first and a second external terminals coupled to power supply wiring that couples one end of a current detecting resistance and a power supply terminal of a battery, a third external terminal coupled to an other end of the current detecting resistance, and a control circuit for controlling an output of a second measurement current destined to the third external terminal, and measures a voltage difference between the first external terminal and the second external terminal.
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Citations
20 Claims
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1. A semiconductor device, comprising:
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a first and a second external terminals coupled to power supply wiring that couples one end of a current detecting resistance and a power supply terminal of a battery; a third external terminal coupled to an other end of the current detecting resistance; a measurement part for measuring a voltage difference between the first external terminal and the second external terminal; a first current source for outputting a first measurement current to the second external terminal; a second current source for outputting a second measurement current to the third external terminal; and a control circuit for controlling an output of the second measurement current destined to the third external terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A battery state monitoring module, comprising:
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a battery state monitoring device including a current monitor voltage measurement circuit for measuring a current monitor voltage value that varies according to a current value flowing through a current detecting resistance coupled to a power supply terminal of a battery; and an arithmetic circuit that determines a state of the battery based on the current monitor voltage value measured by the battery state monitoring device, and transmits the determination result at a request from a high-order system, wherein the current monitor voltage measurement circuit includes; a first and a second external terminals coupled to power supply wiring that couples one end of the current detecting resistance and the power supply terminal of the battery; a third external terminal coupled to an other end of the current detecting resistance; a measurement part for measuring a voltage difference between the first external terminal and the second external terminal; a first current source for outputting a first measurement current to the second external terminal; a second current source for outputting a second measurement current to the third external terminal; and a control circuit for controlling an output of the second measurement current destined to the third external terminal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A vehicle system, comprising:
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a battery state monitoring module including a battery state monitoring device for measuring a current monitor voltage value that varies according to a current value flowing through a current detecting resistance coupled to power supply terminals of a battery, and an arithmetic circuit that determines a state of the battery based on the current monitor voltage value measured by the battery state monitoring device and transmits the determination result at a request from a high-order system; and a central control unit for outputting an internal ignition signal that directs start and stop of a engine to an electronic load circuit for controlling the engine and a starter, wherein the battery state monitoring device carries out a short-circuit test operation for testing a short circuit state between two external terminals coupled to two ends of the current detecting resistance, and a current monitoring operation of measuring a current monitor voltage value that occurs between the two ends of the current detecting resistance, and wherein the central processing unit makes the engine move to a stop state by the internal ignition signal in response to a vehicle becoming in a stop state, also directs a diagnosis processing of the battery including the short-circuit test operation and the current monitoring operation to the battery state monitoring device, and when making the vehicle move from the stop state to a run state, makes the starter and the engine start by the internal ignition signal and also receives a result of the diagnosis processing of the battery. - View Dependent Claims (18, 19, 20)
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Specification