Semiconductor device, battery state monitoring module, and vehicle system
First Claim
1. A battery system of a vehicle, comprising:
- a battery coupled between a positive node and a negative node of power supply wirings of the vehicle;
a current detecting resistance coupled between the positive node and the negative node in series with the battery;
a vehicle control circuit configured to output an internal ignition signal to an engine starter and an engine controller;
a battery state monitoring circuit configured to detect a current monitor voltage corresponding to a current flow through the current detecting resistance coupled to the battery, the battery state monitoring circuit includes;
a state control circuit configured to detect a short-circuit of the two ends of the current detecting resistance based on the current monitor voltage and notice the detection of the short-circuit to the vehicle control system;
a first current source configured to output a first current to the battery and the current detection resistance from a first end of the current detecting resistance which is coupled to the battery; and
a second current source configured to output a second current to the battery and the current detection resistance from a second end of the current detecting resistance,wherein the battery state monitoring circuit operates the detection of the short-circuit upon stop of the vehicle, andwherein the vehicle control circuit is further configured to disable the activation of the internal ignition signal upon the detection of the short-circuit.
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Accused Products
Abstract
A vehicle system, includes 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, 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.
51 Citations
5 Claims
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1. A battery system of a vehicle, comprising:
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a battery coupled between a positive node and a negative node of power supply wirings of the vehicle; a current detecting resistance coupled between the positive node and the negative node in series with the battery; a vehicle control circuit configured to output an internal ignition signal to an engine starter and an engine controller; a battery state monitoring circuit configured to detect a current monitor voltage corresponding to a current flow through the current detecting resistance coupled to the battery, the battery state monitoring circuit includes; a state control circuit configured to detect a short-circuit of the two ends of the current detecting resistance based on the current monitor voltage and notice the detection of the short-circuit to the vehicle control system; a first current source configured to output a first current to the battery and the current detection resistance from a first end of the current detecting resistance which is coupled to the battery; and a second current source configured to output a second current to the battery and the current detection resistance from a second end of the current detecting resistance, wherein the battery state monitoring circuit operates the detection of the short-circuit upon stop of the vehicle, and wherein the vehicle control circuit is further configured to disable the activation of the internal ignition signal upon the detection of the short-circuit. - View Dependent Claims (2, 3, 4, 5)
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Specification