Power supply apparatus
First Claim
Patent Images
1. A power supply apparatus comprising:
- a battery apparatus that is composed of a battery;
a temperature sensor that is thermally coupled to the battery and whose electrical resistance changes with a temperature of the battery;
a temperature detection circuit that detects the temperature of the battery by detecting the electrical resistance of the temperature sensor; and
a power supply circuit that feeds electrical power to the temperature detection circuit,wherein the temperature sensor is connected via an overcurrent protection circuit to the power supply circuit, andwherein when an abnormal voltage is applied to the temperature sensor from a voltage source different from the power supply circuit, the overcurrent protection circuit limits, within a predetermined limit current level, magnitude of an abnormal current that the abnormal voltage causes to flow into or out of the power supply circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
A power supply apparatus has a battery apparatus that is composed of a battery, a temperature sensor that is thermally coupled to the battery and whose electrical resistance changes with the temperature of the battery to which it is thermally coupled, a temperature detection circuit that detects the temperature of the battery by detecting the electrical resistance of the temperature sensor, and a power supply circuit that feeds electrical power to the temperature detection circuit. The temperature sensor is connected via an overcurrent protection circuit to the power supply circuit.
37 Citations
10 Claims
-
1. A power supply apparatus comprising:
-
a battery apparatus that is composed of a battery; a temperature sensor that is thermally coupled to the battery and whose electrical resistance changes with a temperature of the battery; a temperature detection circuit that detects the temperature of the battery by detecting the electrical resistance of the temperature sensor; and a power supply circuit that feeds electrical power to the temperature detection circuit, wherein the temperature sensor is connected via an overcurrent protection circuit to the power supply circuit, and wherein when an abnormal voltage is applied to the temperature sensor from a voltage source different from the power supply circuit, the overcurrent protection circuit limits, within a predetermined limit current level, magnitude of an abnormal current that the abnormal voltage causes to flow into or out of the power supply circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A power supply apparatus comprising:
-
a battery apparatus that is composed of a plurality of batteries; a plurality of temperature sensors of which each is thermally coupled to at least one of the batteries and whose electrical resistances change with temperatures of the batteries; a temperature detection circuit that has, on an input side thereof, a multiplexer for switching among the temperature sensors for individual detection of the electrical resistances thereof; and a power supply circuit that feeds electrical power to the temperature detection circuit, wherein the temperature sensors are each connected via an overcurrent protection circuit to the power supply circuit, and wherein, when an abnormal voltage is applied to the temperature sensor from a voltage source different from the power supply circuit, the overcurrent protection circuit limits, within a predetermined limit current level, magnitude of an abnormal current that the abnormal voltage causes to flow into or out of the power supply circuit.
-
Specification