MINIMIZING ELECTRICAL OUTLET SAFETY FAILURES DUE TO OVER TEMPERATURE CONDITION

• US 20090167537A1
• Filed: 12/28/2007
• Published: 07/02/2009
• Est. Priority Date: 12/28/2007
• Status: Abandoned Application

• Current Assignee: Hitachi Global Storage Technologies Netherlands BV (Western Digital Corporation)
• Original Assignee: Hitachi Global Storage Technologies Netherlands BV (Western Digital Corporation)
• Inventors: Lee, Sylvia Lui, Flechsig, Karl Arthur, Gillis, Donald Ray, Feliss, Norbert A.
• Application Number:
  US11/966,142
• Publication Number:
  US 20090167537A1
• Time in Patent Office: Days
• US Class Current: 340/584
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 53/16 Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/60 Monitoring or controlling charging stations
• CPC Class Codes: H01R 13/6683 with built-in sensor
• CPC Class Codes: H02H 3/025 Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection
• CPC Class Codes: H02H 3/33 using summation current transformers H02H3/347 takes precedence
• CPC Class Codes: H02H 5/042 using temperature dependent resistors
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A device and system for monitoring the condition of an electrical outlet such as a 110 volt or 220 volt outlet to alert a user to a dangerous situation and to interrupt power to the circuit in the event of the dangerous condition. The device monitors the circuit for degradation to the electrical outlet. The system can include a temperature sensor voltage meter or particle detector (smoke detector) connected with a power outlet. When a parameter of a circuit exceed a predetermined level (indicating the outlet has degraded to an unsafe level) a warning can be reported and if necessary power to the device can be adjusted or interrupted.

Claims

1. A power supply apparatus, comprising:

a power outlet;

a power supply line, connected with the power outlet; and

a sensor connected with the power outlet, the sensor being operable to generate a signal in response to a degradation of the power outlet.

2. A power supply apparatus as in claim 1 wherein the sensor is a temperature sensor.

3. A power supply apparatus as in claim 1 wherein the sensor is a thermistor and the signal is a change in resistance of the thermistor.

4. A power supply apparatus as in claim 1 wherein the sensor is a particle sensor.

5. A power supply apparatus as in claim 1 further comprising a controller circuitry connected with the sensor and the power supply line, the controller circuitry being functional to alter a current flow through the power supply line in response to the signal.

6. A power supply apparatus as in claim 1 wherein the sensor is a temperature sensor, the apparatus further comprising a circuit breaker connected with the power supply line the circuit breaker being operable to discontinue a current flow through the power supply line in response to the signal from the temperature sensor.

7. A power supply apparatus as in claim 1 wherein the sensor is a thermistor, and further comprising:

a solenoid;

sensor electronics connected with the thermistor to receive the signal from the thermistor, the sensor electronics being operable to activate the solenoid in response to the signal from the thermistor.

8. A power supply apparatus as in claim 1 further comprising:

a semiconductor based switch; and

sensor electronics connected with the sensor to receive the signal from the thermistor, the sensor electronics being operable to activate the semiconductor based switch in response to the signal from the sensor.

9. A power supply apparatus as in claim 1 further comprising ground fault interrupter circuitry including a solenoid and a switch connected with the power supply line, the solenoid being connected with the switch being operable to open the switch, and wherein the sensor is integrated with the ground fault interrupter circuitry to activate the solenoid in response to the signal from the sensor.

10. A power supply apparatus as in claim 1 further comprising ground fault interrupter circuitry including a solenoid and a switch connected with the power supply line, the solenoid being connected with the switch being operable to open the switch, and wherein the sensor is a thermistor and is integrated with the ground fault interrupter circuitry to activate the solenoid in response to the signal from the thermistor.

11. A power supply apparatus as in claim 1 further comprising a communication function to report a first level (level 1) as a warning condition and a second level (level 2) for interruption.

12. A power supply apparatus as in claim 1 further comprising a communication function for communicating with an external device and with a power regulator connected with the load, the power regulator being operable to regulate power delivery through the outlet in response to the signal from the sensor.

13. A power supply apparatus as in claim 1 wherein the sensor is a thermistor and further comprising a communication function connected with a power regulator connected with the power supply line and operable to regulate a power delivery through the power supply line in response to the signal from the sensor.

14. A power supply apparatus as in claim 1 wherein the sensor is a thermistor and further comprising a current regulator connected with the power supply line and operable to regulate a current delivery through the power supply line in response to the signal from the sensor.

15. A power supply apparatus as in claim 1 wherein the sensor detects an impedance of the outlet and further comprising a controller connected operable to control a current delivered through the power line in response to the signal from the sensor.

16. A power supply apparatus as in claim 1 wherein the sensor detects an impedance of the outlet and further comprising:

a circuit breaker connected with the power supply line; and

sensor circuitry connected with the sensor for receiving the signal from the sensor and operable to activate the circuit breaker in response to the signal from the sensor.

17. A power supply apparatus as in claim 1 wherein the sensor is a thermistor, the apparatus further comprising:

sensor electronics circuitry connected with the sensor for receiving the signal from the thermistor;

a circuit breaker connected with the power supply line;

wherein

the sensor electronic circuitry is operable to receive the signal from the sensor and to activate the circuit breaker in response to the signal, the circuit breaker circuitry also being operable to monitor an ambient temperature and to factor the ambient temperature in a determination of whether to activate the circuit breaker.

23. A power supply apparatus as in claim 1, further comprising:

circuitry for issuing a warning in the event that the signal from the circuit exceeds a predetermined threshold; and

a storage for storing a record of the warning.

18. A power supply apparatus, comprising:

a power outlet;

a power supply line, connected with the power outlet; and

a temperature sensor connected with the power outlet, the temperature sensor being operable to generate a signal corresponding to a temperature of the power outlet; and

circuitry for receiving the signal from the temperature sensor, and operable to alert a user in the event that the signal from the temperature sensor exceeds a predetermined threshold.

19. A power supply apparatus as in claim 18 wherein the circuitry activates a visual display in the event that the signal from the temperature sensor exceeds a predetermined threshold.

20. A power supply apparatus as in claim 18 wherein the circuitry activates an audible alarm in the event that the signal from the temperature sensor exceeds a predetermined threshold.

21. A power supply apparatus as in claim 18 wherein further comprising a power regulator connected with the power line for regulating a current flow through the power line in response to a signal from the circuitry for receiving a signal from the temperature sensor.

22. A power supply apparatus as in claim 18 wherein further comprising a circuit breaker connected with the power line for terminating a current flow through the power line in response to a signal from the circuitry for receiving a signal from the temperature sensor.