Diagnostic system and method for electric leak detecting device

• US 6,970,807 B2
• Filed: 05/28/2004
• Issued: 11/29/2005
• Est. Priority Date: 05/29/2003
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kato, Kazuyuki, Fujita, Hiroshi, Asai, Toshiharu, Kito, Yuji
• Primary Examiner(s): Assouad, Patrick J.
• Application Number:
  US10/855,508
• Publication Number:
  US 20040243288A1
• Time in Patent Office: 550 Days
• Field of Search: 702/64, 702/65, 702/60, 702/63, 702/182, 702/183, 701/29, 701/31, 701/36, 701/99, 361/1, 361/42, 361/88, 361/93.1, 307 9- 101, 307/10.6, 307/10.7, 724/500, 724/503, 724/509, 724/510, 724/511, 724/522, 724/523, 724/527, 724/538, 724/600, 724/76.11
• US Class Current: 702/183
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 3/0023 Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: G01R 31/52 Testing for short-circuits, leakage current or ground faults
• CPC Class Codes: H02H 1/0007 concerning the detecting means in general G01R or other subclasses of G01; reed switches H01H71/2445
• CPC Class Codes: H02H 3/08 responsive to excess current responsive to abnormal temperature caused by excess current H02H5/04
• CPC Class Codes: H02H 3/17 by means of an auxiliary voltage injected into the installation to be protected using summation current transformers H02H3/33
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A power supply unit includes a battery, a motor which is driven by the battery, an electric power converting device which is provided between the battery and the motor, a simulated electric leak generating device which generates an electric leak state between the battery and a vehicle body, and an electric leak detecting device which detects a simulated electric leak. A diagnostic system which performs a diagnosis of operating performance of the electric leak detecting device includes an opening/closing device which connects/disconnects the electric power converting device to/from the battery, and an opening/closing detecting device which detects opening/closing of the opening/closing device and which outputs a result of detection to the simulated electric leak generating device and the electric leak detecting device. When opening/closing of the opening/closing device is detected by the opening/closing detecting device, both generation of a simulated electric leak and detection of an electric leak are retried.

Claims

1. A diagnostic system which performs a diagnosis of operating performance of an electric leak detecting device, in a power supply unit including a battery, a motor which is driven by the battery, an electric power converting device which is provided between the battery and the motor, a simulated electric leak generating device which generates an electric leak state between the battery and a vehicle body, and the electric leak detecting device which detects a simulated electric leak, comprising:

an opening/closing device which connects/disconnects the electric power converting device to/from the battery; and

an opening/closing detecting device which detects opening/closing of the opening/closing device and which outputs a result of detection to the simulated electric leak generating device and the electric leak detecting device, wherein the electric leak detecting device performs at least one of retry and temporary suspension of both generation of a simulated electric leak and detection of an electric leak, when opening/closing of the opening/closing device is detected by the opening/closing detecting device.

2. The diagnostic system according to claim 1, wherein the opening/closing device connects the electric power converting device to the battery when an ignition key is at a start position, and disconnects the electric power converting device from the battery when the ignition key is at positions other than the start position.

3. The diagnostic system according to claim 2, wherein the opening/closing detecting device notifies the simulated electric leak generating device of opening/closing of the opening/closing device via the electric leak detecting device.

4. A diagnostic system which performs a diagnosis of operating performance of an electric leak detecting device, in a power supply unit including a battery, a motor which is driven by the battery, an electric power converting device which is provided between the battery and the motor, and the electric leak detecting device which detects an electric leak between the battery and a vehicle body, comprising:

an opening/closing device which connects/disconnects the electric power converting device to/from the battery, and

an opening/closing detecting device which detects opening/closing of the opening/closing device and which outputs a result of detection to the electric leak detecting device, wherein the electric leak detecting device performs at least one of retry and temporary suspension of detection of an electric leak, when opening/closing of the opening/closing device is detected by the opening/closing detecting device.

5. The diagnostic system according to claim 4, wherein the opening/closing device connects the electric power converting device to the battery when an ignition key is at a start position, and disconnects the electric power converting device from the battery when the ignition key is at positions other than the start position.

6. A diagnostic method for performing a diagnosis of operating performance of an electric leak detecting device, comprising the steps of:

generating an electric leak state between a battery and a vehicle body;

connecting/disconnecting an electric power converting device, which is provided between the battery and a motor, to/from the battery;

detecting connection/disconnection between the battery and the electric power converting device; and

performing at least one of retry and temporary suspension of both generation of a simulated electric leak and detection of an electric leak, when connection/disconnection between the battery and the electric power converting device is detected.

7. A diagnostic method for performing a diagnosis of operating performance of an electric leak detecting device, comprising the steps of:

detecting an electric leak between a battery and a vehicle body;

connecting/disconnecting an electric power converting device, which is provided between the battery and a motor, to/from the battery;

detecting connection/disconnection between the battery and the electric power converting device; and

performing at least one of retry and temporary suspension of detection of an electric leak, when connection/disconnection between the battery and the electric power converting device is detected.