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Interlock device for high voltage apparatus

A technology of high-voltage equipment and interlocking devices, which is applied to electrical devices, measuring devices, heating/cooling equipment, etc., and can solve problems such as inability to accurately detect disconnection of connectors

Pending Publication Date: 2021-04-27
三电株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, the conventional interlock device can detect the disconnection of the connector, but there is the following problem: when the interlock ring has a power short circuit or a ground short circuit, or when the interlock device itself fails, it cannot accurately detect the disconnection of the connector. disconnect

Method used

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  • Interlock device for high voltage apparatus
  • Interlock device for high voltage apparatus
  • Interlock device for high voltage apparatus

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Embodiment Construction

[0029] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. figure 1 Functional blocks constituting an inverter 1 for an electric compressor constituting a vehicle air conditioner to which the high-voltage equipment of the present invention is applied are shown. exist figure 1 Among them, 2 is the motor driving the electric compressor, which is driven by the inverter output circuit 3. 4 is a high-voltage detection sensor, 6 is a filter / capacitor, and these are connected to the HV battery 8 which is a high-voltage power supply mounted on the vehicle through the HV connector 7.

[0030] In addition, 9 is a controller constituted by a microcomputer, and the motor 2 of the electric compressor is driven and controlled by the controller 9 . The controller 9 is connected to a LIN transceiver 13 via a bidirectional digital isolator 11 and a photocoupler 12, and the LIN transceiver 13 is connected to a not-shown vehicle-side controller ...

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Abstract

The invention provides an interlock device for a high voltage apparatus, which not only enables a connection, non-connection state diagnosis of a connector when an interlock device is normal, but can also detect a fault in the interlock device itself including a fault in an interlock loop. The interlock device is provided with: an interlock loop (16) which is installed side-by-side with an HV connector (7) for connecting an electric compressor to an HV battery (8); a detection signal output unit; a first switching element; a control voltage switching circuit which switches a voltage applied to a control electrode of the first switching element according to an output from the detection signal output unit, when the interlock loop is in a closed state; a second switching element which applies an output from the control voltage switching circuit to the control electrode of the first switching element so that an ON / OFF state of the first switching element is inverted to when the interlock loop is in the closed state, when the interlock loop is in an open state; and a fault diagnosis unit.

Description

technical field [0001] The present invention relates to an interlock device for detecting disconnection of a connector that connects high-voltage equipment such as an electric compressor mounted on a vehicle to a high-voltage power supply. Background technique [0002] For example, an electric compressor constituting an air conditioner of a vehicle is connected to a high-voltage power source (HV battery) through a connector (HV connector). Since there is a risk of accidents such as electric shock when the connector is disconnected, conventionally, an interlock ring of an interlock device has been arranged side by side in order to detect disconnection of the connector. [0003] Furthermore, the interlock ring is also in a closed state (closed circuit) and a disconnected state (open circuit) by connection and non-connection (disconnection) of the connectors. A signal of a certain level is output from the controller to the interlock ring, and the interlock ring is in an open s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L1/00B60L3/00G01R31/50
CPCG01R31/67G01R35/00G01R31/006B60L1/003B60L3/0069G01R31/66B60H1/00428B60L1/00B60L3/12H01H9/226
Inventor 吉田浩金云海
Owner 三电株式会社
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