Diagnostic device, system and method for high-voltage relay

A technology of high-voltage relays and diagnostic devices, which is applied in measuring devices, circuit breaker testing, instruments, etc., can solve the problems of low diagnostic coverage and difficult fault diagnosis, so as to prevent faults from being difficult to diagnose, diagnose efficiently, and improve diagnosis The effect of coverage

Pending Publication Date: 2019-10-25
上海元城汽车技术有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a diagnostic device, system and method for a high-voltage relay to solve the problem that some faults in the prior art are difficult to diagnose, resulting in low diagnostic coverage.

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  • Diagnostic device, system and method for high-voltage relay
  • Diagnostic device, system and method for high-voltage relay
  • Diagnostic device, system and method for high-voltage relay

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Embodiment Construction

[0039] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them.

[0040] High-voltage relay: It is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change in the input quantity (excitation quantity) of the high-voltage circuit meets the specified requirements. A high-voltage relay is an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually used in an automatic control circuit.

[0041] figure 1 A schematic structural di...

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Abstract

The invention provides a diagnostic device, system and method for a high-voltage relay and relates to the technical field of high-voltage relays. The device includes a controller, a first transistor,a second transistor, a first feedback circuit and a second feedback circuit, wherein the controller is connected to a gate of the first transistor, a drain electrode of the first transistor is connected to a battery, a source electrode of the first transistor is connected to a first coil end of the high-voltage relay, a source electrode of the first transistor is also connected to a controller through the first feedback circuit, the controller is connected to a gate of the second transistor, a source electrode of the second transistor is grounded, a source electrode of the second transistor isgrounded, a drain electrode of the second transistor is connected to a second coil end of the high-voltage relay, and a drain electrode of the second transistor is further connected to the controllervia the second feedback circuit. Compared with the prior art, the invention improves the diagnostic coverage for the high-voltage relay.

Description

technical field [0001] The present application relates to the technical field of high voltage relays, in particular, to a diagnostic device, system and method for high voltage relays. Background technique [0002] High-voltage relays are also widely used in the field of electric vehicles, and the high-voltage safety of electric vehicles is an important content in the field of electric vehicle safety, which directly affects the safety of electric vehicles. [0003] In the prior art, an electric vehicle usually adopts high-side and low-side driving to control the high-voltage relay to be turned off at the same time, so as to ensure that the high-voltage relay can be turned off reliably. Under the requirements of high voltage safety or functional safety, it is also necessary to diagnose the driving state of the high and low sides of the high voltage relay. Usually, an intelligent driver chip can be used to drive the high-side driver or the ground-side driver separately, which ...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3275
Inventor 周毅王靖姜辛赵玉良
Owner 上海元城汽车技术有限公司
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