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Control method of high voltage relay in electric vehicle

A technology of high-voltage relays and control methods, which is applied to vehicle components, circuits or fluid pipelines, transportation and packaging, and can solve problems affecting the control effectiveness, stability, and safety of battery high-voltage relays, so as to improve control effectiveness , the effect of preventing function failure

Active Publication Date: 2020-06-23
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, from the operation experience of the whole vehicle, the relay control failure phenomenon caused by software response delay or bug or hardware failure still seriously affects the effectiveness, stability and safety of the battery high-voltage relay control

Method used

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  • Control method of high voltage relay in electric vehicle

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Embodiment Construction

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0018] The embodiment of the present invention provides a control method for a high-voltage relay in an electric vehicle. On the basis of the general control of a battery high-voltage relay, the relay control software runs delayed or has a bug, and the relay hardware failure problem is comprehensively considered. The high-voltage relay function safety control logic prevents the generation of high-voltage relay error requirements and optimizes the effectiveness, stability, and safety of battery high-voltage relay control.

[0019] Such as...

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Abstract

The invention discloses a method for controlling a high voltage relay in an electric vehicle. The method includes the steps that when a current in a high voltage circuit of a battery is less than a set current value, if a vehicle controller sends a closing command to any relay and the vehicle controller sends an instruction on cutting off a high voltage due to a high voltage fault demand, a firstoff delay fault of the high voltage relay is reported. According to the method for controlling the high voltage relay in the electric vehicle, by controlling and reporting the high voltage relay undervarious fault conditions, functional failure of the high voltage relay is prevented, and the stability and safety of the high voltage relay are enhanced.

Description

technical field [0001] The invention relates to new energy vehicle technology, in particular to a control method for a high-voltage relay in an electric vehicle. Background technique [0002] In the prior art, the battery high-voltage relay control of pure electric and hybrid electric vehicles simply follows two basic principles. One is that the battery is working normally, and the battery management system controls the high-voltage relay according to the steps of offline detection-precharging-online-offline (unloading)-cutting to control the high-voltage on-off of the battery; If the whole vehicle needs to cut off the high voltage fault, jump directly from the fault step to the emergency cut off (all relays are disconnected regardless of whether the load unloading is completed) to ensure the battery high voltage safety. [0003] However, judging from the operation experience of the whole vehicle, the failure of relay control due to software response delay or bugs and hardw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R16/023
CPCB60R16/0233
Inventor 徐钦建李守强邹振强
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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