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Electric vehicle high-voltage interlocking detection circuit and detection method

A high-voltage interlocking and detection circuit technology, applied in electric vehicle charging technology, electric vehicles, circuits or fluid pipelines, etc., can solve problems such as the increase of high-voltage connection points, and achieve the effect of ensuring safety and shortening troubleshooting time.

Pending Publication Date: 2021-04-30
SAIC MOTOR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with passenger cars, commercial vehicles generally have more high-voltage components. If multiple battery packs are used for series-parallel connection, some interfaces for taking power from the bodywork may be added, which leads to an increase in the number of high-voltage connection points in the vehicle.

Method used

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  • Electric vehicle high-voltage interlocking detection circuit and detection method

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] The invention discloses a high-voltage interlock detection circuit and a detection method for an electric vehicle. The high-voltage interlock circuit includes a high-voltage connector, a control unit, a vehicle controller (VCU) and an instrument. The high-voltage connector has an interlock function, and each socket Connect different resistors in parallel. When a high-voltage component has multiple high-voltage connectors, when one or more high-voltage connectors fail to connect, the detection unit of this method can judge the specific connection failure point according to the detection resistance value, and send it to the instrument through CAN communication And VCU, VCU adopts corresponding troubleshooting methods according to the fault point, and displays the specific fault location through the instrument, greatly reducing the troubleshooting time.

[0016] A...

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Abstract

The invention relates to an electric vehicle high-voltage interlocking detection circuit which comprises a high-voltage connector, a high-voltage part which comprises a control unit, a vehicle control unit and an instrument, the high-voltage connector and the control unit form a detection loop, and the high-voltage part is connected with the instrument and a VCU through a CAN bus. On the basis of the control unit of a high-voltage part, the detection circuit is designed, interlocking fault points can be accurately positioned through the circuit and an algorithm, corresponding protection strategies can be adopted according to different fault points, safety is guaranteed, troubleshooting time is shortened, and the detection circuit can be applied to all controllers.

Description

technical field [0001] The invention relates to a high-voltage interlock detection circuit and a detection method, in particular to a high-voltage interlock detection circuit and a detection method for electric vehicles, belonging to the technical field of high-voltage safety control of electric vehicles. Background technique [0002] With the continuous development of the economy, energy and environmental problems are becoming more and more serious. Driven by various national promotion policies, new energy commercial vehicles have been widely used in urban sanitation and short-distance transportation. Compared with passenger cars, commercial vehicles generally have more high-voltage components. If multiple battery packs are used for series-parallel connection, some interfaces for taking power from the bodywork may be added, which leads to an increase in the number of high-voltage connection points on the vehicle. In order to ensure the reliable connection of high-voltage co...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60L58/10B60R16/023
CPCB60L3/0023B60L58/10B60R16/0231Y02T10/70Y02T90/16
Inventor 蒋龙张瑞锋王宁海戴能红叶奇云
Owner SAIC MOTOR