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Electric automobile high-voltage power-on circuit and control method thereof

A high-voltage power-on, electric vehicle technology, applied in electric vehicles, electric traction, electrical devices, etc., can solve problems such as expanding system failures, inability to detect the actual state of high-voltage relays, and simple topology, and achieve the effect of ensuring safety.

Active Publication Date: 2015-04-29
HUIZHOU EPOWER ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing electric vehicle high-voltage power-on circuit has a simple topology and cannot be used to detect the actual state of the high-voltage relay. failure, it may lead to power-on failure, and even further expand the failure of the system

Method used

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  • Electric automobile high-voltage power-on circuit and control method thereof
  • Electric automobile high-voltage power-on circuit and control method thereof

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Embodiment Construction

[0017] In order to allow those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.

[0018] Such as figure 1 As shown, a high-voltage power-on circuit for electric vehicles includes a battery pack and a positive relay K1 connected between the battery pack and the load, a negative relay K3, a pre-charging resistor R, and a pre-charging relay K2, and also includes a setting The pre-charging capacity C at both ends of the load, one end of the positive relay K1 and the negative relay K3 are respectively connected to the total positive and total negative terminals of the battery pack, the other end of the positive relay K1 and the negative relay K3 are connected to the load, and the pre-charge The resistor R and the pre-charging relay K2 form a series branch, the series branch is arranged at both ends of the positive relay K1 to form a parallel ...

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Abstract

The invention discloses an electric automobile high-voltage power-on circuit and a control method thereof. The circuit comprises a battery pack, a positive relay, a negative relay, a pre-charge resistor, a pre-charge relay and a pre-charge capacitor, wherein the positive relay, the negative relay, the pre-charge resistor and the pre-charge relay are connected between the battery pack and a load; the pre-charge capacitor is arranged at the two ends of the load; certain ends of the positive relay and the negative relay are connected to a master positive end and a master negative end of the battery pack respectively; the other ends of the positive relay and the negative relay are connected with the load; the pre-charge resistor and the pre-charge relay form a series branch; the series branch is arranged at the two ends of the positive relay and forms a parallel circuit; the pre-charge resistor is connected to the master positive end of the battery pack. The detection of an actual state of the relay is realized, a fault can be timely reported under the condition that a high-voltage loop fails, high-voltage power-on operation is stopped, and the safety of the battery system and the vehicle is guaranteed.

Description

technical field [0001] The invention relates to a high-voltage power-on circuit of an electric vehicle and a control method thereof. Background technique [0002] During the start-up process of electric vehicles, high-voltage power-on operation is required to complete the high-voltage relay control and pre-charging control process. At present, most high-voltage relays use relays without feedback contacts. During the high-voltage power-on process, the battery management system needs to detect the actual status of the relay and judge possible relay failures to safely realize high-voltage power-on. Therefore, it is necessary to design a reasonable high-voltage power-on circuit and a high-voltage power-on control method. However, the existing electric vehicle high-voltage power-on circuit has a simple topology and cannot be used to detect the actual state of the high-voltage relay. If it fails, it may lead to power-on failure, and even further expand the system failure. Cont...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60L11/18
CPCY02T10/70
Inventor 刘飞文锋阮旭松王占国张金灵
Owner HUIZHOU EPOWER ELECTRONICS
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