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High-voltage circuit of electric vehicle power battery and failure processing method

A fault handling method and power battery technology, which are used in electric vehicles, battery/fuel cell control devices, electric traction, etc., can solve the problems of high requirements for the programming of the vehicle controller and hidden safety hazards, so as to ensure safety and ensure driving. safe effect

Active Publication Date: 2017-05-10
WEICHAI POWER CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a high-voltage circuit and a fault handling method for the power battery of an electric vehicle to solve the problem in the prior art caused by high-voltage disconnection of the vehicle during high-speed operation or high requirements for programming of the vehicle controller. Issues with potential safety hazards

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  • High-voltage circuit of electric vehicle power battery and failure processing method
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  • High-voltage circuit of electric vehicle power battery and failure processing method

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Embodiment Construction

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0061] The invention provides a fault handling method for a power battery of an electric vehicle to solve the problem in the prior art that there is a potential safety hazard due to high voltage interruption of the vehicle during high-speed operation or high requirements for programming of the vehicle controller.

[0062] The fault handling method of the power battery of the electric vehicle is applied to the battery management system of the electric vehicle, s...

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Abstract

The invention provides a high-voltage circuit of an electric vehicle power battery and a failure processing method. The failure processing method is applied to a battery management system of an electric vehicle without depending on a vehicle control unit. The failure processing method includes the steps that when the power battery has a serious failure, if the speed of the electric vehicle is larger than a speed threshold value, the failure duration of the power battery is larger than first preset duration, connection between first-grade electric parts, such as a power-assisted steering pump and a brake air pump, of the electric vehicle and the power battery is kept by controlling a contactor in the high-voltage circuit of the electric vehicle power battery, it is avoided that the power battery has the failure to cause the vehicle high-voltage outage leading to steering failure or brake failure, and drive safety is ensured; meanwhile second-grade electric parts of the electric vehicle are disconnected from the power battery to ensure safety of the power battery.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a high-voltage circuit and a fault handling method for a power battery of an electric vehicle. Background technique [0002] At present, the fault response of the power battery system of electric vehicles is mainly determined according to the fault level of the power battery; specifically, when the power battery has a general fault, the power battery will send a power reduction message, and the vehicle controller will The message reduces the power of the vehicle; and when the power battery fails seriously, the power battery system will cut off the contactor to ensure the safety of the power battery. [0003] In the prior art, in the power battery system of electric vehicles, the on-off of the contactor is controlled by BMS (Battery Management System, battery management system). If the power battery fails seriously, the power battery system itself can automatically cut o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L11/18
CPCB60L3/0046B60L58/10B60L2240/12B60L2240/54Y02T10/70
Inventor 郗富强刘信奎马学龙李可敬
Owner WEICHAI POWER CO LTD
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