Battery pack high-voltage relay functional response fault diagnosis method and device

A technology of high-voltage relays and battery packs, applied in measuring devices, circuit breaker tests, instruments, etc., can solve problems such as sticking faults, sticking faults, and inability to accurately determine the type of relay faults

Active Publication Date: 2018-11-06
氢驰动力科技山西有限公司
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  • Abstract
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Problems solved by technology

[0003] However, in the process of implementing the embodiments of the present invention, the inventors found that there are at least the following problems in the prior art: the prior art cannot realize fault detection f

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  • Battery pack high-voltage relay functional response fault diagnosis method and device
  • Battery pack high-voltage relay functional response fault diagnosis method and device
  • Battery pack high-voltage relay functional response fault diagnosis method and device

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Embodiment Construction

[0043] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0044] figure 1 A schematic diagram of a dual power battery pack is shown. Such as figure 1As shown, the battery pack 1 is the main power supply of the vehicle, and the battery pack 2 is the backup power supply, which provides a power source for the vehicle through a fast charging port (not shown in the figure). During the operation of the vehicle, always ensure that only one battery pack is in the high-voltage connection state, ...

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Abstract

The invention discloses a battery pack high-voltage relay functional response fault diagnosis method and device. The method includes the following steps that: a pre-charge relay pull-in instruction, apre-charge relay disconnection instruction, a main negative relay pull-in instruction, a pre-charge relay pull-in instruction, a main positive relay pull-in instruction and a pre-charge relay disconnection instruction are sequentially transmitted according to a high-voltage electrification process; after the instructions are transmitted, voltage and/or current parameters are collected; and whether high-voltage relays undergo functional response faults is detected according to the parameter values of the collected voltage and/ or current parameters or the change conditions of the parameter values, and the types of the faults are distinguished. With the battery pack high-voltage relay functional response fault diagnosis method and device provided by the technical schemes of the invention adopted, the fault problems of the high-voltage relays in a battery pack can be found in time according to the collected voltage and current parameters. The diagnosis method and device of the inventioncan be applied to the detection of the functional response faults of the high-voltage relays of each battery pack in a vehicle provided with a plurality of battery packs.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a method and device for diagnosing functional responsive faults of high-voltage relays of battery packs. Background technique [0002] The power battery is used as the capacity output circuit of the electric vehicle new energy vehicle, and its energy output is realized by switching on and off multiple high-voltage relays, including the main positive relay, the main negative relay and the pre-charging relay. Usually, the fault behavior that the high-voltage relay cannot correctly respond to the relay pull-in command or the relay disconnection command issued by the battery management system is collectively referred to as the functional response fault of the relay. If one or more of the multiple high-voltage relays has a functional response failure, it will affect the energy output of the power battery, thereby affecting the use of new energy vehicles, and even causing safet...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3275
Inventor 谷峰
Owner 氢驰动力科技山西有限公司
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