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Battery pack fault detection method and device

A fault detection and battery pack technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as excessive protection, unable to ensure accurate identification of battery pack faults, leakage diagnosis, etc.

Inactive Publication Date: 2019-07-05
BORGWARD AUTOMOTIVE CHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex working conditions during the driving process of the car, setting one or several threshold values ​​cannot guarantee accurate identification of battery pack faults, and may cause missed diagnosis or over-protection

Method used

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  • Battery pack fault detection method and device
  • Battery pack fault detection method and device
  • Battery pack fault detection method and device

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Embodiment Construction

[0098] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementations described here are only used to illustrate and explain the present disclosure, not to limit the present disclosure.

[0099] figure 1 It is a flow chart of a battery pack fault detection method according to an exemplary embodiment of the present disclosure. Such as figure 1 As shown, the method includes steps 101 to 104.

[0100] In step 101, relevant state information in the battery pack and the detected temperature at the current moment of the detection point in the battery pack are acquired. The relevant information in the battery pack can include any relevant information that can describe the state of the battery pack, for example, it can be the detected temperature of each detection point in the battery pack at other times, or the input and output current, voltage or The remaini...

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Abstract

The present invention relates to a battery pack fault detection method and device and belongs to the field of batteries. The method includes the following steps that: relevant state information in a battery pack and the detected temperatures of detection points in the battery pack at the current time are acquired; the estimated temperatures of the detection points are acquired according to the relevant state information and on the basis of a battery pack thermal model; whether the detection points are abnormal is judged according to the estimated temperatures and the detection temperatures ofthe current time; and the fault of the battery pack is judged according to abnormal detection points. With the battery pack fault detection method and device adopted, the possible temperatures of thedetection points in the battery pack can be estimated in real time according to the battery pack thermal model; with the possible temperatures adopted as standards, the possible temperatures are compared with the actually obtained temperatures of the detection points, and therefore, whether the temperatures of the detection points are abnormal can be judged; and therefore, the problem of failure to perform adjustment according to the working condition of a vehicle caused by sthe singleness of threshold value judgment conditions can be avoided, and fault points can be determined according to the abnormal detection points, and positions where faults occur can be accurately judged.

Description

technical field [0001] The present disclosure relates to the field of battery packs, and in particular, to a battery pack fault detection method and device. Background technique [0002] Battery packs are used in many industries and fields, especially under the premise that new energy vehicles have become a new trend and an important direction for the development of the automotive industry, in pure electric vehicles and hybrid vehicles in new energy vehicles, power battery packs are mostly used as Primary electrical energy storage device. However, the power battery pack is greatly affected by temperature, so the thermal management system of the battery pack is often used to control the temperature of the power battery pack in applications. Usually, the temperature detection for the battery pack is usually realized through the logic threshold value, by collecting the temperature, voltage, current and other values ​​of each battery cell or battery module in the battery pack, ...

Claims

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Application Information

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IPC IPC(8): G01R31/382G01R31/396G01R31/367
CPCG01R31/396G01R31/367
Inventor 王言子
Owner BORGWARD AUTOMOTIVE CHINA CO LTD
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