Safety monitoring method and device for a power battery system

A power battery and safety monitoring technology, which is applied in battery/fuel cell control devices, measuring devices, measuring electricity, etc., can solve problems such as battery errors and false detections, avoid misjudgments and missed judgments, reduce human injuries and The effects of property damage

Active Publication Date: 2019-04-05
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain errors in the above two patents when judging battery safety issues
Especially for a battery system without a thermal equalization device, the error of this method of judging battery safety hazards based on battery temperature is more obvious, and there are false detections

Method used

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  • Safety monitoring method and device for a power battery system
  • Safety monitoring method and device for a power battery system
  • Safety monitoring method and device for a power battery system

Examples

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] The method and device for safety monitoring of a power battery system according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0027] figure 1 is a flow chart of a safety monitoring method for a power battery system according to an embodiment of the present invention. Such as figure 1 As shown, the safety monitoring method of the power battery system according to the embodiment of the present invention includes the following steps:

[0028] S1: Obtain t...

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Abstract

The invention discloses a safety monitoring method and apparatus of a power battery system. The safety monitoring method includes acquiring the real-time temperature distribution of the power battery system; determining whether the real-time temperature distribution matching the calibration temperature distribution of the power battery system; if no, acquiring a voltage of one or more target cells corresponding to the high temperature position in the real-time temperature distribution; determining whether the voltage of the one or more target cells is abnormal; and if yes, determining the power battery system having safety hidden troubles. According to the safety monitoring method, the safety state of the power battery system can be timely, accurately, and comprehensively determined based on the obtained voltage, current, temperature or other parameters, the misjudgement and missed judgement of the safety accidents can be prevented, and the manpower damage and property loss can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a safety monitoring method and device for a power battery system. Background technique [0002] As a key component of electric vehicles, the safety of power batteries has attracted extensive attention. There will be some symptoms before the safety problem of the power battery. Even if there is a sudden safety problem (such as an internal short circuit), there will be a certain period of time from the short circuit of the power battery to the complete thermal runaway. If the safety status of the power battery can be judged in time before a safety accident occurs, serious personal and property losses can be avoided. [0003] Patent CN102565611B discloses a method for detecting an internal short circuit of a power battery, which detects hidden dangers of an internal short circuit by detecting voltage changes of the power battery, thereby avoiding safety risks of the powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
CPCB60L58/10G01R31/3646G01R31/382Y02T10/70
Inventor 李宁盛军刘凤月陈卓袁文静荣岩杨重科
Owner BEIJING ELECTRIC VEHICLE
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