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Battery pack abnormality detection device and battery pack abnormality detection method

An anomaly detection and battery pack technology, applied to batteries, secondary batteries, circuits, etc., can solve problems such as poor performance and inaccurate battery pack detection

Active Publication Date: 2020-12-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to alleviate the problem of inaccurate detection and poor effect in the abnormality detection of battery packs in the related art, the embodiment of the present application provides a battery pack abnormality detection device and a battery pack abnormality detection method

Method used

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  • Battery pack abnormality detection device and battery pack abnormality detection method
  • Battery pack abnormality detection device and battery pack abnormality detection method
  • Battery pack abnormality detection device and battery pack abnormality detection method

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Embodiment Construction

[0106] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the implementation manners of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0107] An embodiment of the present application provides a battery pack abnormality detection device for detecting abnormality of a battery pack of an electric vehicle by using an air pressure sensor and a strain gauge pressure sensor. Among them, the abnormal situation can cover the collision, extrusion, explosion and other situations of the battery pack. The reason why the above-mentioned abnormality detection can be performed on the battery pack by using the air pressure sensor and the strain gauge pressure sensor is based on the following principles:

[0108] 1. According to the ideal gas state equation PV=nRT, it can be known that P refers to the pressure of the ideal gas, V refers to ...

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Abstract

The invention provides a battery pack abnormality detecting device and a battery pack abnormality detecting method, belonging to the field of electric vehicles. The battery pack abnormality detectingdevice comprises an air pressure sensor, a strain type pressure sensor and a processor, wherein the air pressure sensor and the strain type pressure sensor are located in a battery pack; the air pressure sensor is connected with the processor and used for detecting air pressure in the battery pack; the strain type pressure sensor is connected with the processor and used for detecting the pressureof the inner wall of the battery pack; and the processor is used for determining whether the battery pack is abnormal or not on the basis of a first pressure value collected by the air pressure sensorand a second pressure value collected by the strain type pressure sensor, and generates first alarm information under the condition that the battery pack is determined to be abnormal. According to the invention, sensors are placed in the battery pack, so the alarm information generated by the processor on the basis of output pressure data can truly reflect whether the battery pack is really abnormal or not, and detection accuracy is improved.

Description

technical field [0001] The embodiments of the present application relate to the field of electric vehicles, and in particular to a battery pack abnormality detection device and a battery pack abnormality detection method. Background technique [0002] Electric vehicles use battery packs as energy carriers. Nowadays, as the market's requirements for the cruising range of electric vehicles continue to increase, the volume of the battery pack is gradually increasing, and a large amount of energy is stored, which makes the battery pack have the characteristics of high voltage and high current. In this way, when the electric vehicle collides, squeezes or explodes inside the battery pack, the battery pack is very likely to lose control and cause danger. For example, in the event of a collision of an electric vehicle, the battery pack is likely to be damaged due to the impact, resulting in high voltage and high energy release of the battery pack, causing danger. At present, in or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/48
CPCH01M10/482H01M10/488H01M2200/20H01M2220/20Y02E60/10
Inventor 赵玮炜李培才唐康
Owner HUAWEI TECH CO LTD
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