A detection device and detection method for micro-short circuit inside a battery

A detection device and detection method technology, which is applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problem that it is difficult to detect the micro-short circuit phenomenon of the battery, and achieve the effect of improving safety

Active Publication Date: 2020-11-24
SHENZHEN ZHONGNENGDA AUTOMATION EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the uncertainty of the occurrence of micro-short circuits in products that have experienced micro-short circuits, it is difficult to detect micro-short circuits in batteries

Method used

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  • A detection device and detection method for micro-short circuit inside a battery
  • A detection device and detection method for micro-short circuit inside a battery

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the present invention clearer, the various embodiments to be described below will refer to the corresponding drawings, and these drawings constitute a part of the embodiments, which describe various possible implementations of the present invention. kind of embodiment. It is to be understood that other embodiments may be utilized or structural and functional modifications may be made to the embodiments set forth herein without departing from the scope and spirit of the present invention.

[0037] During the formation process of the battery, the internal temperature of the battery rises, and the pressure will increase with the temperature rise. The burrs or impurities will pierce the electrolytic paper due to the pressure, causing an instant short circuit or explosion. Due to the large capacity of the battery, when there is a micro-short circuit caused by internal burrs or impurities, the micro-short cir...

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Abstract

The invention provides a detection device for internal micro-short circuit of the battery. The invention continuously monitors the battery during the charging process of the battery. The key point of the invention is to use a differential circuit to filter out rapidly changing voltage signals. The present invention uses the characteristics of the differential circuit to isolate the DC voltage of the battery, and at the same time sends the separated small variable voltage signal to the amplifier for amplification, which reduces the requirements for high-precision instruments, and adopts a high-speed AD converter to amplify the amplified signal Acquisition is carried out, and the captured voltage change signal is transmitted to the computer through the single-chip microcomputer, and finally the product with a small internal short circuit is judged. Moreover, forward amplification or direction amplification can be performed, and secondary amplification can be performed to more effectively and accurately detect the subtle voltage or current changes of the battery, so as to detect problematic batteries or observe the battery status at any time to estimate the service life of the battery.

Description

technical field [0001] The invention relates to a detection device inside a battery and a detection method thereof. Background technique [0002] At present, there are sometimes some technical problems in the production process of the battery, for example, the electrode foil will produce burrs when cutting the edge, or the electrolyte and electrolytic paper contain impurities, etc.; as the battery charging voltage increases and the internal temperature of the battery increases, The burrs or impurities in the battery will pierce the electrolytic paper to cause instantaneous discharge, and at the same time, a large amount of heat energy will be generated, ranging from carbonization of the electrolytic paper to severe battery fire and explosion. The position where the short circuit occurs will vaporize the electrolyte due to the high temperature, and the electrolytic paper will dry up and temporarily become an insulating state, but it will be immersed in the electrolyte again t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/389G01R31/367
CPCG01R31/367G01R31/389
Inventor 唐元安廖文昌
Owner SHENZHEN ZHONGNENGDA AUTOMATION EQUIP CO LTD
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