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Method for monitoring safety performances of batteries and capacitors on line

A technology of safety performance and capacitors, which is applied in secondary batteries, electrochemical generators, secondary battery repair/maintenance, etc., can solve the problems of non-destructive online detection of battery and capacitor safety performance, etc., to make up for the lack of real-time safety supervision, Make up for the lack of technology and the effect of high application value

Active Publication Date: 2015-05-06
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of the current technology and method for testing the gas behavior of batteries and capacitors and the deformation caused by thermal effects, and to make up for the lack of non-destructive on-line detection of the safety performance of batteries and capacitors, the invention innovatively uses strain gauges to monitor batteries and capacitors and their components on-line non-destructively The safety performance of the power pack or power pack, the strain gauges are reasonably distributed on the surface of the battery and capacitor, and the safety performance is monitored by detecting the strain change of the deformation of the battery and capacitor

Method used

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  • Method for monitoring safety performances of batteries and capacitors on line
  • Method for monitoring safety performances of batteries and capacitors on line

Examples

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Effect test

Embodiment 1

[0023] Multi-channel dynamic resistance strain gauges are used to monitor the safety performance of batteries of different shapes and battery packs in real time for a long time during operation. The schematic diagram of the distribution of foil strain gauges on batteries of different shapes and battery packs is as follows figure 1 As shown, the strain gauges are pasted on the intersection of the face angles of the square battery and the equivalent position on the surface, and the strain gauges are pasted on the center and edge equivalent positions of the circular battery, and the upper, middle, lower positions and edges of the cylindrical battery, etc. The strain gauges are pasted on the effective position, and the battery pack is pasted with strain gauges on the side of each battery. The specific implementation steps are as follows: 1) Strain gauge selection: According to the test requirements, select the foil resistance strain gauge, the strain limit does not exceed 50%, and ...

Embodiment 2

[0025]A multi-channel distributed static resistance strain test is used to monitor the gas safety performance of the button battery during operation. The distribution diagram of the strain gauges on the button battery is shown in figure 2 As shown in Φ0.02~0.05mm constantan wire strain gauge is used to monitor the safety of the button battery, and the strain gauge is firmly bonded to the equivalent position of the center and edge of the button battery through a thin layer of epoxy resin. , in order to ensure insulation, the strain gauge can be sealed, dried with an infrared lamp, the temperature of the bonding surface is controlled not to exceed 40oC, the strain gauge is connected to the computer through the strain gauge for real-time safety performance monitoring, other bonding and testing processes As in Example 1.

Embodiment 3

[0027] Monitoring LiNi Using Strain Tests 1 / 3 co 1 / 3 mn 1 / 3 o 2 The safety performance of soft-packed batteries at room temperature and 80oC flatulence, the distribution of strain gauges on square soft-packed batteries is shown in image 3 As shown, the safety of the square flexible packaging battery is monitored by using Φ0.01~0.03mm nickel-chromium aluminum alloy strain gauges at room temperature and high temperature respectively. At high temperature, temperature compensation is used to slightly scrape the bonding parts of the aluminum-plastic film surface of the flexible packaging to ensure the safety of the battery. Increase the roughness of the surface, firmly bond the strain gauge to the equivalent position of the center and edge of the square battery and the two electrode leads, dry naturally for 15~20h to cure, and connect the strain gauge to the computer through the strain gauge after passing the inspection Real-time safety performance monitoring is carried out, an...

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Abstract

The invention relates to a method for monitoring safety performances of batteries and capacitors on line, belongs to the field of energy security correlation, and aims at effectively monitoring macro-deformation of batteries and capacitors caused by micro strain on line, effectively managing the safety performances such as heat effect and gas inflation in real time, early warning the accident, eliminating the potential safety hazards such as detonation, and analyzing the accident causes on line. According to the technical scheme, a nondestructive strain detection method is adopted, strain gages are distributed on the surfaces of the batteries and capacitors, the strain change in the operating process is monitored in real time, a to-be-failed assembly is subjected to early warning and is processed, the effective safety management of a power supply and in-situ analysis of the failure process and causes can be promoted, and the accident is eliminated in a forming state. The nondestructive method for monitoring the deformation safety performances of batteries and capacitors on line is simple, rapid, accurate and high in operability and is suitable for long-term reliable safety pre-warning and accident analysis of energy devices.

Description

technical field [0001] The invention discloses a non-destructive, online long-term reliable monitoring method for the safety performance of batteries and capacitors, which relates to failure warning and safety monitoring of batteries or capacitors (including electrolytic capacitors and super capacitors) and power packs or power packs composed of them during operation Management, in the field of energy security and related fields. Background technique [0002] Safety issues such as swelling, leakage, explosion, and burning caused by deformation of batteries or capacitors and the power packs or power packs they consist of have greatly affected their wide application, so real-time monitoring of their deformation is conducive to the safety management of power sources. Among the commonly used methods for testing battery deformation at present, the method of measuring size is not only inaccurate, has large errors, but also has high work intensity, which is not suitable for onlin...

Claims

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Application Information

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IPC IPC(8): H01M10/48H01M10/42
CPCH01M10/42H01M10/48Y02E60/10
Inventor 王贵欣周硕闫康平肖遥
Owner SICHUAN UNIV
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