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Sensor for detecting deformation of sealed secondary battery, sealed secondary battery, and method for detecting deformation of sealed secondary battery

A technology for detecting sensors and secondary batteries, used in secondary batteries, secondary battery manufacturing, and secondary battery repair/maintenance, etc. Effects of Sensitivity Deformation

Inactive Publication Date: 2017-02-15
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Such a secondary battery has a problem in that when the electrolyte solution is decomposed due to overcharging, etc., the single cell expands due to an increase in the internal pressure caused by the decomposed gas, thereby deforming the secondary battery.
However, in the method of using such a strain gauge, there is a risk that the sensor characteristics will fluctuate and the stability will decrease due to vibration, especially during long-term use.

Method used

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  • Sensor for detecting deformation of sealed secondary battery, sealed secondary battery, and method for detecting deformation of sealed secondary battery
  • Sensor for detecting deformation of sealed secondary battery, sealed secondary battery, and method for detecting deformation of sealed secondary battery
  • Sensor for detecting deformation of sealed secondary battery, sealed secondary battery, and method for detecting deformation of sealed secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Into the reaction container, 85.2 parts by weight of polyol A was added, and dehydration under reduced pressure was performed for 1 hour while stirring. Then, the interior of the reaction vessel was purged with nitrogen. Next, 14.8 parts by weight of TDI-80 was added to the reaction container and reacted for 5 hours while keeping the temperature in the reaction container at 80° C. to synthesize isocyanate-terminated prepolymer A (NCO%=3.58%).

[0107]Then, in 106.5 parts by weight of polyol C (polyether modified main chain type reactive siloxane, OHV 56, functional group number 2, manufactured by Shin-Etsu Chemical Co., Ltd., X-22-4272) and 0.24 parts by weight of bismuth octoate ( 31.0 parts by weight of toluene was added to the mixed liquid manufactured by Nippon Chemical Industry Co., Ltd., PUCAT 25), and 206.5 parts by weight of neodymium-based filler (manufactured by Aichi Steel Works Co., Ltd., MF-15P) was added thereto to prepare a filler dispersion liquid . Fu...

Embodiment 2～6、 comparative example 1～2

[0109] Based on the formulation and production conditions of Table 2, a magnetic polyurethane resin was obtained in the same manner as in Example 1.

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Abstract

The purpose of the present invention is to provide: a sensor for detecting the deformation of a sealed secondary battery and capable of detecting the deformation of a sealed secondary battery caused by the swelling of a single cell with a high degree of sensitivity across a broad temperature range; a sealed secondary battery; and a method for detecting the deformation of a sealed secondary battery. A sensor for detecting the deformation of a sealed secondary battery and provided with a polymer matrix layer and a detection unit, wherein the polymer matrix layer contains a filler dispersed therein which imparts a change to an external field according to the deformation of the polymer matrix layer, the detection unit detects changes in the external field, and the glass transition temperature (Tg) of the polymer matrix layer is -30 DEG C or lower.

Description

technical field [0001] The present invention relates to a sensor for detecting deformation of a sealed secondary battery, a sealed secondary battery mounted with the sensor, and a method for detecting deformation of a sealed secondary battery. Background technique [0002] In recent years, sealed secondary batteries represented by lithium-ion secondary batteries (hereinafter, sometimes simply referred to as "secondary batteries") have been used not only as power sources for mobile devices such as mobile phones and notebook computers, but also as electric vehicles or hybrid batteries. Power supply for electric vehicles such as electric vehicles. A single cell (cell) constituting a secondary battery has an electrode group in which a positive electrode and a negative electrode are wound or laminated with a separator interposed therebetween, and an exterior body accommodating the electrode group. Usually, a laminated film or a metal can is used as an exterior body, and an elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M10/04H01M50/204
CPCG01B7/24H01M10/482H01M2220/20Y02E60/10Y02P70/50H01M50/204H01M10/48H01M50/124H01M10/425H01M10/34G01D5/145
Inventor 福田武司太田贵启
Owner TOYO TIRE & RUBBER CO LTD
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