Surface temperature over-standard detection coating layer of lithium ion battery

Abstract

The invention belongs to the technical field of a lithium ion battery, and particularly relates to a surface temperature over-standard detection coating layer of the lithium ion battery. The surface temperature over-standard detection coating layer is arranged on a surface of a battery shell and comprises the following constituents based on parts by mass: 30-70 parts of flax oil modified phenolicresin, 10-40 parts of polyurethane resin, 1-10 parts of phenyl salicylate, 1-10 parts of organic solvent and 2-20 parts of irreversible temperature-changing developing pigment, wherein the color-changing temperature of the irreversible temperature-changing developing pigment is 65 DEG C. By the coating layer, the temperature state of the battery can be effectively detected, and reliable reason analysis and prevention can be performed on a failure battery or a battery to be failure.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a coating for detecting excessive surface temperature of lithium-ion batteries. Background technique [0002] Lithium-ion batteries have many advantages such as high energy density, high output power, long charge and discharge life, no pollution, wide operating temperature range and small self-discharge, and are widely used in various portable electronic devices. According to the shape of the battery, lithium-ion batteries can be divided into cylindrical lithium-ion batteries, square lithium-ion batteries and button lithium-ion batteries. [0003] At present, there is a risk of battery failure or even explosion due to improper use of cylindrical lithium-ion batteries during use, resulting in excessive battery temperature. Because the chemical reaction inside the battery is closely related to the temperature, the heat generated by the battery is differen...

AI Technical Summary

Problems solved by technology

[0003] At present, there is a risk of battery failure or even explosion due to improper use of cylindrical lithium-ion batteries during use.

Because the chemical reaction inside the battery is closely related to the temperature, the heat generated by the battery is different under different conditions of use. If the battery temperature is not detected, the battery temperature will rise significantly, which will affect the use of the battery and even cause safety problems.

The currently used temperature detection device is mainly aimed at the battery pack, and the device is relatively complicated and cumbersome. It can only indicate the battery temperature in real time, and cannot simply and intuitively display whether the battery temperature exceeds the applicable range.

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