Battery expansion displacement and temperature in-situ measurement device

Abstract

The invention discloses a battery expansion displacement and temperature in-situ measurement device, and the device comprises a fixing device which is provided with a plurality of sensor clamps surrounding a preset position of a battery; the clamping device is mounted on the fixing device and is used for clamping two opposite end surfaces of the battery respectively, so that the battery is fixed at a preset position of the battery; the clamping device comprises a cylindrical battery clamping device for clamping a cylindrical battery and a square battery clamping device for clamping a square battery; and the measuring device comprises a plurality of dial indicators and / or infrared temperature sensors which are respectively arranged on the sensor clamp and are used for measuring the temperature and displacement of the side surface of the battery. The device can be used for simultaneously measuring the radial displacement or the surface temperature of the cylindrical batteries with multiple sizes in the working process in situ. And a special clamp is adopted to adapt to batteries with different sizes.

Description

technical field [0001] The invention relates to the field of battery measurement, in particular to an in-situ measuring device for battery expansion displacement and temperature. Background technique [0002] As a mobile power source, lithium batteries are widely used in new energy fields such as power batteries and energy storage power stations, as well as in our daily production and life. During the use of the battery, it is bound to be accompanied by the generation of expansion displacement and temperature changes, which have a great impact on the capacity and life of the battery and other battery performance. Therefore, the expansion displacement and temperature changes of the battery have always attracted people's attention. . In this context, the device for simultaneous in-situ measurement of the expansion displacement and temperature of the battery came into being, but there is little research on the device for the simultaneous in-situ measurement of the radial displ...

AI Technical Summary

Problems solved by technology

[0004] 1. Most of the current measuring devices are mainly for measuring square batteries, and there is a lack of measuring devices for radial displacement and temperature of cylindrical batteries;

[0005] 2. The current in-situ measurement device usually measures the radial displacement and temperature separately, that is, after decoupling, and can not complete the simultaneous in-situ measurement of the radial displacement and temperature of the battery during the charging and discharging process of the battery. Facilitate the analysis of real correlations in multi-field coupling scenarios;

[0006] 3. The current battery in-situ measurement and measurement device basically cannot realize the simultaneous measurement of temperature and expansion displacement of square batteries and cylindrical batteries on the same measurement platform;

[0007] 4. Most devices cannot realize the simultaneous measurement of radial displacement and temperature of cylindrical batteries and prismatic batteries, which does not conform to the actual multi-physics process, has poor reliability, and the measurement conditions are very harsh, usually requiring the assistance of large-scale equipment such as a constant temperature box Measuring, practical and economical are poor

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