Testing method and testing system for thermal protection structure for thermal expansion between battery cells

Abstract

The invention provides a test method and a test system for a thermal protection structure for thermal expansion between battery cells. The method specifically comprises the steps that A, a first battery cell and a second battery cell are adjacently arranged, a first thermal protection structure is arranged between the first battery cell and the second battery cell to form a first test piece, and the first thermal protection structure is connected with one side face of the first battery cell and one side face of the second battery cell; b, a first end plate and a second end plate are arranged on the other side face of the first battery cell and the other side face of the second battery cell respectively, and the first end plate and the second end plate are pressed on the first end plate and the second end plate through a clamping mechanism, so that the first test piece is pressed; and step C, taking one of the first battery cell and the second battery cell as a target battery cell, taking the other one as a test battery cell, performing thermal runaway on the target battery cell, and monitoring the temperature and voltage change of the test battery cell after the thermal runaway of the target battery cell. The test piece can be quickly assembled, and the test efficiency is improved.

Description

technical field [0001] The present application relates to the field of battery cell testing, in particular to a test method and a test system for a thermal protection structure for thermal expansion between battery cells. Background technique [0002] With the continuous development of new energy vehicle technology, the number of new energy vehicles in my country is increasing day by day, and the country has higher and higher requirements for the performance of new energy batteries, such as the rapid increase in battery size, battery capacity and battery energy density requirements, but in meeting these At the same time as the requirements, the energy and explosive force released by the single battery when it is thermally out of control will also increase exponentially. The resulting safety problems such as charging failure, battery performance degradation, and vehicle spontaneous combustion are also increasing and cannot be ignored. [0003] Under extreme conditions, thermal...

AI Technical Summary

Problems solved by technology

[0005] During the test, the battery cells are usually fixed in a box. The disadvantage of using a box to fix is ​​obvious. Not only does it require more materials, resulting in higher costs, but also requires custom processing of different sizes of boxes for different sizes of batteries, which affects Test efficiency and test progress

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