High-speed horizontal impact experiment device for automotive lithium ion batteries

Abstract

The invention belongs to the technical field of battery collision safety testing, and particularly relates to a high-speed horizontal impact experiment device for automotive lithium ion batteries. The device comprises an electromagnetic rail gun launching device and a hanging horizontal impact table which are fixed on the ground, the launching centre of a projectile is coincided with the center of a three-jaw chuck, the electromagnetic rail gun launching device drives the projectile to accelerate by the aid of mechanical energy transformed by electromagnetic energy, the size and the shape of the projectile can be adjusted, the speed and the kinetic energy of the projectile can be accurately controlled, the three-jaw chuck is mounted on the hanging horizontal impact table and used for fixing the batteries, the impact table can arbitrarily rotate, and multi-angle impact working conditions can be achieved. The device is convenient and safe to operate, good in experimental repeatability and accurate and reliable in detection result, the impact energy and speed accuracy can be controlled, a series of change of mechanical, electrical and thermal performances can be quantitatively researched when the batteries are subjected to high-speed impact, and thermal runaway mechanisms after the batteries are subjected to high-speed impact are acquired.

Description

technical field [0001] The invention belongs to the technical field of battery collision safety testing, in particular to a high-speed horizontal impact experiment device for lithium-ion batteries used in vehicles. Background technique [0002] With the increasing promotion of electric vehicles, the safety of vehicle power batteries has become a research hotspot in the field of new energy. Lithium-ion batteries have gradually become the mainstream of automotive power batteries due to their advantages such as high specific energy and specific power, long life, and environmental protection. In electric vehicle traffic accidents, problems such as overheating, fire and explosion caused by collisions seriously restrict the further development of lithium-ion batteries. Therefore, under the condition of high-speed impact, it is very necessary to study the safety of lithium-ion power batteries. [0003] At present, the research on mechanically triggering the thermal runaway of lit...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a high-speed horizontal impact test device for lithium-ion batteries for vehicles, which has large kinetic energy of projectiles, high control precision, good test repeatability, high test result precision, convenient operation, safety and reliability, and solves the problem of existing lithium-ion power testing equipment. The aforementioned deficiencies of battery safety devices

Images