Battery thermal runaway trigger and released gas collecting device

Abstract

The invention discloses a battery thermal runaway trigger and released gas collecting device comprising a battery blast protective container body. A container cover on one end of the battery blast protective container body is equipped with an observation window and the other end of the battery blast protective container body is connected with a gas pressure control and acquisition system. The top of the battery blast protective container body is equipped with an anti-explosion pressure release apparatus. A battery thermal runaway trigger assembly, a battery surface temperature sensor, and an ambient temperature sensor are disposed in the battery blast protective container body. The battery surface temperature sensor is disposed on the battery thermal runaway trigger assembly. An air pressure sensor is disposed on the top of the battery blast protective container body. The battery thermal runaway trigger assembly comprises a fixing device and a tested battery sample on the fixing device. The battery thermal runaway trigger and released gas collecting device has a beneficial effect of satisfying a thermal runaway triggering and gas collecting function of batteries in different sizes.

Description

technical field [0001] The invention relates to a battery thermal runaway trigger and release gas collection device. Background technique [0002] The battery may be in a dangerous state when heated, and the risk of thermal runaway of lithium-ion batteries is more significant. In a high-temperature environment, the battery may explode and release a large amount of flammable gas. The impact of battery inflation on battery performance has been widely concerned, but the danger of gas explosion has received little attention. During storage and transportation, a large number of lithium batteries thermally runaway and release gas reaching a certain concentration range. Once they encounter an ignition source, a gas explosion may occur, causing serious accident consequences. [0003] The type of battery has an impact on the potential for thermal runaway of the battery and the characteristics of the outgassing. Lithium-ion batteries with explosion-proof caps also have the character...

AI Technical Summary

Problems solved by technology

In 2014, Vijay Somandepalli et al. took the time when the voltage of a single-cell lithium-ion battery core was zero after heating as the moment when the battery thermal runaway releases gas, and collected the thermal runaway gas of a single-cell lithium-ion battery core by heating in a 10L airtight container for component Test, it is not convenient to observe the phenomenon, so it is difficult to determine the specific stage of battery thermal runaway at the time of collection

Most battery thermal abuse experiments use clamping and fixing methods. The clamping tool loses more heat through heat conduction, and the heating contact area is small, resulting in uneven heating of the battery, which reduces the repeatability of thermal runaway test results.

Images