A heat -out -and -sensitivity alarm device of a car lithium -ion power battery and its detection method

Abstract

The present invention disclosed a thermal discharge gas -sensitive alarm device of the car lithium -ion power battery, including: the box; the interval of multiple battery packaging modules is set inside the box, and the interior of multiple battery packaging modules is set up with uniform arranged arrangesThe battery monomer, multiple battery packaging modules is the cooling flow field channel; the gas sensitive sensor is set at the exit location of the cooling flow field channel; multiple thermocouple temperature sensors are evenly arranged inside the multiple battery packaging modules;The corresponding quality sensor is set to the lower part of the battery monomer; the management device is connected to the gas -sensitive sensor, multiple thermocouple temperature sensors, and multiple quality sensors.The present invention also disclosed the detection method of the thermal discharge gas -sensitive alarm device of the car lithium -lyric power battery. The probability of the battery thermal outlet is determined by establishing the Malcov chain prediction model, and the battery is used to cool the battery and conduct drivers and passengers.remind.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery safety, and more particularly, the invention relates to a thermal runaway gas-sensing alarm device of a vehicle-mounted lithium-ion power battery and a detection method thereof. Background technique [0002] Lithium-ion batteries have become the mainstream choice for automotive power batteries due to their high capacity, high output voltage, high charging rate, high energy density, low self-discharge and excellent cycle characteristics. However, the high activity of its electrode materials and the flammability of electrolyte materials determine that the risk of thermal runaway in lithium-ion batteries always exists. In recent years, with the growth of the electric vehicle market and the improvement of its power performance, vicious safety accidents caused by the thermal runaway of on-board lithium-ion power batteries have occurred frequently, which seriously damaged consumers' confiden...

AI Technical Summary

Problems solved by technology

However, this thermal runaway early warning method based on the characterization of a single external parameter has a high probability of false alarms and missed alarms, and the early warning time lags, making the intervention window of subsequent active safety measures too small and the effect weak

[0006] And as the working substance of the forced fire extinguishing system, the thermal runaway blocker represented by chlorofluorocarbons will quickly deplete the free radicals of thermal runaway monomers, and at the same time make other intact battery cells in the same module due to chemical activity. Lost and scrapped

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