Battery thermal runaway detection system and detection method thereof

Abstract

The invention relates to the technical field of new energy automobile battery safety monitoring, and particularly relates to a battery thermal runaway detection system. The battery thermal runaway detection system comprises an intelligent instrument, a background monitoring center and a thermal runaway detector arranged in a battery box. The battery thermal runaway detection system is characterized in that the thermal runaway detector comprises a data acquisition device and a master control device. The data acquisition device is used for acquiring the current thermal runaway parameters of all the detection nodes in the battery box and transmitting the current thermal runaway parameters to the master control device. The master control device comprises a CPU core processing module, a communication transmission module and a performing device control module. The invention also relates to a battery thermal runaway detection method comprising the steps that whether a flame value is greater than or equal to the preset flame threshold is judged; data filtering is performed on temperature, gas and smoke parameters so that characteristic values are extracted; and the parameters are comprehensively processed so that starting a fire-extinguishing device or giving a warning signal is determined. The beneficial effects are that the detection system is enabled to accurately grasp the fire extinguishing time so that the hidden trouble can be timely disposed.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle battery safety monitoring, in particular to a battery thermal runaway detection system and a detection method thereof. Background technique [0002] The safety accidents of electric vehicles mainly come from the combustion or explosion caused by the thermal runaway of batteries. As the energy storage unit of electric vehicles, if the energy is released through combustion or explosion, the power is extremely powerful, which can easily cause casualties. The reason for battery thermal runaway leading to combustion or explosion is that the heat generated by the thermal runaway of a certain battery cell cannot be effectively dissipated, and it gathers together to form a high-temperature environment, resulting in chain thermal runaway of adjacent batteries, and then the heat continues to accumulate, leading to combustion or explosion. If the heat is effectively dissipated or guided in the ear...

AI Technical Summary

Problems solved by technology

Its disadvantages: 1. Data analysis can only determine the approximate time range of combustion caused by thermal runaway, but cannot determine the exact moment when open flames appear, and miss the best time to start the cooling / fire extinguishing device; It may cause mishandling, such as erroneously starting the fire extinguishing device, resulting in damage to the entire battery box, so that the entire battery box needs to be replaced due to the activation of the fire extinguishing device.

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