Lithium-ion battery pack thermal runway automatic alarming apparatus based on gas monitoring and monitoring method

Abstract

The invention discloses a lithium-ion battery pack thermal runway automatic alarming apparatus based on gas monitoring and a monitoring method, and relates to a thermal runway alarming device for letting out flammable and combustible gas for real-time monitoring and timely alarming during battery thermal runway aiming at the warehousing and charging process of a lithium-ion battery pack. The lithium-ion battery pack thermal runway automatic alarming apparatus is composed of a collecting device, a gas monitoring device, a controlling device and an alarming device, wherein the collecting deviceis composed of a collecting hood, a back-fire relief valve and a gas pump; the collecting hood is installed above a positive electrode of the lithium-ion battery pack, and is connected with a gas inlet of the gas pump through a gas pipeline, and the gas pipeline is internally provided with the back-fire relief valve; the gas monitoring device is composed of a gas collector, a gas sensor and a Dupont line. A gas outlet of the gas pump is connected with the gas collecting box, and the gas collecting box is internally provided with the gas sensor; the controlling device is composed of a control box, a single-chip microcomputer, a gas sensor, a gas sensor interface and a control electric circuit; the alarming device is composed of a blue LED alarming lamp, a red LED alarming lamp and a buzzer.

Description

technical field [0001] The invention relates to a thermal runaway automatic alarm for lithium-ion battery packs based on gas monitoring and a monitoring method thereof, which relates to a thermal runaway alarm device for lithium-ion battery packs during storage and charging in a warehouse. Real-time monitoring and alarm in case of flammable and explosive gas. Background technique: [0002] With the continuous increase of people's demand for efficient and convenient energy sources, batteries are more and more widely used in all aspects of life and production activities. Especially lithium-ion batteries, which have the advantages of high capacity, high working voltage, long cycle life, low self-discharge, fast charge and discharge, etc., have been applied to most areas of people's daily life, such as mobile phones, computers, Electric vehicles, charging treasures and other fields. [0003] In the process of production, storage, transportation, and high-rate charging and disc...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the prediction and early warning systems for lithium-ion batteries use temperature sensors to make predictions, and most of the current prediction and early warning systems are for a single battery, but cannot predict and early warning for the battery pack as a whole.

Lithium-ion battery packs will burn or explode when thermal runaway occurs, and release toxic and flammable gases, causing casualties and property damage

Images