Lithium battery thermal runaway monitoring alarm sensing device

Abstract

The invention discloses a lithium battery thermal runaway monitoring alarm sensing device. A mounting disc is provided with a mounting position, a sensor element is mounted on the mounting position, abuffer material is filled between the sensor element and the mounting disc, the surface of the buffer material is provided with a metallization part, and the bottom of the mounting disc is provided with a buffer layer. The lithium battery thermal runaway monitoring, alarming and sensing device is optimally designed, a plurality of sensors of a sensor element are integrated on a mounting disc, standardized production of the sensing device for the lithium battery in the vehicle-mounted environment is conveniently realized, so that the sensor has high integration level and high stability when being used for monitoring the lithium battery in the vehicle-mounted environment, early detection and warning of thermal runaway of the lithium battery can be realized, and the thermal runaway monitoring and warning requirements of equipment such as a power lithium battery box and a UPS standby power supply are met.

Description

technical field [0001] The invention relates to the technical field of new energy safety, in particular to a lithium battery thermal runaway monitoring and alarm sensing device. Background technique [0002] With energy conservation and emission reduction, reducing energy dependence has gradually become the development trend of the international automobile industry and environmental protection industry. New energy vehicles, as the development of alternative energy and the construction of a sustainable low-carbon society, have been highly valued by countries all over the world. Our government has also officially List new energy vehicles as one of the seven strategic industries. China has become the world's largest automobile producer and consumer. It is estimated that by 2030, the number of passenger cars in China will reach 250 million. However, due to the defects in the production and manufacturing process of the battery itself, and the serious abuse of lithium batteries, ...

AI Technical Summary

Problems solved by technology

However, due to the defects in the production and manufacturing process of the battery itself, and the serious abuse of lithium batteries, accidents of burning and explosion of lithium batteries have occurred from time to time. In 2019 alone, more than 50 accidents occurred, seriously endangering the lives of the people. , property safety, resulting in bad social impact

In this context, there are discrete power lithium-ion battery box thermal runaway monitoring and alarm devices from different manufacturers emerging on the market, but their performance is uneven and there is a lack of corresponding standards to judge them.

[0003] Existing thermal runaway of lithium batteries usually uses temperature monitoring, usually by setting the temperature threshold to warn of thermal runaway events, only using the temperature threshold as the basis for judging thermal runaway, its accuracy depends on the location and environment where the temperature sensor is installed, it is difficult to quickly and accurately Reliable early warning of thermal runaway, only using fixed thresholds to judge is often affected by environmental factors and misjudgments or missed judgments occur

For the current power battery box composed of hundreds of batteries in electric vehicles, the existing multi-sensor monitoring system is poor in economy and applicability, and can only warn of thermal runaway for specific types of batteries and specific laboratory environments , for different application environments of on-board lithium batteries, misjudgments or missed judgments may occur due to the influence of environmental factors in practical applications

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