Thermal runaway monitoring device and method for power lithium-ion battery pack

Abstract

A thermal runaway monitoring device and method for a power lithium-ion battery pack, comprising a first unit, a second unit, and a third unit sequentially connected; the first unit is used to collect voltage signals and temperature signals of the battery pack and current signal, and transmit the collected voltage signal, temperature signal and current signal of the battery pack to the second unit; the second unit is used to collect the temperature signal, voltage signal and current signal of the battery pack according to the first unit , monitor the condition or risk of thermal runaway of the battery pack in real time through a set algorithm; the second unit is also used to periodically send the voltage signal, temperature signal and current signal of the battery pack to the third unit. Combining with other structures or methods effectively avoids the defect that the power lithium battery management system in the prior art lacks the method and function of the early prediction and early warning of the thermal runaway of the battery.

Description

technical field [0001] The present invention relates to the technical field of power lithium-ion battery packs, and also relates to the technical field of thermal runaway monitoring, in particular to a thermal runaway monitoring device and method for power lithium-ion battery packs. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes: when charging, Li+ is deintercalated from the positive electrode, intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. [0003] With the increasing use of power lithium-ion battery packs in various fields, vicious accidents caused by the combustion, fire, and explosion of ...

AI Technical Summary

Problems solved by technology

[0003] With the increasing use of power lithium-ion battery packs in various fields, vicious accidents caused by the combustion, fire, and explosion of lithium-ion batteries in power lithium-ion battery packs occur frequently, and most of the fires are caused by lithium-ion batteries. Severe internal short circuit causes the spread of thermal runaway. The power lithium battery management system currently on the market lacks the methods and functions of early prediction and early warning of battery thermal runaway

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