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

Abstract

The invention discloses a thermal runaway monitoring device and method for a power lithium ion battery pack. The thermal runaway monitoring device comprises a first unit, a second unit and a third unit which are sequentially connected, wherein the first unit is used for acquiring a voltage signal, a temperature signal and a current signal of a battery pack and transmitting the acquired voltage signal, temperature signal and current signal of the battery pack to the second unit; the second unit is used for monitoring the thermal runaway condition or risk of the battery pack in real time througha set algorithm according to the temperature signal, the voltage signal and the current signal of the battery pack acquired by the first unit; and the second unit is also used for periodically sending a voltage signal, a temperature signal and a current signal of the battery pack to the third unit through the communication bus. In combination with other structures or methods, the defect that a power lithium battery management system in the prior art lacks an advanced prediction and early warning method and function for battery thermal runaway is effectively avoided.

Description

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

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

Images