Thermal runaway simulation device for battery system

Abstract

The invention provides a thermal runaway simulation device for a battery system. The device comprises an explosion-proof box, a battery cell group, a heating device, a voltage acquisition instrument,a multi-path temperature measurement instrument, a pressure detector, a gas detector and a video monitor; the battery cell group is mounted on a bracket in the explosion-proof box and includes a battery cell (21), a battery cell (22) and a battery cell (23), wherein the battery core (22) and the battery core (23) are connected in parallel, and the battery core (21) is independently installed; andthe heating device continuously and stably heats the battery core (22). With the thermal runaway simulation device for the battery system of the invention adopted, the critical temperature, critical voltage and critical pressure of the battery cores during thermal runaway can be obtained; change relationships between the voltages, temperatures and pressures of the battery cores during the thermalrunaway can be monitored in real time; basic data can be provided for various battery core anomaly processing devices, and better and more accurate analysis can be performed; the data collect influence relationships between the battery cores, and better data support can be provided for guiding the development and design of the battery cores.

Description

[0001] 【Technical Field】 [0002] The invention relates to a thermal runaway simulation device of a battery system. [0003] 【Background technique】 [0004] With the popularity of electric vehicles, lithium-ion batteries are playing an increasingly important role in people's lives. Use problems such as low energy density and limited cycle life are often criticized by people, but compared with these problems, battery safety is the primary focus of people’s attention; in recent years, accidents caused by battery safety problems abound, and many problems The consequences are shocking; with the increasing production and sales of new energy vehicles and more and more fire accidents, people have paid unprecedented attention to the safety of batteries. [0005] Existing battery cell abnormality handling devices, such as automatic battery explosion-proof devices, will cool the cells, spray them, and inhale the air from the battery box to isolate the cells when they are abnormally warmed up; a...

AI Technical Summary

Problems solved by technology

[0006] However, the existing thermal runaway simulation device only processes and collects information for a single battery cell, and the design of the simulation equipment is relatively complicated, and the damage to the instrument caused by the explosion is also serious, which makes the cost higher; After the thermal runaway of the battery cells, the mutual influence of each battery cell is also extremely critical data

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