Device for testing thermal runaway inhibition efficiency of battery pack thermal management systems

Abstract

The invention discloses a device for testing thermal runaway inhibition efficiency of battery pack thermal management systems. The device comprises a testing portion, a battery thermal runaway triggerportion, a battery state monitoring portion, an emergency extinguishment portion, a smoke detection system and an intelligent control system. The device has advantages that thermal runaway triggeringof lithium ion battery packs with or without thermal management systems is realized in various ways, various extreme and misuse conditions of the battery packs in electric vehicles can be simulated;by acquisition of temperature, voltage, current and thermal generation characteristics and generated smoke components and toxicity of the battery packs before and after providing of the thermal management systems, thermal runaway generation and spreading inhibition efficiency of the battery pack thermal management system is systematically tested, efficient extinguishment of fire possibly caused bythermal runaway tests is realized, and accordingly personnel and equipment safety is guaranteed; in addition, data and technical supports can be provided for assessment of reliability and safety of the thermal management systems, and high practical value and important significance to improvement of safety of the electric vehicles are realized.

Description

technical field [0001] The invention belongs to the technical field of secondary battery testing for electric vehicles and energy storage power stations, and in particular relates to a testing device for thermal runaway suppression performance of a thermal management system of a battery pack. Background technique [0002] With the increasing development of electric vehicles, the importance of the thermal management system of the on-board battery pack is rapidly increasing. However, in recent years, frequent electric vehicle fire accidents have shown that there are still considerable safety hazards in the current thermal management application of lithium-ion battery packs. Generally, most battery pack thermal management systems can control the battery within a safe range under normal charging and discharging conditions. However, when it is abused or the inconsistency between single cells is serious, it is very easy to induce thermal runaway of individual single cells, releas...

AI Technical Summary

Problems solved by technology

[0003] At present, the thermal runaway abuse test device for single lithium-ion batteries has been developed relatively well. However, due to the high risk of thermal runaway of the battery pack, the device that can complete the thermal runaway abuse test of the battery pack under safe and controllable conditions Relatively scarce, the device that can test the abuse and thermal runaway of the battery pack equipped with the thermal management system is even rarer, and the test device for the thermal runaway suppression effectiveness of the thermal management system of the battery pack has not been reported yet

This makes it difficult to investigate the reliability and safety of the battery pack thermal management system under abuse and extreme environmental conditions, and it is difficult to fully guarantee the safety of electric vehicles

Images